如何讓我的Angular5 spyOn按預期工作？

Question

我的測試沒有檢測到變化。 這是我的組件：

  toggleUploadModal() {
    const modalRef = this.ngbModal.open(UploadFilesComponent, { size: 'lg', backdrop: 'static' });
    modalRef.componentInstance.DeliverableTransaction = this.transactionDetails;
    modalRef.result.then((res) => {
      if (res.status === 'success') {
        this.deliverableTransactionService.updateDeliverableTransaction(this.route.snapshot.params.id, {
          submissionStatus: 'In Process'
        })
      }
      setTimeout(() => {
        this.uploadStatus = {};
      }, 5000);
    })
  }

我的測試有：

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [TransactionFileViewer, NgxPermissionsAllowStubDirective],
      providers: [...],
      imports: [...],
      schemas: [
        NO_ERRORS_SCHEMA, CUSTOM_ELEMENTS_SCHEMA
      ],
    })
      .compileComponents();
    fixture = TestBed.createComponent(TransactionFileViewer);
    downloadService = TestBed.get(DownloadService);
    component = fixture.componentInstance;
    fixture.detectChanges();
    submissionFileService = TestBed.get(SubmissionFileService);
    deliverableDefinitionService = TestBed.get(DeliverableDefinitionService);
    service = TestBed.get(DeliverableDefinitionDetailViewService);
    deliverableTransactionService = TestBed.get(DeliverableTransactionService);
    modalService = TestBed.get(NgbModal);
    flashMessagesService = TestBed.get(FlashMessagesService);
  }));
  fit('should update the submissionStatus upon file upload', () => {
    spyOn(modalService, 'open').and.returnValue({
      componentInstance: {},
      result: Promise.resolve({
        uploadedFileCount: 5,
        status: 'success'
      })
    });
    spyOn(deliverableTransactionService, 'updateDeliverableTransaction').and.returnValue(true);

    component.toggleUploadModal();
    expect(deliverableTransactionService.updateDeliverableTransaction).toHaveBeenCalledWith(1, {
      submissionStatus: 'In Process'
    });
  })

但是，在測試中永遠不會調用updateDeliverableTransaction 。 我究竟做錯了什么？ 我假設我需要以某種方式將范圍綁定到result ，但我不確定如何。 如果重要的話，我正在使用bluebird 。

Answer 1

updateDeliverableTransaction方法不會調用因為它成功回調模態。 您需要在方法調用后添加fixture.detectChanges() 。

試試這個

fit('should update the submissionStatus upon file upload', () => {
    spyOn(modalService, 'open').and.returnValue({
      componentInstance: {},
      result: Promise.resolve({
        uploadedFileCount: 5,
        status: 'success'
      })
    });
    spyOn(deliverableTransactionService, 'updateDeliverableTransaction').and.returnValue(true);

    component.toggleUploadModal();
    fixture.detectChanges();
    expect(deliverableTransactionService.updateDeliverableTransaction).toHaveBeenCalledWith(1, {
      submissionStatus: 'In Process'
    });
  })