angular-docs-cn/modules/@angular/platform-browser/test/browser/bootstrap_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 {LowerCasePipe, NgIf} from '@angular/common';
import {XHR} from '@angular/compiler';
import {APP_INITIALIZER, Component, Directive, ExceptionHandler, Inject, OnDestroy, PLATFORM_DIRECTIVES, PLATFORM_INITIALIZER, PLATFORM_PIPES, ReflectiveInjector, coreLoadAndBootstrap, createPlatform, provide} from '@angular/core';
import {ApplicationRef, disposePlatform} from '@angular/core/src/application_ref';
import {Console} from '@angular/core/src/console';
import {ComponentRef} from '@angular/core/src/linker/component_factory';
import {Testability, TestabilityRegistry} from '@angular/core/src/testability/testability';
import {ComponentFixture} from '@angular/core/testing';
import {AsyncTestCompleter, Log, afterEach, beforeEach, beforeEachProviders, ddescribe, describe, expect, iit, inject, it} from '@angular/core/testing/testing_internal';
import {BROWSER_APP_PROVIDERS, BROWSER_PLATFORM_PROVIDERS} from '@angular/platform-browser';
import {BROWSER_APP_COMPILER_PROVIDERS, bootstrap} from '@angular/platform-browser-dynamic';
import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
import {DOCUMENT} from '@angular/platform-browser/src/dom/dom_tokens';

import {PromiseWrapper} from '../../src/facade/async';
import {stringify} from '../../src/facade/lang';

@Component({selector: 'hello-app', template: '{{greeting}} world!'})
class HelloRootCmp {
  greeting: string;
  constructor() { this.greeting = 'hello'; }
}

@Component({selector: 'hello-app', template: 'before: <ng-content></ng-content> after: done'})
class HelloRootCmpContent {
  constructor() {}
}

@Component({selector: 'hello-app-2', template: '{{greeting}} world, again!'})
class HelloRootCmp2 {
  greeting: string;
  constructor() { this.greeting = 'hello'; }
}

@Component({selector: 'hello-app', template: ''})
class HelloRootCmp3 {
  appBinding: any /** TODO #9100 */;

  constructor(@Inject('appBinding') appBinding: any /** TODO #9100 */) {
    this.appBinding = appBinding;
  }
}

@Component({selector: 'hello-app', template: ''})
class HelloRootCmp4 {
  appRef: any /** TODO #9100 */;

  constructor(@Inject(ApplicationRef) appRef: ApplicationRef) { this.appRef = appRef; }
}

@Component({selector: 'hello-app'})
class HelloRootMissingTemplate {
}

@Directive({selector: 'hello-app'})
class HelloRootDirectiveIsNotCmp {
}

@Component({selector: 'hello-app', template: ''})
class HelloOnDestroyTickCmp implements OnDestroy {
  appRef: ApplicationRef;
  constructor(@Inject(ApplicationRef) appRef: ApplicationRef) { this.appRef = appRef; }

  ngOnDestroy(): void { this.appRef.tick(); }
}

@Component({selector: 'hello-app', templateUrl: './sometemplate.html'})
class HelloUrlCmp {
  greeting = 'hello';
}

@Component({
  selector: 'hello-app',
  template: `<div  [title]="'HELLO' | lowercase"></div><div *ngIf="show"></div>`
})
class HelloCmpUsingPlatformDirectiveAndPipe {
  show: boolean = false;
}

class _ArrayLogger {
  res: any[] = [];
  log(s: any): void { this.res.push(s); }
  logError(s: any): void { this.res.push(s); }
  logGroup(s: any): void { this.res.push(s); }
  logGroupEnd(){};
}


class DummyConsole implements Console {
  log(message: any /** TODO #9100 */) {}
  warn(message: any /** TODO #9100 */) {}
}

export function main() {
  var fakeDoc: any /** TODO #9100 */, el: any /** TODO #9100 */, el2: any /** TODO #9100 */,
      testProviders: any /** TODO #9100 */, lightDom: any /** TODO #9100 */;

  describe('bootstrap factory method', () => {
    beforeEachProviders(() => { return [Log]; });

    beforeEach(() => {
      disposePlatform();

      fakeDoc = getDOM().createHtmlDocument();
      el = getDOM().createElement('hello-app', fakeDoc);
      el2 = getDOM().createElement('hello-app-2', fakeDoc);
      lightDom = getDOM().createElement('light-dom-el', fakeDoc);
      getDOM().appendChild(fakeDoc.body, el);
      getDOM().appendChild(fakeDoc.body, el2);
      getDOM().appendChild(el, lightDom);
      getDOM().setText(lightDom, 'loading');
      testProviders =
          [{provide: DOCUMENT, useValue: fakeDoc}, {provide: Console, useClass: DummyConsole}];
    });

    afterEach(disposePlatform);

    it('should throw if bootstrapped Directive is not a Component', () => {
      expect(() => bootstrap(HelloRootDirectiveIsNotCmp))
          .toThrowError(
              `Could not compile '${stringify(HelloRootDirectiveIsNotCmp)}' because it is not a component.`);
    });

    it('should throw if no element is found',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         var logger = new _ArrayLogger();
         var exceptionHandler = new ExceptionHandler(logger, false);

         var refPromise =
             bootstrap(HelloRootCmp, [{provide: ExceptionHandler, useValue: exceptionHandler}]);
         PromiseWrapper.then(refPromise, null, (reason) => {
           expect(reason.message).toContain('The selector "hello-app" did not match any elements');
           async.done();
           return null;
         });
       }));

    if (getDOM().supportsDOMEvents()) {
      it('should forward the error to promise when bootstrap fails',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           // Skip for dart since it causes a confusing error message in console when test passes.
           var logger = new _ArrayLogger();
           var exceptionHandler = new ExceptionHandler(logger, false);

           var refPromise =
               bootstrap(HelloRootCmp, [{provide: ExceptionHandler, useValue: exceptionHandler}]);
           PromiseWrapper.then(refPromise, null, (reason: any) => {
             expect(reason.message)
                 .toContain('The selector "hello-app" did not match any elements');
             async.done();
           });
         }));

      it('should invoke the default exception handler when bootstrap fails',
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           var logger = new _ArrayLogger();
           var exceptionHandler = new ExceptionHandler(logger, false);

           var refPromise =
               bootstrap(HelloRootCmp, [{provide: ExceptionHandler, useValue: exceptionHandler}]);
           PromiseWrapper.then(refPromise, null, (reason) => {
             expect(logger.res.join(''))
                 .toContain('The selector "hello-app" did not match any elements');
             async.done();
             return null;
           });
         }));
    }

    it('should create an injector promise', () => {
      var refPromise = bootstrap(HelloRootCmp, testProviders);
      expect(refPromise).not.toBe(null);
    });

    it('should display hello world', inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         var refPromise = bootstrap(HelloRootCmp, testProviders);
         refPromise.then((ref) => {
           expect(el).toHaveText('hello world!');
           async.done();
         });
       }));

    it('should support multiple calls to bootstrap',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         var refPromise1 = bootstrap(HelloRootCmp, testProviders);
         var refPromise2 = bootstrap(HelloRootCmp2, testProviders);
         PromiseWrapper.all([refPromise1, refPromise2]).then((refs) => {
           expect(el).toHaveText('hello world!');
           expect(el2).toHaveText('hello world, again!');
           async.done();
         });
       }));

    it('should not crash if change detection is invoked when the root component is disposed',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         bootstrap(HelloOnDestroyTickCmp, testProviders).then((ref) => {
           expect(() => ref.destroy()).not.toThrow();
           async.done();
         });
       }));

    it('should unregister change detectors when components are disposed',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         var platform =
             createPlatform(ReflectiveInjector.resolveAndCreate(BROWSER_PLATFORM_PROVIDERS));
         var app = ReflectiveInjector
                       .resolveAndCreate(
                           [BROWSER_APP_PROVIDERS, BROWSER_APP_COMPILER_PROVIDERS, testProviders],
                           platform.injector)
                       .get(ApplicationRef);
         coreLoadAndBootstrap(HelloRootCmp, app.injector).then((ref) => {
           ref.destroy();
           expect(() => app.tick()).not.toThrow();
           async.done();
         });
       }));

    it('should make the provided bindings available to the application component',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         var refPromise = bootstrap(
             HelloRootCmp3, [testProviders, {provide: 'appBinding', useValue: 'BoundValue'}]);

         refPromise.then((ref) => {
           expect(ref.instance.appBinding).toEqual('BoundValue');
           async.done();
         });
       }));

    it('should avoid cyclic dependencies when root component requires Lifecycle through DI',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         var refPromise = bootstrap(HelloRootCmp4, testProviders);

         refPromise.then((ref) => {
           expect(ref.instance.appRef).toBe(ref.injector.get(ApplicationRef));
           async.done();
         });
       }));

    it('should run platform initializers', inject([Log], (log: Log) => {
         let p = createPlatform(ReflectiveInjector.resolveAndCreate([
           BROWSER_PLATFORM_PROVIDERS,
           {provide: PLATFORM_INITIALIZER, useValue: log.fn('platform_init1'), multi: true},
           {provide: PLATFORM_INITIALIZER, useValue: log.fn('platform_init2'), multi: true}
         ]));
         expect(log.result()).toEqual('platform_init1; platform_init2');
         log.clear();
         var a = ReflectiveInjector.resolveAndCreate(
             [
               BROWSER_APP_PROVIDERS,
               {provide: APP_INITIALIZER, useValue: log.fn('app_init1'), multi: true},
               {provide: APP_INITIALIZER, useValue: log.fn('app_init2'), multi: true}
             ],
             p.injector);
         a.get(ApplicationRef);

         expect(log.result()).toEqual('app_init1; app_init2');
       }));

    it('should register each application with the testability registry',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         var refPromise1: Promise<ComponentRef<any>> = bootstrap(HelloRootCmp, testProviders);
         var refPromise2: Promise<ComponentRef<any>> = bootstrap(HelloRootCmp2, testProviders);

         PromiseWrapper.all([refPromise1, refPromise2]).then((refs: ComponentRef<any>[]) => {
           var registry = refs[0].injector.get(TestabilityRegistry);
           var testabilities =
               [refs[0].injector.get(Testability), refs[1].injector.get(Testability)];
           PromiseWrapper.all(testabilities).then((testabilities: Testability[]) => {
             expect(registry.findTestabilityInTree(el)).toEqual(testabilities[0]);
             expect(registry.findTestabilityInTree(el2)).toEqual(testabilities[1]);
             async.done();
           });
         });
       }));

    // Note: This will soon be deprecated as bootstrap creates a separate injector for the compiler,
    // i.e. such providers needs to go into that injecotr (when calling `browserCompiler`);
    it('should still allow to provide a custom xhr via the regular providers',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         let spyXhr: XHR = {get: (url: string) => Promise.resolve('{{greeting}} world!')};
         bootstrap(HelloUrlCmp, testProviders.concat([{provide: XHR, useValue: spyXhr}]))
             .then((compRef) => {
               expect(el).toHaveText('hello world!');
               async.done();
             });
       }));

    // Note: This will soon be deprecated as bootstrap creates a separate injector for the compiler,
    // i.e. such providers needs to go into that injecotr (when calling `browserCompiler`);
    it('should still allow to provide platform directives/pipes via the regular providers',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         bootstrap(HelloCmpUsingPlatformDirectiveAndPipe, testProviders.concat([
           {provide: PLATFORM_DIRECTIVES, useValue: [NgIf]},
           {provide: PLATFORM_PIPES, useValue: [LowerCasePipe]}
         ])).then((compRef) => {
           let compFixture = new ComponentFixture(compRef, null, null);
           let el = compFixture.debugElement;
           // Test that ngIf works
           expect(el.children.length).toBe(1);
           compFixture.componentInstance.show = true;
           compFixture.detectChanges();
           expect(el.children.length).toBe(2);

           // Test that lowercase pipe works
           expect(el.children[0].properties['title']).toBe('hello');
           async.done();
         });
       }));

  });
}