angular-cn/packages/upgrade/test/dynamic/upgrade_spec.ts

/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {ChangeDetectorRef, Component, EventEmitter, Input, NO_ERRORS_SCHEMA, NgModule, NgModuleFactory, NgZone, OnChanges, OnDestroy, Output, SimpleChange, SimpleChanges, Testability, destroyPlatform, forwardRef} from '@angular/core';
import {async, fakeAsync, flushMicrotasks, tick} from '@angular/core/testing';
import {BrowserModule} from '@angular/platform-browser';
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {fixmeIvy} from '@angular/private/testing';
import * as angular from '@angular/upgrade/src/common/angular1';
import {$EXCEPTION_HANDLER} from '@angular/upgrade/src/common/constants';
import {UpgradeAdapter, UpgradeAdapterRef} from '@angular/upgrade/src/dynamic/upgrade_adapter';

import {$apply, $digest, html, multiTrim, withEachNg1Version} from './test_helpers';

declare global {
  export var inject: Function;
}

withEachNg1Version(() => {
  describe('adapter: ng1 to ng2', () => {

    beforeEach(() => destroyPlatform());
    afterEach(() => destroyPlatform());

    describe('(basic use)', () => {
      it('should have AngularJS loaded', () => expect(angular.version.major).toBe(1));

      fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
          it('should instantiate ng2 in ng1 template and project content', async(() => {
               const ng1Module = angular.module('ng1', []);

               @Component({
                 selector: 'ng2',
                 template: `{{ 'NG2' }}(<ng-content></ng-content>)`,
               })
               class Ng2 {
               }

               @NgModule({declarations: [Ng2], imports: [BrowserModule]})
               class Ng2Module {
               }

               const element =
                   html('<div>{{ \'ng1[\' }}<ng2>~{{ \'ng-content\' }}~</ng2>{{ \']\' }}</div>');

               const adapter: UpgradeAdapter = new UpgradeAdapter(Ng2Module);
               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(document.body.textContent).toEqual('ng1[NG2(~ng-content~)]');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
          it('should instantiate ng1 in ng2 template and project content', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               @Component({
                 selector: 'ng2',
                 template: `{{ 'ng2(' }}<ng1>{{'transclude'}}</ng1>{{ ')' }}`,
               })
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng1', () => {
                 return {
                   transclude: true,
                   template: '{{ "ng1" }}(<ng-transclude></ng-transclude>)'
                 };
               });
               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));

               const element = html('<div>{{\'ng1(\'}}<ng2></ng2>{{\')\'}}</div>');

               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(document.body.textContent).toEqual('ng1(ng2(ng1(transclude)))');
                 ref.dispose();
               });
             }));

      it('supports the compilerOptions argument', async(() => {
           const platformRef = platformBrowserDynamic();
           spyOn(platformRef, 'bootstrapModule').and.callThrough();
           spyOn(platformRef, 'bootstrapModuleFactory').and.callThrough();

           const ng1Module = angular.module('ng1', []);
           @Component({selector: 'ng2', template: `{{ 'NG2' }}(<ng-content></ng-content>)`})
           class Ng2 {
           }

           const element =
               html('<div>{{ \'ng1[\' }}<ng2>~{{ \'ng-content\' }}~</ng2>{{ \']\' }}</div>');

           @NgModule({
             declarations: [Ng2],
             imports: [BrowserModule],
           })
           class Ng2AppModule {
             ngDoBootstrap() {}
           }

           const adapter: UpgradeAdapter = new UpgradeAdapter(Ng2AppModule, {providers: []});
           ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             expect(platformRef.bootstrapModule).toHaveBeenCalledWith(jasmine.any(Function), [
               {providers: []}, jasmine.any(Object)
             ]);
             expect(platformRef.bootstrapModuleFactory)
                 .toHaveBeenCalledWith(
                     jasmine.any(NgModuleFactory), {providers: [], ngZone: jasmine.any(NgZone)});
             ref.dispose();
           });
         }));
    });

    describe('bootstrap errors', () => {
      let adapter: UpgradeAdapter;

      beforeEach(() => {
        angular.module('ng1', []);

        @Component({
          selector: 'ng2',
          template: `<BAD TEMPLATE div></div>`,
        })
        class ng2Component {
        }

        @NgModule({
          declarations: [ng2Component],
          imports: [BrowserModule],
        })
        class Ng2Module {
        }

        adapter = new UpgradeAdapter(Ng2Module);
      });

      fixmeIvy(
          'FW-682: JIT compilation occurs at component definition time rather than bootstrap') &&
          it('should throw an uncaught error', fakeAsync(() => {
               const resolveSpy = jasmine.createSpy('resolveSpy');
               spyOn(console, 'error');

               expect(() => {
                 adapter.bootstrap(html('<ng2></ng2>'), ['ng1']).ready(resolveSpy);
                 flushMicrotasks();
               }).toThrowError();
               expect(resolveSpy).not.toHaveBeenCalled();
             }));

      fixmeIvy(
          'FW-682: JIT compilation occurs at component definition time rather than bootstrap') &&
          it('should output an error message to the console and re-throw', fakeAsync(() => {
               const consoleErrorSpy: jasmine.Spy = spyOn(console, 'error');
               expect(() => {
                 adapter.bootstrap(html('<ng2></ng2>'), ['ng1']);
                 flushMicrotasks();
               }).toThrowError();
               const args: any[] = consoleErrorSpy.calls.mostRecent().args;
               expect(consoleErrorSpy).toHaveBeenCalled();
               expect(args.length).toBeGreaterThan(0);
               expect(args[0]).toEqual(jasmine.any(Error));
             }));
    });

    describe('scope/component change-detection', () => {
      fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
          it('should interleave scope and component expressions', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);
               const log: string[] = [];
               const l = (value: string) => {
                 log.push(value);
                 return value + ';';
               };

               ng1Module.directive('ng1a', () => ({template: '{{ l(\'ng1a\') }}'}));
               ng1Module.directive('ng1b', () => ({template: '{{ l(\'ng1b\') }}'}));
               ng1Module.run(($rootScope: any) => {
                 $rootScope.l = l;
                 $rootScope.reset = () => log.length = 0;
               });

               @Component({
                 selector: 'ng2',
                 template: `{{l('2A')}}<ng1a></ng1a>{{l('2B')}}<ng1b></ng1b>{{l('2C')}}`
               })
               class Ng2 {
                 l: any;
                 constructor() { this.l = l; }
               }

               @NgModule({
                 declarations: [
                   adapter.upgradeNg1Component('ng1a'), adapter.upgradeNg1Component('ng1b'), Ng2
                 ],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));

               const element =
                   html('<div>{{reset(); l(\'1A\');}}<ng2>{{l(\'1B\')}}</ng2>{{l(\'1C\')}}</div>');
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(document.body.textContent).toEqual('1A;2A;ng1a;2B;ng1b;2C;1C;');
                 // https://github.com/angular/angular.js/issues/12983
                 expect(log).toEqual(['1A', '1C', '2A', '2B', '2C', 'ng1a', 'ng1b']);
                 ref.dispose();
               });
             }));


      fixmeIvy(
          'FW-712: Rendering is being run on next "animation frame" rather than "Zone.microTaskEmpty" trigger') &&
          it('should propagate changes to a downgraded component inside the ngZone', async(() => {
               let appComponent: AppComponent;
               let upgradeRef: UpgradeAdapterRef;

               @Component({selector: 'my-app', template: '<my-child [value]="value"></my-child>'})
               class AppComponent {
                 value?: number;
                 constructor() { appComponent = this; }
               }

               @Component({
                 selector: 'my-child',
                 template: '<div>{{valueFromPromise}}',
               })
               class ChildComponent {
                 valueFromPromise?: number;
                 @Input()
                 set value(v: number) { expect(NgZone.isInAngularZone()).toBe(true); }

                 constructor(private zone: NgZone) {}

                 ngOnChanges(changes: SimpleChanges) {
                   if (changes['value'].isFirstChange()) return;

                   // HACK(ivy): Using setTimeout allows this test to pass but hides the ivy
                   // renderer timing BC.
                   //  setTimeout(() => {
                   //    expect(element.textContent).toEqual('5');
                   //    upgradeRef.dispose();
                   //  }, 0);
                   this.zone.onMicrotaskEmpty.subscribe(() => {
                     expect(element.textContent).toEqual('5');
                     upgradeRef.dispose();
                   });

                   Promise.resolve().then(
                       () => this.valueFromPromise = changes['value'].currentValue);
                 }
               }

               @NgModule({declarations: [AppComponent, ChildComponent], imports: [BrowserModule]})
               class Ng2Module {
               }

               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []).directive(
                   'myApp', adapter.downgradeNg2Component(AppComponent));

               const element = html('<my-app></my-app>');

               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 upgradeRef = ref;
                 appComponent.value = 5;
               });
             }));

      // This test demonstrates https://github.com/angular/angular/issues/6385
      // which was invalidly fixed by https://github.com/angular/angular/pull/6386
      // it('should not trigger $digest from an async operation in a watcher', async(() => {
      //      @Component({selector: 'my-app', template: ''})
      //      class AppComponent {
      //      }

      //      @NgModule({declarations: [AppComponent], imports: [BrowserModule]})
      //      class Ng2Module {
      //      }

      //      const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
      //      const ng1Module = angular.module('ng1', []).directive(
      //          'myApp', adapter.downgradeNg2Component(AppComponent));

      //      const element = html('<my-app></my-app>');

      //      adapter.bootstrap(element, ['ng1']).ready((ref) => {
      //        let doTimeout = false;
      //        let timeoutId: number;
      //        ref.ng1RootScope.$watch(() => {
      //          if (doTimeout && !timeoutId) {
      //            timeoutId = window.setTimeout(function() {
      //              timeoutId = null;
      //            }, 10);
      //          }
      //        });
      //        doTimeout = true;
      //      });
      //    }));
    });

    describe('downgrade ng2 component', () => {
      it('should allow non-element selectors for downgraded components', async(() => {
           @Component({selector: '[itWorks]', template: 'It works'})
           class WorksComponent {
           }

           @NgModule({declarations: [WorksComponent], imports: [BrowserModule]})
           class Ng2Module {
           }

           const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
           const ng1Module = angular.module('ng1', []);
           ng1Module.directive('ng2', adapter.downgradeNg2Component(WorksComponent));

           const element = html('<ng2></ng2>');
           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             expect(multiTrim(document.body.textContent !)).toBe('It works');
           });
         }));

      fixmeIvy('FW-715: ngOnChanges being called a second time unexpectedly') &&
          it('should bind properties, events', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []).value(
                   $EXCEPTION_HANDLER, (err: any) => { throw err; });

               ng1Module.run(($rootScope: any) => {
                 $rootScope.name = 'world';
                 $rootScope.dataA = 'A';
                 $rootScope.dataB = 'B';
                 $rootScope.modelA = 'initModelA';
                 $rootScope.modelB = 'initModelB';
                 $rootScope.eventA = '?';
                 $rootScope.eventB = '?';
               });
               @Component({
                 selector: 'ng2',
                 inputs: ['literal', 'interpolate', 'oneWayA', 'oneWayB', 'twoWayA', 'twoWayB'],
                 outputs: [
                   'eventA', 'eventB', 'twoWayAEmitter: twoWayAChange',
                   'twoWayBEmitter: twoWayBChange'
                 ],
                 template: 'ignore: {{ignore}}; ' +
                     'literal: {{literal}}; interpolate: {{interpolate}}; ' +
                     'oneWayA: {{oneWayA}}; oneWayB: {{oneWayB}}; ' +
                     'twoWayA: {{twoWayA}}; twoWayB: {{twoWayB}}; ({{ngOnChangesCount}})'
               })
               class Ng2 {
                 ngOnChangesCount = 0;
                 ignore = '-';
                 literal = '?';
                 interpolate = '?';
                 oneWayA = '?';
                 oneWayB = '?';
                 twoWayA = '?';
                 twoWayB = '?';
                 eventA = new EventEmitter();
                 eventB = new EventEmitter();
                 twoWayAEmitter = new EventEmitter();
                 twoWayBEmitter = new EventEmitter();
                 ngOnChanges(changes: SimpleChanges) {
                   const assert = (prop: string, value: any) => {
                     if ((this as any)[prop] != value) {
                       throw new Error(
                           `Expected: '${prop}' to be '${value}' but was '${(this as any)[prop]}'`);
                     }
                   };

                   const assertChange = (prop: string, value: any) => {
                     assert(prop, value);
                     if (!changes[prop]) {
                       throw new Error(`Changes record for '${prop}' not found.`);
                     }
                     const actValue = changes[prop].currentValue;
                     if (actValue != value) {
                       throw new Error(
                           `Expected changes record for'${prop}' to be '${value}' but was '${actValue}'`);
                     }
                   };

                   switch (this.ngOnChangesCount++) {
                     case 0:
                       assert('ignore', '-');
                       assertChange('literal', 'Text');
                       assertChange('interpolate', 'Hello world');
                       assertChange('oneWayA', 'A');
                       assertChange('oneWayB', 'B');
                       assertChange('twoWayA', 'initModelA');
                       assertChange('twoWayB', 'initModelB');

                       this.twoWayAEmitter.emit('newA');
                       this.twoWayBEmitter.emit('newB');
                       this.eventA.emit('aFired');
                       this.eventB.emit('bFired');
                       break;
                     case 1:
                       assertChange('twoWayA', 'newA');
                       assertChange('twoWayB', 'newB');
                       break;
                     case 2:
                       assertChange('interpolate', 'Hello everyone');
                       break;
                     default:
                       throw new Error('Called too many times! ' + JSON.stringify(changes));
                   }
                 }
               }
               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));

               @NgModule({
                 declarations: [Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               const element = html(`<div>
              <ng2 literal="Text" interpolate="Hello {{name}}"
                   bind-one-way-a="dataA" [one-way-b]="dataB"
                   bindon-two-way-a="modelA" [(two-way-b)]="modelB"
                   on-event-a='eventA=$event' (event-b)="eventB=$event"></ng2>
              | modelA: {{modelA}}; modelB: {{modelB}}; eventA: {{eventA}}; eventB: {{eventB}};
              </div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent !))
                     .toEqual(
                         'ignore: -; ' +
                         'literal: Text; interpolate: Hello world; ' +
                         'oneWayA: A; oneWayB: B; twoWayA: newA; twoWayB: newB; (2) | ' +
                         'modelA: newA; modelB: newB; eventA: aFired; eventB: bFired;');

                 ref.ng1RootScope.$apply('name = "everyone"');
                 expect(multiTrim(document.body.textContent !))
                     .toEqual(
                         'ignore: -; ' +
                         'literal: Text; interpolate: Hello everyone; ' +
                         'oneWayA: A; oneWayB: B; twoWayA: newA; twoWayB: newB; (3) | ' +
                         'modelA: newA; modelB: newB; eventA: aFired; eventB: bFired;');

                 ref.dispose();
               });

             }));

      fixmeIvy('FW-715: ngOnChanges being called a second time unexpectedly') &&
          it('should support two-way binding and event listener', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const listenerSpy = jasmine.createSpy('$rootScope.listener');
               const ng1Module = angular.module('ng1', []).run(($rootScope: angular.IScope) => {
                 $rootScope['value'] = 'world';
                 $rootScope['listener'] = listenerSpy;
               });

               @Component({selector: 'ng2', template: `model: {{model}};`})
               class Ng2Component implements OnChanges {
                 ngOnChangesCount = 0;
                 @Input() model = '?';
                 @Output() modelChange = new EventEmitter();

                 ngOnChanges(changes: SimpleChanges) {
                   switch (this.ngOnChangesCount++) {
                     case 0:
                       expect(changes.model.currentValue).toBe('world');
                       this.modelChange.emit('newC');
                       break;
                     case 1:
                       expect(changes.model.currentValue).toBe('newC');
                       break;
                     default:
                       throw new Error('Called too many times! ' + JSON.stringify(changes));
                   }
                 }
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2Component));

               @NgModule({declarations: [Ng2Component], imports: [BrowserModule]})
               class Ng2Module {
                 ngDoBootstrap() {}
               }

               const element = html(`
           <div>
             <ng2 [(model)]="value" (model-change)="listener($event)"></ng2>
             | value: {{value}}
           </div>
         `);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(element.textContent)).toEqual('model: newC; | value: newC');
                 expect(listenerSpy).toHaveBeenCalledWith('newC');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-715: ngOnChanges being called a second time unexpectedly') &&
          it('should initialize inputs in time for `ngOnChanges`', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));

               @Component({
                 selector: 'ng2',
                 template: `
               ngOnChangesCount: {{ ngOnChangesCount }} |
               firstChangesCount: {{ firstChangesCount }} |
               initialValue: {{ initialValue }}`
               })
               class Ng2Component implements OnChanges {
                 ngOnChangesCount = 0;
                 firstChangesCount = 0;
                 // TODO(issue/24571): remove '!'.
                 initialValue !: string;
                 // TODO(issue/24571): remove '!'.
                 @Input() foo !: string;

                 ngOnChanges(changes: SimpleChanges) {
                   this.ngOnChangesCount++;

                   if (this.ngOnChangesCount === 1) {
                     this.initialValue = this.foo;
                   }

                   if (changes['foo'] && changes['foo'].isFirstChange()) {
                     this.firstChangesCount++;
                   }
                 }
               }

               @NgModule({imports: [BrowserModule], declarations: [Ng2Component]})
               class Ng2Module {
               }

               const ng1Module = angular.module('ng1', []).directive(
                   'ng2', adapter.downgradeNg2Component(Ng2Component));

               const element = html(`
             <ng2 [foo]="'foo'"></ng2>
             <ng2 foo="bar"></ng2>
             <ng2 [foo]="'baz'" ng-if="true"></ng2>
             <ng2 foo="qux" ng-if="true"></ng2>
           `);

               adapter.bootstrap(element, ['ng1']).ready(ref => {
                 const nodes = element.querySelectorAll('ng2');
                 const expectedTextWith = (value: string) =>
                     `ngOnChangesCount: 1 | firstChangesCount: 1 | initialValue: ${value}`;

                 expect(multiTrim(nodes[0].textContent)).toBe(expectedTextWith('foo'));
                 expect(multiTrim(nodes[1].textContent)).toBe(expectedTextWith('bar'));
                 expect(multiTrim(nodes[2].textContent)).toBe(expectedTextWith('baz'));
                 expect(multiTrim(nodes[3].textContent)).toBe(expectedTextWith('qux'));

                 ref.dispose();
               });
             }));

      it('should bind to ng-model', async(() => {
           const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
           const ng1Module = angular.module('ng1', []);

           ng1Module.run(($rootScope: any /** TODO #9100 */) => { $rootScope.modelA = 'A'; });

           let ng2Instance: Ng2;
           @Component({selector: 'ng2', template: '{{_value}}'})
           class Ng2 {
             private _value: any = '';
             private _onChangeCallback: (_: any) => void = () => {};
             private _onTouchedCallback: () => void = () => {};
             constructor() { ng2Instance = this; }
             writeValue(value: any) { this._value = value; }
             registerOnChange(fn: any) { this._onChangeCallback = fn; }
             registerOnTouched(fn: any) { this._onTouchedCallback = fn; }
             doTouch() { this._onTouchedCallback(); }
             doChange(newValue: string) {
               this._value = newValue;
               this._onChangeCallback(newValue);
             }
           }

           ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
           const element = html(`<div><ng2 ng-model="modelA"></ng2> | {{modelA}}</div>`);

           @NgModule({
             declarations: [Ng2],
             imports: [BrowserModule],
             schemas: [NO_ERRORS_SCHEMA],
           })
           class Ng2Module {
           }

           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             let $rootScope: any = ref.ng1RootScope;

             expect(multiTrim(document.body.textContent)).toEqual('A | A');

             $rootScope.modelA = 'B';
             $rootScope.$apply();
             expect(multiTrim(document.body.textContent)).toEqual('B | B');

             ng2Instance.doChange('C');
             expect($rootScope.modelA).toBe('C');
             expect(multiTrim(document.body.textContent)).toEqual('C | C');

             const downgradedElement = <Element>document.body.querySelector('ng2');
             expect(downgradedElement.classList.contains('ng-touched')).toBe(false);

             ng2Instance.doTouch();
             $rootScope.$apply();
             expect(downgradedElement.classList.contains('ng-touched')).toBe(true);

             ref.dispose();
           });
         }));

      it('should properly run cleanup when ng1 directive is destroyed', async(() => {
           const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
           const ng1Module = angular.module('ng1', []);
           const onDestroyed: EventEmitter<string> = new EventEmitter<string>();

           ng1Module.directive('ng1', () => {
             return {
               template: '<div ng-if="!destroyIt"><ng2></ng2></div>',
               controller: function($rootScope: any, $timeout: Function) {
                 $timeout(() => { $rootScope.destroyIt = true; });
               }
             };
           });

           @Component({selector: 'ng2', template: 'test'})
           class Ng2 {
             ngOnDestroy() { onDestroyed.emit('destroyed'); }
           }

           @NgModule({
             declarations: [Ng2],
             imports: [BrowserModule],
           })
           class Ng2Module {
           }

           ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
           const element = html('<ng1></ng1>');
           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             onDestroyed.subscribe(() => { ref.dispose(); });
           });
         }));

      fixmeIvy('FW-713: ngDestroy not being called when downgraded ng2 component is destroyed') &&
          it('should properly run cleanup with multiple levels of nesting', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               let destroyed = false;

               @Component(
                   {selector: 'ng2-outer', template: '<div *ngIf="!destroyIt"><ng1></ng1></div>'})
               class Ng2OuterComponent {
                 @Input() destroyIt = false;
               }

               @Component({selector: 'ng2-inner', template: 'test'})
               class Ng2InnerComponent implements OnDestroy {
                 ngOnDestroy() { destroyed = true; }
               }

               @NgModule({
                 imports: [BrowserModule],
                 declarations:
                     [Ng2InnerComponent, Ng2OuterComponent, adapter.upgradeNg1Component('ng1')],
                 schemas: [NO_ERRORS_SCHEMA],
               })
               class Ng2Module {
               }

               const ng1Module =
                   angular.module('ng1', [])
                       .directive('ng1', () => ({template: '<ng2-inner></ng2-inner>'}))
                       .directive('ng2Inner', adapter.downgradeNg2Component(Ng2InnerComponent))
                       .directive('ng2Outer', adapter.downgradeNg2Component(Ng2OuterComponent));

               const element = html('<ng2-outer [destroy-it]="destroyIt"></ng2-outer>');

               adapter.bootstrap(element, [ng1Module.name]).ready(ref => {
                 expect(element.textContent).toBe('test');
                 expect(destroyed).toBe(false);

                 $apply(ref, 'destroyIt = true');

                 expect(element.textContent).toBe('');
                 expect(destroyed).toBe(true);
               });
             }));

      it('should fallback to the root ng2.injector when compiled outside the dom', async(() => {
           const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
           const ng1Module = angular.module('ng1', []);

           ng1Module.directive('ng1', [
             '$compile',
             ($compile: Function) => {
               return {
                 link: function($scope: any, $element: any, $attrs: any) {
                   const compiled = $compile('<ng2></ng2>');
                   const template = compiled($scope);
                   $element.append(template);
                 }
               };
             }
           ]);

           @Component({selector: 'ng2', template: 'test'})
           class Ng2 {
           }

           @NgModule({
             declarations: [Ng2],
             imports: [BrowserModule],
           })
           class Ng2Module {
           }

           ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
           const element = html('<ng1></ng1>');
           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             expect(multiTrim(document.body.textContent)).toEqual('test');
             ref.dispose();
           });
         }));

      fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
          it('should support multi-slot projection', async(() => {
               const ng1Module = angular.module('ng1', []);

               @Component({
                 selector: 'ng2',
                 template: '2a(<ng-content select=".ng1a"></ng-content>)' +
                     '2b(<ng-content select=".ng1b"></ng-content>)'
               })
               class Ng2 {
               }

               @NgModule({declarations: [Ng2], imports: [BrowserModule]})
               class Ng2Module {
               }

               // The ng-if on one of the projected children is here to make sure
               // the correct slot is targeted even with structural directives in play.
               const element = html(
                   '<ng2><div ng-if="true" class="ng1a">1a</div><div' +
                   ' class="ng1b">1b</div></ng2>');

               const adapter: UpgradeAdapter = new UpgradeAdapter(Ng2Module);
               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(document.body.textContent).toEqual('2a(1a)2b(1b)');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
          it('should correctly project structural directives', async(() => {
               @Component(
                   {selector: 'ng2', template: 'ng2-{{ itemId }}(<ng-content></ng-content>)'})
               class Ng2Component {
                 // TODO(issue/24571): remove '!'.
                 @Input() itemId !: string;
               }

               @NgModule({imports: [BrowserModule], declarations: [Ng2Component]})
               class Ng2Module {
               }

               const adapter: UpgradeAdapter = new UpgradeAdapter(Ng2Module);
               const ng1Module =
                   angular.module('ng1', [])
                       .directive('ng2', adapter.downgradeNg2Component(Ng2Component))
                       .run(($rootScope: angular.IRootScopeService) => {
                         $rootScope['items'] = [
                           {id: 'a', subitems: [1, 2, 3]}, {id: 'b', subitems: [4, 5, 6]},
                           {id: 'c', subitems: [7, 8, 9]}
                         ];
                       });

               const element = html(`
             <ng2 ng-repeat="item in items" [item-id]="item.id">
               <div ng-repeat="subitem in item.subitems">{{ subitem }}</div>
             </ng2>
           `);

               adapter.bootstrap(element, [ng1Module.name]).ready(ref => {
                 expect(multiTrim(document.body.textContent))
                     .toBe('ng2-a( 123 )ng2-b( 456 )ng2-c( 789 )');
                 ref.dispose();
               });
             }));

      it('should allow attribute selectors for components in ng2', async(() => {
           const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => MyNg2Module));
           const ng1Module = angular.module('myExample', []);

           @Component({selector: '[works]', template: 'works!'})
           class WorksComponent {
           }

           @Component({selector: 'root-component', template: 'It <div works></div>'})
           class RootComponent {
           }

           @NgModule({imports: [BrowserModule], declarations: [RootComponent, WorksComponent]})
           class MyNg2Module {
           }

           ng1Module.directive('rootComponent', adapter.downgradeNg2Component(RootComponent));

           document.body.innerHTML = '<root-component></root-component>';
           adapter.bootstrap(document.body.firstElementChild !, ['myExample']).ready((ref) => {
             expect(multiTrim(document.body.textContent)).toEqual('It works!');
             ref.dispose();
           });
         }));
    });

    describe('upgrade ng1 component', () => {
      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support `@` bindings', fakeAsync(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               let ng2ComponentInstance: Ng2Component;

               // Define `ng1Component`
               const ng1Component: angular.IComponent = {
                 template: 'Inside: {{ $ctrl.inputA }}, {{ $ctrl.inputB }}',
                 bindings: {inputA: '@inputAttrA', inputB: '@'}
               };

               // Define `Ng2Component`
               @Component({
                 selector: 'ng2',
                 template: `
               <ng1 inputAttrA="{{ dataA }}" inputB="{{ dataB }}"></ng1>
               | Outside: {{ dataA }}, {{ dataB }}
             `
               })
               class Ng2Component {
                 dataA = 'foo';
                 dataB = 'bar';

                 constructor() { ng2ComponentInstance = this; }
               }

               // Define `ng1Module`
               const ng1Module = angular.module('ng1Module', [])
                                     .component('ng1', ng1Component)
                                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

               // Define `Ng2Module`
               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                 imports: [BrowserModule]
               })
               class Ng2Module {
               }

               // Bootstrap
               const element = html(`<ng2></ng2>`);

               adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                 const ng1 = element.querySelector('ng1') !;
                 const ng1Controller = angular.element(ng1).controller !('ng1');

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: foo, bar | Outside: foo, bar');

                 ng1Controller.inputA = 'baz';
                 ng1Controller.inputB = 'qux';
                 $digest(ref);

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: baz, qux | Outside: foo, bar');

                 ng2ComponentInstance.dataA = 'foo2';
                 ng2ComponentInstance.dataB = 'bar2';
                 $digest(ref);

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: foo2, bar2 | Outside: foo2, bar2');

                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support `<` bindings', fakeAsync(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               let ng2ComponentInstance: Ng2Component;

               // Define `ng1Component`
               const ng1Component: angular.IComponent = {
                 template: 'Inside: {{ $ctrl.inputA.value }}, {{ $ctrl.inputB.value }}',
                 bindings: {inputA: '<inputAttrA', inputB: '<'}
               };

               // Define `Ng2Component`
               @Component({
                 selector: 'ng2',
                 template: `
               <ng1 [inputAttrA]="dataA" [inputB]="dataB"></ng1>
               | Outside: {{ dataA.value }}, {{ dataB.value }}
             `
               })
               class Ng2Component {
                 dataA = {value: 'foo'};
                 dataB = {value: 'bar'};

                 constructor() { ng2ComponentInstance = this; }
               }

               // Define `ng1Module`
               const ng1Module = angular.module('ng1Module', [])
                                     .component('ng1', ng1Component)
                                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

               // Define `Ng2Module`
               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                 imports: [BrowserModule]
               })
               class Ng2Module {
               }

               // Bootstrap
               const element = html(`<ng2></ng2>`);

               adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                 const ng1 = element.querySelector('ng1') !;
                 const ng1Controller = angular.element(ng1).controller !('ng1');

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: foo, bar | Outside: foo, bar');

                 ng1Controller.inputA = {value: 'baz'};
                 ng1Controller.inputB = {value: 'qux'};
                 $digest(ref);

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: baz, qux | Outside: foo, bar');

                 ng2ComponentInstance.dataA = {value: 'foo2'};
                 ng2ComponentInstance.dataB = {value: 'bar2'};
                 $digest(ref);

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: foo2, bar2 | Outside: foo2, bar2');

                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support `=` bindings', fakeAsync(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               let ng2ComponentInstance: Ng2Component;

               // Define `ng1Component`
               const ng1Component: angular.IComponent = {
                 template: 'Inside: {{ $ctrl.inputA.value }}, {{ $ctrl.inputB.value }}',
                 bindings: {inputA: '=inputAttrA', inputB: '='}
               };

               // Define `Ng2Component`
               @Component({
                 selector: 'ng2',
                 template: `
               <ng1 [(inputAttrA)]="dataA" [(inputB)]="dataB"></ng1>
               | Outside: {{ dataA.value }}, {{ dataB.value }}
             `
               })
               class Ng2Component {
                 dataA = {value: 'foo'};
                 dataB = {value: 'bar'};

                 constructor() { ng2ComponentInstance = this; }
               }

               // Define `ng1Module`
               const ng1Module = angular.module('ng1Module', [])
                                     .component('ng1', ng1Component)
                                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

               // Define `Ng2Module`
               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                 imports: [BrowserModule]
               })
               class Ng2Module {
               }

               // Bootstrap
               const element = html(`<ng2></ng2>`);

               adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                 const ng1 = element.querySelector('ng1') !;
                 const ng1Controller = angular.element(ng1).controller !('ng1');

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: foo, bar | Outside: foo, bar');

                 ng1Controller.inputA = {value: 'baz'};
                 ng1Controller.inputB = {value: 'qux'};
                 $digest(ref);

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: baz, qux | Outside: baz, qux');

                 ng2ComponentInstance.dataA = {value: 'foo2'};
                 ng2ComponentInstance.dataB = {value: 'bar2'};
                 $digest(ref);

                 expect(multiTrim(element.textContent))
                     .toBe('Inside: foo2, bar2 | Outside: foo2, bar2');

                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support `&` bindings', fakeAsync(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));

               // Define `ng1Component`
               const ng1Component: angular.IComponent = {
                 template: 'Inside: -',
                 bindings: {outputA: '&outputAttrA', outputB: '&'}
               };

               // Define `Ng2Component`
               @Component({
                 selector: 'ng2',
                 template: `
               <ng1 (outputAttrA)="dataA = $event" (outputB)="dataB = $event"></ng1>
               | Outside: {{ dataA }}, {{ dataB }}
             `
               })
               class Ng2Component {
                 dataA = 'foo';
                 dataB = 'bar';
               }

               // Define `ng1Module`
               const ng1Module = angular.module('ng1Module', [])
                                     .component('ng1', ng1Component)
                                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

               // Define `Ng2Module`
               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                 imports: [BrowserModule]
               })
               class Ng2Module {
               }

               // Bootstrap
               const element = html(`<ng2></ng2>`);

               adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                 const ng1 = element.querySelector('ng1') !;
                 const ng1Controller = angular.element(ng1).controller !('ng1');

                 expect(multiTrim(element.textContent)).toBe('Inside: - | Outside: foo, bar');

                 ng1Controller.outputA('baz');
                 ng1Controller.outputB('qux');
                 $digest(ref);

                 expect(multiTrim(element.textContent)).toBe('Inside: - | Outside: baz, qux');

                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should bind properties, events', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = () => {
                 return {
                   template: 'Hello {{fullName}}; A: {{modelA}}; B: {{modelB}}; C: {{modelC}}; | ',
                   scope:
                       {fullName: '@', modelA: '=dataA', modelB: '=dataB', modelC: '=', event: '&'},
                   link: function(scope: any) {
                     scope.$watch('modelB', (v: string) => {
                       if (v == 'Savkin') {
                         scope.modelB = 'SAVKIN';
                         scope.event('WORKS');

                         // Should not update because [model-a] is uni directional
                         scope.modelA = 'VICTOR';
                       }
                     });
                   }
                 };
               };
               ng1Module.directive('ng1', ng1);
               @Component({
                 selector: 'ng2',
                 template:
                     '<ng1 fullName="{{last}}, {{first}}, {{city}}" [dataA]="first" [(dataB)]="last" [modelC]="city" ' +
                     '(event)="event=$event"></ng1>' +
                     '<ng1 fullName="{{\'TEST\'}}" dataA="First" dataB="Last" modelC="City"></ng1>' +
                     '{{event}}-{{last}}, {{first}}, {{city}}'
               })
               class Ng2 {
                 first = 'Victor';
                 last = 'Savkin';
                 city = 'SF';
                 event = '?';
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 // we need to do setTimeout, because the EventEmitter uses setTimeout to schedule
                 // events, and so without this we would not see the events processed.
                 setTimeout(() => {
                   expect(multiTrim(document.body.textContent))
                       .toEqual(
                           'Hello SAVKIN, Victor, SF; A: VICTOR; B: SAVKIN; C: SF; | Hello TEST; A: First; B: Last; C: City; | WORKS-SAVKIN, Victor, SF');
                   ref.dispose();
                 }, 0);
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should bind optional properties', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = () => {
                 return {
                   template: 'Hello; A: {{modelA}}; B: {{modelB}}; | ',
                   scope: {modelA: '=?dataA', modelB: '=?'}
                 };
               };
               ng1Module.directive('ng1', ng1);
               @Component({
                 selector: 'ng2',
                 template: '<ng1 [dataA]="first" [modelB]="last"></ng1>' +
                     '<ng1 dataA="First" modelB="Last"></ng1>' +
                     '<ng1></ng1>' +
                     '<ng1></ng1>'
               })
               class Ng2 {
                 first = 'Victor';
                 last = 'Savkin';
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 // we need to do setTimeout, because the EventEmitter uses setTimeout to schedule
                 // events, and so without this we would not see the events processed.
                 setTimeout(() => {
                   expect(multiTrim(document.body.textContent))
                       .toEqual(
                           'Hello; A: Victor; B: Savkin; | Hello; A: First; B: Last; | Hello; A: ; B: ; | Hello; A: ; B: ; |');
                   ref.dispose();
                 }, 0);
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should bind properties, events in controller when bindToController is not used',
             async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = () => {
                 return {
                   restrict: 'E',
                   template: '{{someText}} - Length: {{data.length}}',
                   scope: {data: '='},
                   controller: function($scope: any) {
                     $scope.someText = 'ng1 - Data: ' + $scope.data;
                   }
                 };
               };

               ng1Module.directive('ng1', ng1);
               @Component({
                 selector: 'ng2',
                 template:
                     '{{someText}} - Length: {{dataList.length}} | <ng1 [(data)]="dataList"></ng1>'
               })
               class Ng2 {
                 dataList = [1, 2, 3];
                 someText = 'ng2';
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 // we need to do setTimeout, because the EventEmitter uses setTimeout to schedule
                 // events, and so without this we would not see the events processed.
                 setTimeout(() => {
                   expect(multiTrim(document.body.textContent))
                       .toEqual('ng2 - Length: 3 | ng1 - Data: 1,2,3 - Length: 3');
                   ref.dispose();
                 }, 0);
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should bind properties, events in link function', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = () => {
                 return {
                   restrict: 'E',
                   template: '{{someText}} - Length: {{data.length}}',
                   scope: {data: '='},
                   link: function($scope: any) { $scope.someText = 'ng1 - Data: ' + $scope.data; }
                 };
               };

               ng1Module.directive('ng1', ng1);
               @Component({
                 selector: 'ng2',
                 template:
                     '{{someText}} - Length: {{dataList.length}} | <ng1 [(data)]="dataList"></ng1>'
               })
               class Ng2 {
                 dataList = [1, 2, 3];
                 someText = 'ng2';
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 // we need to do setTimeout, because the EventEmitter uses setTimeout to schedule
                 // events, and so without this we would not see the events processed.
                 setTimeout(() => {
                   expect(multiTrim(document.body.textContent))
                       .toEqual('ng2 - Length: 3 | ng1 - Data: 1,2,3 - Length: 3');
                   ref.dispose();
                 }, 0);
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support templateUrl fetched from $httpBackend', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);
               ng1Module.value(
                   '$httpBackend', (method: string, url: string, post: any, cbFn: Function) => {
                     cbFn(200, `${method}:${url}`);
                   });

               const ng1 = () => { return {templateUrl: 'url.html'}; };
               ng1Module.directive('ng1', ng1);
               @Component({selector: 'ng2', template: '<ng1></ng1>'})
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual('GET:url.html');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support templateUrl as a function', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);
               ng1Module.value(
                   '$httpBackend', (method: string, url: string, post: any, cbFn: Function) => {
                     cbFn(200, `${method}:${url}`);
                   });

               const ng1 = () => { return {templateUrl() { return 'url.html'; }}; };
               ng1Module.directive('ng1', ng1);
               @Component({selector: 'ng2', template: '<ng1></ng1>'})
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual('GET:url.html');
                 ref.dispose();
               });
             }));

      it('should support empty template', async(() => {
           const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
           const ng1Module = angular.module('ng1', []);

           const ng1 = () => { return {template: ''}; };
           ng1Module.directive('ng1', ng1);

           @Component({selector: 'ng2', template: '<ng1></ng1>'})
           class Ng2 {
           }

           @NgModule({
             declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
             imports: [BrowserModule],
           })
           class Ng2Module {
           }

           ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
           const element = html(`<div><ng2></ng2></div>`);
           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             expect(multiTrim(document.body.textContent)).toEqual('');
             ref.dispose();
           });
         }));

      it('should support template as a function', async(() => {
           const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
           const ng1Module = angular.module('ng1', []);

           const ng1 = () => { return {template() { return ''; }}; };
           ng1Module.directive('ng1', ng1);

           @Component({selector: 'ng2', template: '<ng1></ng1>'})
           class Ng2 {
           }

           @NgModule({
             declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
             imports: [BrowserModule],
           })
           class Ng2Module {
           }

           ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
           const element = html(`<div><ng2></ng2></div>`);
           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             expect(multiTrim(document.body.textContent)).toEqual('');
             ref.dispose();
           });
         }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support templateUrl fetched from $templateCache', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);
               ng1Module.run(($templateCache: any) => $templateCache.put('url.html', 'WORKS'));

               const ng1 = () => { return {templateUrl: 'url.html'}; };
               ng1Module.directive('ng1', ng1);

               @Component({selector: 'ng2', template: '<ng1></ng1>'})
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual('WORKS');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support controller with controllerAs', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = () => {
                 return {
                   scope: true,
                   template:
                       '{{ctl.scope}}; {{ctl.isClass}}; {{ctl.hasElement}}; {{ctl.isPublished()}}',
                   controllerAs: 'ctl',
                   controller: class {
                     scope: any; hasElement: string; $element: any; isClass: any;
                     constructor($scope: any, $element: any) {
                       this.verifyIAmAClass();
                       this.scope =
                           $scope.$parent.$parent == $scope.$root ? 'scope' : 'wrong-scope';
                       this.hasElement = $element[0].nodeName;
                       this.$element = $element;
                     } verifyIAmAClass() { this.isClass = 'isClass'; } isPublished() {
                       return this.$element.controller('ng1') == this ? 'published' :
                                                                        'not-published';
                     }
                   }
                 };
               };
               ng1Module.directive('ng1', ng1);

               @Component({selector: 'ng2', template: '<ng1></ng1>'})
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent))
                     .toEqual('scope; isClass; NG1; published');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support bindToController', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = () => {
                 return {
                   scope: {title: '@'},
                   bindToController: true,
                   template: '{{ctl.title}}',
                   controllerAs: 'ctl',
                   controller: class {}
                 };
               };
               ng1Module.directive('ng1', ng1);

               @Component({selector: 'ng2', template: '<ng1 title="WORKS"></ng1>'})
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual('WORKS');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support bindToController with bindings', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = () => {
                 return {
                   scope: {},
                   bindToController: {title: '@'},
                   template: '{{ctl.title}}',
                   controllerAs: 'ctl',
                   controller: class {}
                 };
               };
               ng1Module.directive('ng1', ng1);

               @Component({selector: 'ng2', template: '<ng1 title="WORKS"></ng1>'})
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual('WORKS');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support single require in linking fn', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = ($rootScope: any) => {
                 return {
                   scope: {title: '@'},
                   bindToController: true,
                   template: '{{ctl.status}}',
                   require: 'ng1',
                   controllerAs: 'ctrl',
                   controller: class {status = 'WORKS';},
                   link: function(scope: any, element: any, attrs: any, linkController: any) {
                     expect(scope.$root).toEqual($rootScope);
                     expect(element[0].nodeName).toEqual('NG1');
                     expect(linkController.status).toEqual('WORKS');
                     scope.ctl = linkController;
                   }
                 };
               };
               ng1Module.directive('ng1', ng1);

               @Component({selector: 'ng2', template: '<ng1></ng1>'})
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual('WORKS');
                 ref.dispose();
               });
             }));

      fixmeIvy('FW-724: upgraded ng1 components are not being rendered') &&
          it('should support array require in linking fn', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const parent = () => { return {controller: class {parent = 'PARENT';}}; };
               const ng1 = () => {
                 return {
                   scope: {title: '@'},
                   bindToController: true,
                   template: '{{parent.parent}}:{{ng1.status}}',
                   require: ['ng1', '^parent', '?^^notFound'],
                   controllerAs: 'ctrl',
                   controller: class {status = 'WORKS';},
                   link: function(scope: any, element: any, attrs: any, linkControllers: any) {
                     expect(linkControllers[0].status).toEqual('WORKS');
                     expect(linkControllers[1].parent).toEqual('PARENT');
                     expect(linkControllers[2]).toBe(undefined);
                     scope.ng1 = linkControllers[0];
                     scope.parent = linkControllers[1];
                   }
                 };
               };
               ng1Module.directive('parent', parent);
               ng1Module.directive('ng1', ng1);

               @Component({selector: 'ng2', template: '<ng1></ng1>'})
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));
               const element = html(`<div><parent><ng2></ng2></parent></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual('PARENT:WORKS');
                 ref.dispose();
               });
             }));

      describe('with lifecycle hooks', () => {
        fixmeIvy('unknown') &&
            it('should call `$onInit()` on controller', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $onInitSpyA = jasmine.createSpy('$onInitA');
                 const $onInitSpyB = jasmine.createSpy('$onInitB');

                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a> | <ng1-b></ng1-b>'})
                 class Ng2Component {
                 }

                 angular.module('ng1', [])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: class {$onInit() { $onInitSpyA(); }}
                                        }))
                     .directive('ng1B', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: false,
                                          controllerAs: '$ctrl',
                                          controller: function() { this.$onInit = $onInitSpyB; }
                                        }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   expect($onInitSpyA).toHaveBeenCalled();
                   expect($onInitSpyB).toHaveBeenCalled();

                   ref.dispose();
                 });
               }));

        fixmeIvy('unknown') &&
            it('should not call `$onInit()` on scope', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $onInitSpy = jasmine.createSpy('$onInit');

                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a> | <ng1-b></ng1-b>'})
                 class Ng2Component {
                 }

                 angular.module('ng1', [])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            Object.getPrototypeOf($scope).$onInit = $onInitSpy;
                                          }
                                        }))
                     .directive('ng1B', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: false,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            $scope['$onInit'] = $onInitSpy;
                                          }
                                        }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   expect($onInitSpy).not.toHaveBeenCalled();
                   ref.dispose();
                 });
               }));

        fixmeIvy('unknown') &&
            it('should call `$doCheck()` on controller', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $doCheckSpyA = jasmine.createSpy('$doCheckA');
                 const $doCheckSpyB = jasmine.createSpy('$doCheckB');
                 let changeDetector: ChangeDetectorRef;

                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a> | <ng1-b></ng1-b>'})
                 class Ng2Component {
                   constructor(cd: ChangeDetectorRef) { changeDetector = cd; }
                 }

                 angular.module('ng1', [])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: class {$doCheck() { $doCheckSpyA(); }}
                                        }))
                     .directive('ng1B', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: false,
                                          controllerAs: '$ctrl',
                                          controller: function() { this.$doCheck = $doCheckSpyB; }
                                        }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   expect($doCheckSpyA).toHaveBeenCalled();
                   expect($doCheckSpyB).toHaveBeenCalled();

                   $doCheckSpyA.calls.reset();
                   $doCheckSpyB.calls.reset();
                   changeDetector.detectChanges();

                   expect($doCheckSpyA).toHaveBeenCalled();
                   expect($doCheckSpyB).toHaveBeenCalled();

                   ref.dispose();
                 });
               }));

        fixmeIvy('unknown') &&
            it('should not call `$doCheck()` on scope', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $doCheckSpyA = jasmine.createSpy('$doCheckA');
                 const $doCheckSpyB = jasmine.createSpy('$doCheckB');
                 let changeDetector: ChangeDetectorRef;

                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a> | <ng1-b></ng1-b>'})
                 class Ng2Component {
                   constructor(cd: ChangeDetectorRef) { changeDetector = cd; }
                 }

                 angular.module('ng1', [])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            Object.getPrototypeOf($scope).$doCheck = $doCheckSpyA;
                                          }
                                        }))
                     .directive('ng1B', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: false,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            $scope['$doCheck'] = $doCheckSpyB;
                                          }
                                        }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   $doCheckSpyA.calls.reset();
                   $doCheckSpyB.calls.reset();
                   changeDetector.detectChanges();

                   expect($doCheckSpyA).not.toHaveBeenCalled();
                   expect($doCheckSpyB).not.toHaveBeenCalled();

                   ref.dispose();
                 });
               }));

        fixmeIvy('unknown') &&
            it('should call `$postLink()` on controller', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $postLinkSpyA = jasmine.createSpy('$postLinkA');
                 const $postLinkSpyB = jasmine.createSpy('$postLinkB');

                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a> | <ng1-b></ng1-b>'})
                 class Ng2Component {
                 }

                 angular.module('ng1', [])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: class {$postLink() { $postLinkSpyA(); }}
                                        }))
                     .directive('ng1B', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: false,
                                          controllerAs: '$ctrl',
                                          controller: function() { this.$postLink = $postLinkSpyB; }
                                        }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   expect($postLinkSpyA).toHaveBeenCalled();
                   expect($postLinkSpyB).toHaveBeenCalled();

                   ref.dispose();
                 });
               }));

        fixmeIvy('unknown') &&
            it('should not call `$postLink()` on scope', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $postLinkSpy = jasmine.createSpy('$postLink');

                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a> | <ng1-b></ng1-b>'})
                 class Ng2Component {
                 }

                 angular.module('ng1', [])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            Object.getPrototypeOf($scope).$postLink = $postLinkSpy;
                                          }
                                        }))
                     .directive('ng1B', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: false,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            $scope['$postLink'] = $postLinkSpy;
                                          }
                                        }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   expect($postLinkSpy).not.toHaveBeenCalled();
                   ref.dispose();
                 });
               }));

        fixmeIvy('unknown') &&
            it('should call `$onChanges()` on binding destination', fakeAsync(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $onChangesControllerSpyA = jasmine.createSpy('$onChangesControllerA');
                 const $onChangesControllerSpyB = jasmine.createSpy('$onChangesControllerB');
                 const $onChangesScopeSpy = jasmine.createSpy('$onChangesScope');
                 let ng2Instance: any;

                 @Component({
                   selector: 'ng2',
                   template: '<ng1-a [valA]="val"></ng1-a> | <ng1-b [valB]="val"></ng1-b>'
                 })
                 class Ng2Component {
                   constructor() { ng2Instance = this; }
                 }

                 angular.module('ng1', [])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {valA: '<'},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            this.$onChanges = $onChangesControllerSpyA;
                                          }
                                        }))
                     .directive('ng1B', () => ({
                                          template: '',
                                          scope: {valB: '<'},
                                          bindToController: false,
                                          controllerAs: '$ctrl',
                                          controller: class {
                                            $onChanges(changes: SimpleChanges) {
                                              $onChangesControllerSpyB(changes);
                                            }
                                          }
                                        }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component))
                     .run(($rootScope: angular.IRootScopeService) => {
                       Object.getPrototypeOf($rootScope).$onChanges = $onChangesScopeSpy;
                     });


                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   // Initial `$onChanges()` call
                   tick();

                   expect($onChangesControllerSpyA.calls.count()).toBe(1);
                   expect($onChangesControllerSpyA.calls.argsFor(0)[0]).toEqual({
                     valA: jasmine.any(SimpleChange)
                   });

                   expect($onChangesControllerSpyB).not.toHaveBeenCalled();

                   expect($onChangesScopeSpy.calls.count()).toBe(1);
                   expect($onChangesScopeSpy.calls.argsFor(0)[0]).toEqual({
                     valB: jasmine.any(SimpleChange)
                   });

                   $onChangesControllerSpyA.calls.reset();
                   $onChangesControllerSpyB.calls.reset();
                   $onChangesScopeSpy.calls.reset();

                   // `$onChanges()` call after a change
                   ng2Instance.val = 'new value';
                   tick();
                   ref.ng1RootScope.$digest();

                   expect($onChangesControllerSpyA.calls.count()).toBe(1);
                   expect($onChangesControllerSpyA.calls.argsFor(0)[0]).toEqual({
                     valA: jasmine.objectContaining({currentValue: 'new value'})
                   });

                   expect($onChangesControllerSpyB).not.toHaveBeenCalled();

                   expect($onChangesScopeSpy.calls.count()).toBe(1);
                   expect($onChangesScopeSpy.calls.argsFor(0)[0]).toEqual({
                     valB: jasmine.objectContaining({currentValue: 'new value'})
                   });

                   ref.dispose();
                 });
               }));

        fixmeIvy('unknown') &&
            it('should call `$onDestroy()` on controller', fakeAsync(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $onDestroySpyA = jasmine.createSpy('$onDestroyA');
                 const $onDestroySpyB = jasmine.createSpy('$onDestroyB');
                 let ng2ComponentInstance: Ng2Component;

                 @Component({
                   selector: 'ng2',
                   template: `
                <div *ngIf="!ng2Destroy">
                  <ng1-a></ng1-a> | <ng1-b></ng1-b>
                </div>
              `
                 })
                 class Ng2Component {
                   ng2Destroy: boolean = false;
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // On browsers that don't support `requestAnimationFrame` (IE 9, Android <= 4.3),
                 // `$animate` will use `setTimeout(..., 16.6)` instead. This timeout will still be
                 // on
                 // the queue at the end of the test, causing it to fail.
                 // Mocking animations (via `ngAnimateMock`) avoids the issue.
                 angular.module('ng1', ['ngAnimateMock'])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: class {$onDestroy() { $onDestroySpyA(); }}
                                        }))
                     .directive(
                         'ng1B', () => ({
                                   template: '',
                                   scope: {},
                                   bindToController: false,
                                   controllerAs: '$ctrl',
                                   controller: function() { this.$onDestroy = $onDestroySpyB; }
                                 }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div ng-if="!ng1Destroy"><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   const $rootScope = ref.ng1RootScope as any;

                   $rootScope.ng1Destroy = false;
                   tick();
                   $rootScope.$digest();

                   expect($onDestroySpyA).not.toHaveBeenCalled();
                   expect($onDestroySpyB).not.toHaveBeenCalled();

                   $rootScope.ng1Destroy = true;
                   tick();
                   $rootScope.$digest();

                   expect($onDestroySpyA).toHaveBeenCalled();
                   expect($onDestroySpyB).toHaveBeenCalled();

                   $onDestroySpyA.calls.reset();
                   $onDestroySpyB.calls.reset();

                   $rootScope.ng1Destroy = false;
                   tick();
                   $rootScope.$digest();

                   expect($onDestroySpyA).not.toHaveBeenCalled();
                   expect($onDestroySpyB).not.toHaveBeenCalled();

                   ng2ComponentInstance.ng2Destroy = true;
                   tick();
                   $rootScope.$digest();

                   expect($onDestroySpyA).toHaveBeenCalled();
                   expect($onDestroySpyB).toHaveBeenCalled();

                   ref.dispose();
                 });
               }));

        fixmeIvy('unknown') &&
            it('should not call `$onDestroy()` on scope', fakeAsync(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const $onDestroySpy = jasmine.createSpy('$onDestroy');
                 let ng2ComponentInstance: Ng2Component;

                 @Component({
                   selector: 'ng2',
                   template: `
                <div *ngIf="!ng2Destroy">
                  <ng1-a></ng1-a> | <ng1-b></ng1-b>
                </div>
              `
                 })
                 class Ng2Component {
                   ng2Destroy: boolean = false;
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // On browsers that don't support `requestAnimationFrame` (IE 9, Android <= 4.3),
                 // `$animate` will use `setTimeout(..., 16.6)` instead. This timeout will still be
                 // on
                 // the queue at the end of the test, causing it to fail.
                 // Mocking animations (via `ngAnimateMock`) avoids the issue.
                 angular.module('ng1', ['ngAnimateMock'])
                     .directive('ng1A', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: true,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            Object.getPrototypeOf($scope).$onDestroy =
                                                $onDestroySpy;
                                          }
                                        }))
                     .directive('ng1B', () => ({
                                          template: '',
                                          scope: {},
                                          bindToController: false,
                                          controllerAs: '$ctrl',
                                          controller: function($scope: angular.IScope) {
                                            $scope['$onDestroy'] = $onDestroySpy;
                                          }
                                        }))
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [
                     adapter.upgradeNg1Component('ng1A'), adapter.upgradeNg1Component('ng1B'),
                     Ng2Component
                   ],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html(`<div ng-if="!ng1Destroy"><ng2></ng2></div>`);
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   const $rootScope = ref.ng1RootScope as any;

                   $rootScope.ng1Destroy = false;
                   tick();
                   $rootScope.$digest();

                   $rootScope.ng1Destroy = true;
                   tick();
                   $rootScope.$digest();

                   $rootScope.ng1Destroy = false;
                   tick();
                   $rootScope.$digest();

                   ng2ComponentInstance.ng2Destroy = true;
                   tick();
                   $rootScope.$digest();

                   expect($onDestroySpy).not.toHaveBeenCalled();

                   ref.dispose();
                 });
               }));
      });

      describe('destroying the upgraded component', () => {
        fixmeIvy('FW-713: ngDestroy not being called when downgraded ng2 component is destroyed') &&
            it('should destroy `componentScope`', fakeAsync(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const scopeDestroyListener = jasmine.createSpy('scopeDestroyListener');
                 let ng2ComponentInstance: Ng2Component;

                 @Component(
                     {selector: 'ng2', template: '<div *ngIf="!ng2Destroy"><ng1></ng1></div>'})
                 class Ng2Component {
                   ng2Destroy: boolean = false;
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // On browsers that don't support `requestAnimationFrame` (IE 9, Android <= 4.3),
                 // `$animate` will use `setTimeout(..., 16.6)` instead. This timeout will still be
                 // on
                 // the queue at the end of the test, causing it to fail.
                 // Mocking animations (via `ngAnimateMock`) avoids the issue.
                 angular.module('ng1', ['ngAnimateMock'])
                     .component('ng1', {
                       controller: function($scope: angular.IScope) {
                         $scope.$on('$destroy', scopeDestroyListener);
                       },
                     })
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html('<ng2></ng2>');
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   const $rootScope = ref.ng1RootScope as any;

                   expect(scopeDestroyListener).not.toHaveBeenCalled();

                   ng2ComponentInstance.ng2Destroy = true;
                   tick();
                   $rootScope.$digest();

                   expect(scopeDestroyListener).toHaveBeenCalledTimes(1);
                 });
               }));

        fixmeIvy('FW-713: ngDestroy not being called when downgraded ng2 component is destroyed') &&
            it('should emit `$destroy` on `$element` and descendants', fakeAsync(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const elementDestroyListener = jasmine.createSpy('elementDestroyListener');
                 const descendantDestroyListener = jasmine.createSpy('descendantDestroyListener');
                 let ng2ComponentInstance: Ng2Component;

                 @Component(
                     {selector: 'ng2', template: '<div *ngIf="!ng2Destroy"><ng1></ng1></div>'})
                 class Ng2Component {
                   ng2Destroy: boolean = false;
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // On browsers that don't support `requestAnimationFrame` (IE 9, Android <= 4.3),
                 // `$animate` will use `setTimeout(..., 16.6)` instead. This timeout will still be
                 // on
                 // the queue at the end of the test, causing it to fail.
                 // Mocking animations (via `ngAnimateMock`) avoids the issue.
                 angular.module('ng1', ['ngAnimateMock'])
                     .component('ng1', {
                       controller: class {
                         constructor(private $element: angular.IAugmentedJQuery) {} $onInit() {
                           this.$element.on !('$destroy', elementDestroyListener);
                           this.$element.contents !().on !('$destroy', descendantDestroyListener);
                         }
                       },
                       template: '<div></div>'
                     })
                     .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 @NgModule({
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                   imports: [BrowserModule],
                 })
                 class Ng2Module {
                 }

                 const element = html('<ng2></ng2>');
                 adapter.bootstrap(element, ['ng1']).ready((ref) => {
                   const $rootScope = ref.ng1RootScope as any;
                   tick();
                   $rootScope.$digest();

                   expect(elementDestroyListener).not.toHaveBeenCalled();
                   expect(descendantDestroyListener).not.toHaveBeenCalled();

                   ng2ComponentInstance.ng2Destroy = true;
                   tick();
                   $rootScope.$digest();

                   expect(elementDestroyListener).toHaveBeenCalledTimes(1);
                   expect(descendantDestroyListener).toHaveBeenCalledTimes(1);
                 });
               }));

        fixmeIvy('FW-713: ngDestroy not being called when downgraded ng2 component is destroyed') &&
            it('should clear data on `$element` and descendants', fakeAsync(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 let ng1ComponentElement: angular.IAugmentedJQuery;
                 let ng2ComponentAInstance: Ng2ComponentA;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   controller: class {
                     constructor(private $element: angular.IAugmentedJQuery) {} $onInit() {
                       this.$element.data !('test', 1);
                       this.$element.contents !().data !('test', 2);

                       ng1ComponentElement = this.$element;
                     }
                   },
                   template: '<div></div>'
                 };

                 // Define `Ng2Component`
                 @Component({selector: 'ng2A', template: '<ng2B *ngIf="!destroyIt"></ng2B>'})
                 class Ng2ComponentA {
                   destroyIt = false;

                   constructor() { ng2ComponentAInstance = this; }
                 }

                 @Component({selector: 'ng2B', template: '<ng1></ng1>'})
                 class Ng2ComponentB {
                 }

                 // Define `ng1Module`
                 angular.module('ng1Module', [])
                     .component('ng1', ng1Component)
                     .directive('ng2A', adapter.downgradeNg2Component(Ng2ComponentA));

                 // Define `Ng2Module`
                 @NgModule({
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2ComponentA, Ng2ComponentB],
                   entryComponents: [Ng2ComponentA],
                   imports: [BrowserModule]
                 })
                 class Ng2Module {
                   ngDoBootstrap() {}
                 }

                 // Bootstrap
                 const element = html(`<ng2-a></ng2-a>`);

                 adapter.bootstrap(element, ['ng1Module']).ready((ref) => {
                   const $rootScope = ref.ng1RootScope as any;
                   tick();
                   $rootScope.$digest();
                   expect(ng1ComponentElement.data !('test')).toBe(1);
                   expect(ng1ComponentElement.contents !().data !('test')).toBe(2);

                   ng2ComponentAInstance.destroyIt = true;
                   tick();
                   $rootScope.$digest();

                   expect(ng1ComponentElement.data !('test')).toBeUndefined();
                   expect(ng1ComponentElement.contents !().data !('test')).toBeUndefined();
                 });
               }));

        fixmeIvy('FW-713: ngDestroy not being called when downgraded ng2 component is destroyed') &&
            it('should clear dom listeners on `$element` and descendants`', fakeAsync(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const elementClickListener = jasmine.createSpy('elementClickListener');
                 const descendantClickListener = jasmine.createSpy('descendantClickListener');
                 let ng1DescendantElement: angular.IAugmentedJQuery;
                 let ng2ComponentAInstance: Ng2ComponentA;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   controller: class {
                     constructor(private $element: angular.IAugmentedJQuery) {} $onInit() {
                       ng1DescendantElement = this.$element.contents !();

                       this.$element.on !('click', elementClickListener);
                       ng1DescendantElement.on !('click', descendantClickListener);
                     }
                   },
                   template: '<div></div>'
                 };

                 // Define `Ng2Component`
                 @Component({selector: 'ng2A', template: '<ng2B *ngIf="!destroyIt"></ng2B>'})
                 class Ng2ComponentA {
                   destroyIt = false;

                   constructor() { ng2ComponentAInstance = this; }
                 }

                 @Component({selector: 'ng2B', template: '<ng1></ng1>'})
                 class Ng2ComponentB {
                 }

                 // Define `ng1Module`
                 angular.module('ng1Module', [])
                     .component('ng1', ng1Component)
                     .directive('ng2A', adapter.downgradeNg2Component(Ng2ComponentA));

                 // Define `Ng2Module`
                 @NgModule({
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2ComponentA, Ng2ComponentB],
                   entryComponents: [Ng2ComponentA],
                   imports: [BrowserModule]
                 })
                 class Ng2Module {
                   ngDoBootstrap() {}
                 }

                 // Bootstrap
                 const element = html(`<ng2-a></ng2-a>`);

                 adapter.bootstrap(element, ['ng1Module']).ready((ref) => {
                   const $rootScope = ref.ng1RootScope as any;
                   tick();
                   $rootScope.$digest();
                   (ng1DescendantElement[0] as HTMLElement).click();
                   expect(elementClickListener).toHaveBeenCalledTimes(1);
                   expect(descendantClickListener).toHaveBeenCalledTimes(1);

                   ng2ComponentAInstance.destroyIt = true;
                   tick();
                   $rootScope.$digest();

                   (ng1DescendantElement[0] as HTMLElement).click();
                   expect(elementClickListener).toHaveBeenCalledTimes(1);
                   expect(descendantClickListener).toHaveBeenCalledTimes(1);
                 });
               }));
      });

      describe('linking', () => {
        fixmeIvy('unknown') &&
            it('should run the pre-linking after instantiating the controller', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const log: string[] = [];

                 // Define `ng1Directive`
                 const ng1Directive: angular.IDirective = {
                   template: '',
                   link: {pre: () => log.push('ng1-pre')},
                   controller: class {constructor() { log.push('ng1-ctrl'); }}
                 };

                 // Define `Ng2Component`
                 @Component({selector: 'ng2', template: '<ng1></ng1>'})
                 class Ng2Component {
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1', [])
                         .directive('ng1', () => ng1Directive)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1']).ready(() => {
                   setTimeout(() => expect(log).toEqual(['ng1-ctrl', 'ng1-pre']), 1000);
                 });
               }));

        fixmeIvy('unknown') &&
            it('should run the pre-linking function before linking', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const log: string[] = [];

                 // Define `ng1Directive`
                 const ng1DirectiveA: angular.IDirective = {
                   template: '<ng1-b></ng1-b>',
                   link: {pre: () => log.push('ng1A-pre')}
                 };

                 const ng1DirectiveB: angular.IDirective = {link: () => log.push('ng1B-post')};

                 // Define `Ng2Component`
                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a>'})
                 class Ng2Component {
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1', [])
                         .directive('ng1A', () => ng1DirectiveA)
                         .directive('ng1B', () => ng1DirectiveB)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1A'), Ng2Component],
                   schemas: [NO_ERRORS_SCHEMA]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1']).ready(() => {
                   expect(log).toEqual(['ng1A-pre', 'ng1B-post']);
                 });
               }));

        fixmeIvy('unknown') &&
            it('should run the post-linking function after linking (link: object)', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const log: string[] = [];

                 // Define `ng1Directive`
                 const ng1DirectiveA: angular.IDirective = {
                   template: '<ng1-b></ng1-b>',
                   link: {post: () => log.push('ng1A-post')}
                 };

                 const ng1DirectiveB: angular.IDirective = {link: () => log.push('ng1B-post')};

                 // Define `Ng2Component`
                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a>'})
                 class Ng2Component {
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1', [])
                         .directive('ng1A', () => ng1DirectiveA)
                         .directive('ng1B', () => ng1DirectiveB)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1A'), Ng2Component],
                   schemas: [NO_ERRORS_SCHEMA]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1']).ready(() => {
                   expect(log).toEqual(['ng1B-post', 'ng1A-post']);
                 });
               }));

        fixmeIvy('unknown') &&
            it('should run the post-linking function after linking (link: function)', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const log: string[] = [];

                 // Define `ng1Directive`
                 const ng1DirectiveA: angular.IDirective = {
                   template: '<ng1-b></ng1-b>',
                   link: () => log.push('ng1A-post')
                 };

                 const ng1DirectiveB: angular.IDirective = {link: () => log.push('ng1B-post')};

                 // Define `Ng2Component`
                 @Component({selector: 'ng2', template: '<ng1-a></ng1-a>'})
                 class Ng2Component {
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1', [])
                         .directive('ng1A', () => ng1DirectiveA)
                         .directive('ng1B', () => ng1DirectiveB)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1A'), Ng2Component],
                   schemas: [NO_ERRORS_SCHEMA]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1']).ready(() => {
                   expect(log).toEqual(['ng1B-post', 'ng1A-post']);
                 });
               }));

        fixmeIvy('unknown') &&
            it('should run the post-linking function before `$postLink`', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 const log: string[] = [];

                 // Define `ng1Directive`
                 const ng1Directive: angular.IDirective = {
                   template: '',
                   link: () => log.push('ng1-post'),
                   controller: class {$postLink() { log.push('ng1-$post'); }}
                 };

                 // Define `Ng2Component`
                 @Component({selector: 'ng2', template: '<ng1></ng1>'})
                 class Ng2Component {
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1', [])
                         .directive('ng1', () => ng1Directive)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1']).ready(() => {
                   expect(log).toEqual(['ng1-post', 'ng1-$post']);
                 });
               }));
      });

      describe('transclusion', () => {
        fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
            it('should support single-slot transclusion', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 let ng2ComponentAInstance: Ng2ComponentA;
                 let ng2ComponentBInstance: Ng2ComponentB;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   template: 'ng1(<div ng-transclude></div>)',
                   transclude: true
                 };

                 // Define `Ng2Component`
                 @Component({
                   selector: 'ng2A',
                   template: 'ng2A(<ng1>{{ value }} | <ng2B *ngIf="showB"></ng2B></ng1>)'
                 })
                 class Ng2ComponentA {
                   value = 'foo';
                   showB = false;
                   constructor() { ng2ComponentAInstance = this; }
                 }

                 @Component({selector: 'ng2B', template: 'ng2B({{ value }})'})
                 class Ng2ComponentB {
                   value = 'bar';
                   constructor() { ng2ComponentBInstance = this; }
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1Module', [])
                         .component('ng1', ng1Component)
                         .directive('ng2A', adapter.downgradeNg2Component(Ng2ComponentA));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations:
                       [adapter.upgradeNg1Component('ng1'), Ng2ComponentA, Ng2ComponentB]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2-a></ng2-a>`);

                 adapter.bootstrap(element, ['ng1Module']).ready((ref) => {
                   expect(multiTrim(element.textContent)).toBe('ng2A(ng1(foo | ))');

                   ng2ComponentAInstance.value = 'baz';
                   ng2ComponentAInstance.showB = true;
                   $digest(ref);

                   expect(multiTrim(element.textContent)).toBe('ng2A(ng1(baz | ng2B(bar)))');

                   ng2ComponentBInstance.value = 'qux';
                   $digest(ref);

                   expect(multiTrim(element.textContent)).toBe('ng2A(ng1(baz | ng2B(qux)))');
                 });
               }));

        fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
            it('should support single-slot transclusion with fallback content', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 let ng1ControllerInstances: any[] = [];
                 let ng2ComponentInstance: Ng2Component;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   template: 'ng1(<div ng-transclude>{{ $ctrl.value }}</div>)',
                   transclude: true,
                   controller: class {
                     value = 'from-ng1'; constructor() { ng1ControllerInstances.push(this); }
                   }
                 };

                 // Define `Ng2Component`
                 @Component({
                   selector: 'ng2',
                   template: `
                ng2(
                  <ng1><div>{{ value }}</div></ng1> |

                  <!-- Interpolation-only content should still be detected as transcluded content. -->
                  <ng1>{{ value }}</ng1> |

                  <ng1></ng1>
                )`
                 })
                 class Ng2Component {
                   value = 'from-ng2';
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1Module', [])
                         .component('ng1', ng1Component)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(from-ng2)|ng1(from-ng2)|ng1(from-ng1))');

                   ng1ControllerInstances.forEach(ctrl => ctrl.value = 'ng1-foo');
                   ng2ComponentInstance.value = 'ng2-bar';
                   $digest(ref);

                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(ng2-bar)|ng1(ng2-bar)|ng1(ng1-foo))');
                 });
               }));

        fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
            it('should support multi-slot transclusion', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 let ng2ComponentInstance: Ng2Component;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   template:
                       'ng1(x(<div ng-transclude="slotX"></div>) | y(<div ng-transclude="slotY"></div>))',
                   transclude: {slotX: 'contentX', slotY: 'contentY'}
                 };

                 // Define `Ng2Component`
                 @Component({
                   selector: 'ng2',
                   template: `
                ng2(
                  <ng1>
                    <content-x>{{ x }}1</content-x>
                    <content-y>{{ y }}1</content-y>
                    <content-x>{{ x }}2</content-x>
                    <content-y>{{ y }}2</content-y>
                  </ng1>
                )`
                 })
                 class Ng2Component {
                   x = 'foo';
                   y = 'bar';
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1Module', [])
                         .component('ng1', ng1Component)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                   schemas: [NO_ERRORS_SCHEMA]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(x(foo1foo2)|y(bar1bar2)))');

                   ng2ComponentInstance.x = 'baz';
                   ng2ComponentInstance.y = 'qux';
                   $digest(ref);

                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(x(baz1baz2)|y(qux1qux2)))');
                 });
               }));

        fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
            it('should support default slot (with fallback content)', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 let ng1ControllerInstances: any[] = [];
                 let ng2ComponentInstance: Ng2Component;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   template: 'ng1(default(<div ng-transclude="">fallback-{{ $ctrl.value }}</div>))',
                   transclude: {slotX: 'contentX', slotY: 'contentY'},
                   controller:
                       class {value = 'ng1'; constructor() { ng1ControllerInstances.push(this); }}
                 };

                 // Define `Ng2Component`
                 @Component({
                   selector: 'ng2',
                   template: `
                ng2(
                  <ng1>
                    ({{ x }})
                    <content-x>ignored x</content-x>
                    {{ x }}-<span>{{ y }}</span>
                    <content-y>ignored y</content-y>
                    <span>({{ y }})</span>
                  </ng1> |

                  <!--
                    Remove any whitespace, because in AngularJS versions prior to 1.6
                    even whitespace counts as transcluded content.
                  -->
                  <ng1><content-x>ignored x</content-x><content-y>ignored y</content-y></ng1> |

                  <!--
                    Interpolation-only content should still be detected as transcluded content.
                  -->
                  <ng1>{{ x }}<content-x>ignored x</content-x>{{ y + x }}<content-y>ignored y</content-y>{{ y }}</ng1>
                )`
                 })
                 class Ng2Component {
                   x = 'foo';
                   y = 'bar';
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1Module', [])
                         .component('ng1', ng1Component)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                   schemas: [NO_ERRORS_SCHEMA]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                   expect(multiTrim(element.textContent, true))
                       .toBe(
                           'ng2(ng1(default((foo)foo-bar(bar)))|ng1(default(fallback-ng1))|ng1(default(foobarfoobar)))');

                   ng1ControllerInstances.forEach(ctrl => ctrl.value = 'ng1-plus');
                   ng2ComponentInstance.x = 'baz';
                   ng2ComponentInstance.y = 'qux';
                   $digest(ref);

                   expect(multiTrim(element.textContent, true))
                       .toBe(
                           'ng2(ng1(default((baz)baz-qux(qux)))|ng1(default(fallback-ng1-plus))|ng1(default(bazquxbazqux)))');
                 });
               }));

        fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
            it('should support optional transclusion slots (with fallback content)', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 let ng1ControllerInstances: any[] = [];
                 let ng2ComponentInstance: Ng2Component;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   template: `
                ng1(
                  x(<div ng-transclude="slotX">{{ $ctrl.x }}</div>) |
                  y(<div ng-transclude="slotY">{{ $ctrl.y }}</div>)
                )`,
                   transclude: {slotX: '?contentX', slotY: '?contentY'},
                   controller: class {
                     x = 'ng1X'; y = 'ng1Y'; constructor() { ng1ControllerInstances.push(this); }
                   }
                 };

                 // Define `Ng2Component`
                 @Component({
                   selector: 'ng2',
                   template: `
                ng2(
                  <ng1><content-x>{{ x }}</content-x></ng1> |
                  <ng1><content-y>{{ y }}</content-y></ng1>
                )`
                 })
                 class Ng2Component {
                   x = 'ng2X';
                   y = 'ng2Y';
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1Module', [])
                         .component('ng1', ng1Component)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                   schemas: [NO_ERRORS_SCHEMA]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(x(ng2X)|y(ng1Y))|ng1(x(ng1X)|y(ng2Y)))');

                   ng1ControllerInstances.forEach(ctrl => {
                     ctrl.x = 'ng1X-foo';
                     ctrl.y = 'ng1Y-bar';
                   });
                   ng2ComponentInstance.x = 'ng2X-baz';
                   ng2ComponentInstance.y = 'ng2Y-qux';
                   $digest(ref);

                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(x(ng2X-baz)|y(ng1Y-bar))|ng1(x(ng1X-foo)|y(ng2Y-qux)))');
                 });
               }));

        fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
            it('should throw if a non-optional slot is not filled', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 let errorMessage: string;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   template: '',
                   transclude: {slotX: '?contentX', slotY: 'contentY'}
                 };

                 // Define `Ng2Component`
                 @Component({selector: 'ng2', template: '<ng1></ng1>'})
                 class Ng2Component {
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1Module', [])
                         .value($EXCEPTION_HANDLER, (error: Error) => errorMessage = error.message)
                         .component('ng1', ng1Component)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                   expect(errorMessage)
                       .toContain('Required transclusion slot \'slotY\' on directive: ng1');
                 });
               }));

        fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
            it('should support structural directives in transcluded content', async(() => {
                 const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
                 let ng2ComponentInstance: Ng2Component;

                 // Define `ng1Component`
                 const ng1Component: angular.IComponent = {
                   template:
                       'ng1(x(<div ng-transclude="slotX"></div>) | default(<div ng-transclude=""></div>))',
                   transclude: {slotX: 'contentX'}
                 };

                 // Define `Ng2Component`
                 @Component({
                   selector: 'ng2',
                   template: `
                ng2(
                  <ng1>
                    <content-x><div *ngIf="show">{{ x }}1</div></content-x>
                    <div *ngIf="!show">{{ y }}1</div>
                    <content-x><div *ngIf="!show">{{ x }}2</div></content-x>
                    <div *ngIf="show">{{ y }}2</div>
                  </ng1>
                )`
                 })
                 class Ng2Component {
                   x = 'foo';
                   y = 'bar';
                   show = true;
                   constructor() { ng2ComponentInstance = this; }
                 }

                 // Define `ng1Module`
                 const ng1Module =
                     angular.module('ng1Module', [])
                         .component('ng1', ng1Component)
                         .directive('ng2', adapter.downgradeNg2Component(Ng2Component));

                 // Define `Ng2Module`
                 @NgModule({
                   imports: [BrowserModule],
                   declarations: [adapter.upgradeNg1Component('ng1'), Ng2Component],
                   schemas: [NO_ERRORS_SCHEMA]
                 })
                 class Ng2Module {
                 }

                 // Bootstrap
                 const element = html(`<ng2></ng2>`);

                 adapter.bootstrap(element, ['ng1Module']).ready(ref => {
                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(x(foo1)|default(bar2)))');

                   ng2ComponentInstance.x = 'baz';
                   ng2ComponentInstance.y = 'qux';
                   ng2ComponentInstance.show = false;
                   $digest(ref);

                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(x(baz2)|default(qux1)))');

                   ng2ComponentInstance.show = true;
                   $digest(ref);

                   expect(multiTrim(element.textContent, true))
                       .toBe('ng2(ng1(x(baz1)|default(qux2)))');
                 });
               }));
      });

      fixmeIvy('unknown') &&
          it('should bind input properties (<) of components', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = {
                 bindings: {personProfile: '<'},
                 template:
                     'Hello {{$ctrl.personProfile.firstName}} {{$ctrl.personProfile.lastName}}',
                 controller: class {}
               };
               ng1Module.component('ng1', ng1);

               @Component({selector: 'ng2', template: '<ng1 [personProfile]="goku"></ng1>'})
               class Ng2 {
                 goku = {firstName: 'GOKU', lastName: 'SAN'};
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               ng1Module.directive('ng2', adapter.downgradeNg2Component(Ng2));

               const element = html(`<div><ng2></ng2></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual(`Hello GOKU SAN`);
                 ref.dispose();
               });
             }));

      fixmeIvy('unknown') &&
          it('should support ng2 > ng1 > ng2', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const ng1Module = angular.module('ng1', []);

               const ng1 = {
                 template: 'ng1(<ng2b></ng2b>)',
               };
               ng1Module.component('ng1', ng1);

               @Component({selector: 'ng2a', template: 'ng2a(<ng1></ng1>)'})
               class Ng2a {
               }
               ng1Module.directive('ng2a', adapter.downgradeNg2Component(Ng2a));

               @Component({selector: 'ng2b', template: 'ng2b'})
               class Ng2b {
               }
               ng1Module.directive('ng2b', adapter.downgradeNg2Component(Ng2b));

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2a, Ng2b],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               const element = html(`<div><ng2a></ng2a></div>`);
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(multiTrim(document.body.textContent)).toEqual('ng2a(ng1(ng2b))');
               });
             }));
    });

    describe('injection', () => {
      function SomeToken() {}

      it('should export ng2 instance to ng1', async(() => {
           @NgModule({
             providers: [{provide: SomeToken, useValue: 'correct_value'}],
             imports: [BrowserModule],
           })
           class MyNg2Module {
           }

           const adapter: UpgradeAdapter = new UpgradeAdapter(MyNg2Module);
           const module = angular.module('myExample', []);
           module.factory('someToken', adapter.downgradeNg2Provider(SomeToken));
           adapter.bootstrap(html('<div>'), ['myExample']).ready((ref) => {
             expect(ref.ng1Injector.get('someToken')).toBe('correct_value');
             ref.dispose();
           });
         }));

      it('should export ng1 instance to ng2', async(() => {
           @NgModule({imports: [BrowserModule]})
           class MyNg2Module {
           }

           const adapter: UpgradeAdapter = new UpgradeAdapter(MyNg2Module);
           const module = angular.module('myExample', []);
           module.value('testValue', 'secreteToken');
           adapter.upgradeNg1Provider('testValue');
           adapter.upgradeNg1Provider('testValue', {asToken: 'testToken'});
           adapter.upgradeNg1Provider('testValue', {asToken: String});
           adapter.bootstrap(html('<div>'), ['myExample']).ready((ref) => {
             expect(ref.ng2Injector.get('testValue')).toBe('secreteToken');
             expect(ref.ng2Injector.get(String)).toBe('secreteToken');
             expect(ref.ng2Injector.get('testToken')).toBe('secreteToken');
             ref.dispose();
           });
         }));

      fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
          it('should respect hierarchical dependency injection for ng2', async(() => {
               const ng1Module = angular.module('ng1', []);

               @Component(
                   {selector: 'ng2-parent', template: `ng2-parent(<ng-content></ng-content>)`})
               class Ng2Parent {
               }
               @Component({selector: 'ng2-child', template: `ng2-child`})
               class Ng2Child {
                 constructor(parent: Ng2Parent) {}
               }

               @NgModule({declarations: [Ng2Parent, Ng2Child], imports: [BrowserModule]})
               class Ng2Module {
               }

               const element = html('<ng2-parent><ng2-child></ng2-child></ng2-parent>');

               const adapter: UpgradeAdapter = new UpgradeAdapter(Ng2Module);
               ng1Module.directive('ng2Parent', adapter.downgradeNg2Component(Ng2Parent))
                   .directive('ng2Child', adapter.downgradeNg2Component(Ng2Child));
               adapter.bootstrap(element, ['ng1']).ready((ref) => {
                 expect(document.body.textContent).toEqual('ng2-parent(ng2-child)');
                 ref.dispose();
               });
             }));
    });

    describe('testability', () => {
      it('should handle deferred bootstrap', async(() => {
           @NgModule({imports: [BrowserModule]})
           class MyNg2Module {
           }

           const adapter: UpgradeAdapter = new UpgradeAdapter(MyNg2Module);
           angular.module('ng1', []);
           let bootstrapResumed: boolean = false;

           const element = html('<div></div>');
           window.name = 'NG_DEFER_BOOTSTRAP!' + window.name;

           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             expect(bootstrapResumed).toEqual(true);
             ref.dispose();
           });

           setTimeout(() => {
             bootstrapResumed = true;
             (<any>window).angular.resumeBootstrap();
           }, 100);
         }));

      it('should propagate return value of resumeBootstrap', fakeAsync(() => {
           @NgModule({imports: [BrowserModule]})
           class MyNg2Module {
           }

           const adapter: UpgradeAdapter = new UpgradeAdapter(MyNg2Module);
           const ng1Module = angular.module('ng1', []);
           let a1Injector: angular.IInjectorService|undefined;
           ng1Module.run([
             '$injector', function($injector: angular.IInjectorService) { a1Injector = $injector; }
           ]);

           const element = html('<div></div>');
           window.name = 'NG_DEFER_BOOTSTRAP!' + window.name;

           adapter.bootstrap(element, [ng1Module.name]).ready((ref) => { ref.dispose(); });

           tick(100);

           const value = (<any>window).angular.resumeBootstrap();
           expect(value).toBe(a1Injector);
         }));

      it('should wait for ng2 testability', async(() => {
           @NgModule({imports: [BrowserModule]})
           class MyNg2Module {
           }

           const adapter: UpgradeAdapter = new UpgradeAdapter(MyNg2Module);
           angular.module('ng1', []);
           const element = html('<div></div>');
           adapter.bootstrap(element, ['ng1']).ready((ref) => {
             const ng2Testability: Testability = ref.ng2Injector.get(Testability);
             ng2Testability.increasePendingRequestCount();
             let ng2Stable = false;

             angular.getTestability(element).whenStable(() => {
               expect(ng2Stable).toEqual(true);
               ref.dispose();
             });

             setTimeout(() => {
               ng2Stable = true;
               ng2Testability.decreasePendingRequestCount();
             }, 100);
           });
         }));
    });

    describe('examples', () => {
      fixmeIvy('FW-714: ng1 projected content is not being rendered') &&
          it('should verify UpgradeAdapter example', async(() => {
               const adapter: UpgradeAdapter = new UpgradeAdapter(forwardRef(() => Ng2Module));
               const module = angular.module('myExample', []);

               const ng1 = () => {
                 return {
                   scope: {title: '='},
                   transclude: true,
                   template: 'ng1[Hello {{title}}!](<span ng-transclude></span>)'
                 };
               };
               module.directive('ng1', ng1);

               @Component({
                 selector: 'ng2',
                 inputs: ['name'],
                 template: 'ng2[<ng1 [title]="name">transclude</ng1>](<ng-content></ng-content>)'
               })
               class Ng2 {
               }

               @NgModule({
                 declarations: [adapter.upgradeNg1Component('ng1'), Ng2],
                 imports: [BrowserModule],
               })
               class Ng2Module {
               }

               module.directive('ng2', adapter.downgradeNg2Component(Ng2));

               document.body.innerHTML = '<ng2 name="World">project</ng2>';

               adapter.bootstrap(document.body.firstElementChild !, ['myExample']).ready((ref) => {
                 expect(multiTrim(document.body.textContent))
                     .toEqual('ng2[ng1[Hello World!](transclude)](project)');
                 ref.dispose();
               });
             }));
    });

    describe('registerForNg1Tests', () => {
      let upgradeAdapterRef: UpgradeAdapterRef;
      let $compile: angular.ICompileService;
      let $rootScope: angular.IRootScopeService;

      beforeEach(() => {
        const ng1Module = angular.module('ng1', []);

        @Component({
          selector: 'ng2',
          template: 'Hello World',
        })
        class Ng2 {
        }

        @NgModule({declarations: [Ng2], imports: [BrowserModule]})
        class Ng2Module {
        }

        const upgradeAdapter = new UpgradeAdapter(Ng2Module);
        ng1Module.directive('ng2', upgradeAdapter.downgradeNg2Component(Ng2));

        upgradeAdapterRef = upgradeAdapter.registerForNg1Tests(['ng1']);
      });

      beforeEach(() => {
        inject((_$compile_: angular.ICompileService, _$rootScope_: angular.IRootScopeService) => {
          $compile = _$compile_;
          $rootScope = _$rootScope_;
        });
      });

      it('should be able to test ng1 components that use ng2 components', async(() => {
           upgradeAdapterRef.ready(() => {
             const element = $compile('<ng2></ng2>')($rootScope);
             $rootScope.$digest();
             expect(element[0].textContent).toContain('Hello World');
           });
         }));
    });
  });
});