angular-docs-cn/modules/angular2/test/core/application_spec.js

import {describe, ddescribe, it, iit, xit, xdescribe, expect, beforeEach} from 'angular2/test_lib';
import {bootstrap, appDocumentToken, appElementToken}
    from 'angular2/src/core/application';
import {Component} from 'angular2/src/core/annotations/annotations';
import {DOM} from 'angular2/src/dom/dom_adapter';
import {ListWrapper} from 'angular2/src/facade/collection';
import {PromiseWrapper} from 'angular2/src/facade/async';
import {bind, Inject} from 'angular2/di';
import {Template} from 'angular2/src/core/annotations/template';
import {LifeCycle} from 'angular2/src/core/life_cycle/life_cycle';

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

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

@Component({selector: 'hello-app'})
@Template({inline: ''})
class HelloRootCmp3 {
  appBinding;

  constructor(@Inject("appBinding") appBinding) {
    this.appBinding = appBinding;
  }
}

@Component({selector: 'hello-app'})
@Template({inline: ''})
class HelloRootCmp4 {
  lc;

  constructor(@Inject(LifeCycle) lc) {
    this.lc = lc;
  }
}

export function main() {
  var fakeDoc, el, el2, testBindings;

  beforeEach(() => {
    fakeDoc = DOM.createHtmlDocument();
    el = DOM.createElement('hello-app', fakeDoc);
    el2 = DOM.createElement('hello-app-2', fakeDoc);
    DOM.appendChild(fakeDoc.body, el);
    DOM.appendChild(fakeDoc.body, el2);
    testBindings = [bind(appDocumentToken).toValue(fakeDoc)];
  });

  describe('bootstrap factory method', () => {
    it('should throw if no element is found', (done) => {
      var injectorPromise = bootstrap(HelloRootCmp, [], (e,t) => {throw e;});
      PromiseWrapper.then(injectorPromise, null, (reason) => {
        expect(reason.message).toContain(
            'The app selector "hello-app" did not match any elements');
        done();
      });
    });

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

    it('should resolve an injector promise and contain bindings', (done) => {
      var injectorPromise = bootstrap(HelloRootCmp, testBindings);
      injectorPromise.then((injector) => {
        expect(injector.get(appElementToken)).toBe(el);
        done();
      });
    });

    it('should provide the application component in the injector', (done) => {
      var injectorPromise = bootstrap(HelloRootCmp, testBindings);
      injectorPromise.then((injector) => {
        expect(injector.get(HelloRootCmp)).toBeAnInstanceOf(HelloRootCmp);
        done();
      });
    });

    it('should display hello world', (done) => {
      var injectorPromise = bootstrap(HelloRootCmp, testBindings);
      injectorPromise.then((injector) => {
        expect(injector.get(appElementToken)
            .shadowRoot.childNodes[0].nodeValue).toEqual('hello world!');
        done();
      });
    });

    it('should support multiple calls to bootstrap', (done) => {
      var injectorPromise1 = bootstrap(HelloRootCmp, testBindings);
      var injectorPromise2 = bootstrap(HelloRootCmp2, testBindings);
      PromiseWrapper.all([injectorPromise1, injectorPromise2]).then((injectors) => {
        expect(injectors[0].get(appElementToken)
            .shadowRoot.childNodes[0].nodeValue).toEqual('hello world!');
        expect(injectors[1].get(appElementToken)
            .shadowRoot.childNodes[0].nodeValue).toEqual('hello world, again!');
        done();
      });
    });

    it("should make the provided bindings available to the application component", (done) => {
      var injectorPromise = bootstrap(HelloRootCmp3, [
        testBindings,
        bind("appBinding").toValue("BoundValue")
      ]);

      injectorPromise.then((injector) => {
        expect(injector.get(HelloRootCmp3).appBinding).toEqual("BoundValue");
        done();
      });
    });

    it("should avoid cyclic dependencies when root component requires Lifecycle through DI", (done) => {
      var injectorPromise = bootstrap(HelloRootCmp4, testBindings);

      injectorPromise.then((injector) => {
        expect(injector.get(HelloRootCmp4).lc).toBe(injector.get(LifeCycle));
        done();
      });
    });
  });
}