Question

我正在尝试设置@Injectable存储服务的测试。

@Injectable()
export class StorageService {...

constructor(private platform: Platform,
  public instanceService: InstanceService,
  private logger: LoggingService,
  private database: SQLite = null) {... //injecting a db mock

我已经创建了几个成功的测试版本，但我知道它们只是成功，因为它们是异步的并且误报了错误。

这是设置。

describe('Storage Service tests', () => {
beforeEach(async(() => {
    TestBed.configureTestingModule({
        declarations: [],
        providers: [
            StorageService,
            { provide: Platform, useClass: PlatformMock },
            { provide: InstanceService, useClass: InstanceServiceMock },
            { provide: LoggingService, useClass: LoggingServiceMock },
            { provide: ConfigurationService, useClass: ConfigurationServiceMock },
            { provide: SQLite, useClass: DBMock },
            MockBackend,
            BaseRequestOptions,
            {
                provide: Http,
                useFactory: (mockBackend, options) => {
                    return new Http(mockBackend, options);
                },
                deps: [MockBackend, BaseRequestOptions]
            }
        ],
        imports: [
            HttpModule
        ]
    }).compileComponents();
}));

我正在尝试测试setFailedImageUpdate

我很难知道如何同时注入服务，因此它初始化和传递done以进行异步完成。

it('should set failed image', (done) => {
    let cu = new UnsavedImageUpdate();

    inject([StorageService, MockBackend], (storageService, mockBackend) => {
        storageService.db = new DBMock();
        storageService.setFailedImageUpdate([cu]).then((res) => {
            expect(res).toEqual("1234");
            done();
        })();
    })
});

我在这次迭代中遇到的错误是：

Error: Timeout - Async callback was not invoked within timeout
specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.

如何设置我的测试以同时注入StorageService 和传入done？

编辑：试着按照@学习者的建议，我创建了这个：

it('should set failed image', async() => {
    let cu = new UnsavedImageUpdate();
    var storageService = TestBed.get(StorageService);
    storageService.db = new DBMock();
    storageService.setFailedImageUpdate([cu]).then((res) => {
        expect(res).toEqual("1234");
    })
});

测试成功，但是当我调试它时，我收到了这个错误：

'expect' was used when there was no current spec, 
this could be because an asynchronous test timed out

Answer 1

您可以使用inject在测试方法中获取注入的服务，而不是使用TestBed.get(StorageService)，您可以使用角度测试模块中的async函数来等待异步操作完成而不是使用done。

像这样使用：

it('should set failed image', (done) => {
    let cu = new UnsavedImageUpdate();
    var storageService = TestBed.get(StorageService);
    storageService.db = new DBMock();
    storageService.setFailedImageUpdate([cu]).then((res) => {
        expect(res).toEqual("1234");
        done();
    })
});

测试异步可注射服务

1 个答案: