angular-docs-cn/modules/@angular/language-service/test/template_references_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 * as ts from 'typescript';

import {createLanguageService} from '../src/language_service';
import {Completions, Diagnostic, Diagnostics, LanguageService} from '../src/types';
import {TypeScriptServiceHost} from '../src/typescript_host';

import {toh} from './test_data';
import {MockTypescriptHost} from './test_utils';

describe('references', () => {
  let documentRegistry = ts.createDocumentRegistry();
  let mockHost: MockTypescriptHost;
  let service: ts.LanguageService;
  let program: ts.Program;
  let ngHost: TypeScriptServiceHost;
  let ngService: LanguageService = createLanguageService(ngHost);

  beforeEach(() => {
    mockHost = new MockTypescriptHost(['/app/main.ts', '/app/parsing-cases.ts'], toh);
    service = ts.createLanguageService(mockHost, documentRegistry);
    program = service.getProgram();
    ngHost = new TypeScriptServiceHost(mockHost, service);
    ngService = createLanguageService(ngHost);
    ngHost.setSite(ngService);
  });

  it('should be able to get template references',
     () => { expect(() => ngService.getTemplateReferences()).not.toThrow(); });

  it('should be able to determine that test.ng is a template reference',
     () => { expect(ngService.getTemplateReferences()).toContain('/app/test.ng'); });

  it('should be able to get template references for an invalid project', () => {
    const moduleCode = `
      import {NgModule} from '@angular/core';
      import {NewClass} from './test.component';

      @NgModule({declarations: [NewClass]}) export class TestModule {}`;
    const classCode = `
      export class NewClass {}

      @Component({})
      export class SomeComponent {}
    `;
    mockHost.addScript('/app/test.module.ts', moduleCode);
    mockHost.addScript('/app/test.component.ts', classCode);
    expect(() => { ngService.getTemplateReferences(); }).not.toThrow();
  });

});