Question

对于单元测试和Angular，我还很陌生，我正在尝试为我的项目编写一些单元测试。

我得到的错误是;

ALTER TABLE public.foo ALTER COLUMN  bar SET DEFAULT NULL

component.spec文件的导入包括

Uncaught TypeError: _this.translate.instant is not a function thrown
Expected null to be truthy.

我了解到beforeEach(async(() => { TestBed.configureTestingModule({ imports:[ ClarityModule, RouterTestingModule, TranslateModule.forRoot({ loader: { provide: TranslateLoader, useFactory: (http: HttpClient) => new TranslateHttpLoader(http, 'assets/i18n/', '.json'), deps: [HttpClient] } }), HttpClientModule ], declarations: [ HeaderComponent, LanguageSelectorComponent ], providers: [ { provide: Store, useClass: TestStore }, { provide: TranslateService, useClass: TranslateServiceStub }, { provide: NGXLogger, useClass: NGXLoggerMock } ] }) .compileComponents(); }));不包含“即时”功能。这是此错误的原因吗？如果是这样，我该如何模拟translate.instant函数？

或者在调用即时方法之前，有什么方法可以将翻译文件加载到规范文件中吗？

任何建议都会大有帮助。非常感谢！

Answer 1

根据documentation link，instant的返回类型为string或Object。

instant(key: string|Array<string>, interpolateParams?: Object): string|Object

export class TranslateServiceStub {
    instant(): string{
      // or put some logic to return Mock data as per the passed value from component
      //  (if being used at multiple places in the component)
      return "some_string";
    }
}

类似地，如果需要，您可以返回Object。

ngx-translate立即函数不是抛出的函数：单元测试

1 个答案: