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();
              });
            }));

        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();
              });
            }));

        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();
              });
            }));

        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');
           });
         }));
    });
  });
});