Unit testing jasmine serivce函数不返回模拟值

我第一次从事角度测试，从monring开始，我一直在努力测试。我在TestBed和injected中添加了这两个模块，但始终调用real方法，而不是从

getMockFeatureState（）

返回值。请帮忙解决这个问题。坦克斯

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [ HttpClientModule ],
      providers: [ FeatureToggleService, ConfigService]
    });
  });

  it('should return values based on mock feature state', () => {
    const featureService = TestBed.inject(FeatureToggleService);
    const configService = TestBed.inject(ConfigService);
    const mockFeaturesSpy = spyOn(configService, 'getMockFeatures')
        .and.returnValue(getMockFeatureState());
    expect(featureService.isFeatureEnabled('feature1')).toBeFalsy();
    expect(featureService.isFeatureEnabled('feature2')).toBeFalsy();
  });

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我最近在一次测试中遇到了同样的问题。问题在于

TestBed.inject

的顺序。如果FeatureToggleService需要配置服务。您必须首先注入ConfigService并在注入featureService之前模拟它。你可以试试

  it('should return values based on mock feature state', () => {
    const configService = TestBed.inject(ConfigService);
    const mockFeaturesSpy = spyOn(configService, 'getMockFeatures')
        .and.returnValue(getMockFeatureState());
    const featureService = TestBed.inject(FeatureToggleService);
    expect(featureService.isFeatureEnabled('feature1')).toBeFalsy();
    expect(featureService.isFeatureEnabled('feature2')).toBeFalsy();
  });

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我还将依赖项服务的注入移动到beforeach块中，如其他答案中所述，以便它也可以应用于其他测试。非常感谢。