Question

我已经在Angular 6中写了我的第一个角度应用程序。

我还没有编写任何测试，但是在生成components和services时会自动创建一些默认的测试文件。

当我使用来运行自动生成的测试时

ng test

它给出了太多错误。其中一个错误是

ChangeAvatarModalComponent should create

Failed: Template parse errors:
There is no directive with "exportAs" set to "ngForm" ("
<div class="modal-body">

  <form [formGroup]="changeAvatarForm" id="avatar-form" [ERROR ->]#formDir="ngForm" (submit)="onSubmit()">
  <div class="row">
    <div class="col-md-12">
"): ng:///DynamicTestModule/ChangeAvatarModalComponent.html@8:56
Can't bind to 'formGroup' since it isn't a known property of 'form'. ("
<div class="modal-body">

我有一个帐户模块，该模块具有 ChangeAvatarModalComponent 。

我在 account.module.ts

中包含以下几行

@NgModule({
  imports: [
    CommonModule,
    FormsModule,
    ReactiveFormsModule,
    RouterModule.forChild(AccountRoutes),
    NgbModule
  ],
  declarations: [
    ChangeAvatarModalComponent
  ],
  entryComponents: [
    ChangeAvatarModalComponent
  ]
})
export class AccountModule { }

以及FormsModule和ReactiveFormsModule也被导入到 app.module.ts

生成的日志中有很多此类错误。

编辑2：change-avatar-modal.component.spec.ts

import { async, ComponentFixture, TestBed } from '@angular/core/testing';

import { ChangeAvatarModalComponent } from './change-avatar-modal.component';

describe('ChangeAvatarModalComponent', () => {
  let component: ChangeAvatarModalComponent;
  let fixture: ComponentFixture<ChangeAvatarModalComponent>;

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ ChangeAvatarModalComponent ]
    })
    .compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(ChangeAvatarModalComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });
});

Answer 1

您没有在提供的代码中显示.spec.ts文件。

出现表格问题的原因是，在规范文件中，您也需要导入相关模块，如下所示：

describe('ExampleComponent', () => {
  let component: ExampleComponent
  let fixture: ComponentFixture<ExampleComponent>

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [
        RouterTestingModule,
        TranslateModule.forRoot({
          loader: {provide: TranslateLoader, useClass: TranslateFakeLoader}
        }),
        HttpClientModule,
        HttpClientTestingModule,
        FormsModule,
        SfFormModule,
        ReactiveFormsModule,
        NguiAutoCompleteModule,
        NgxMyDatePickerModule,
        NgxPermissionsModule.forRoot(),
        PipeModule,
        StoreModule.forRoot({}),
        LayoutsModule
      ],
      declarations: [
        ExampleComponent
      ],
      providers: [
        {provide: APP_BASE_HREF, useValue: '/'},
        {provide: ToastrService, MockToastrService},
        ActionsSubject,
        SimService
      ]
    }).compileComponents()
  }))

  beforeEach(() => {
    fixture = TestBed.createComponent(ExampleComponent)
    component = fixture.componentInstance
    fixture.detectChanges()
  })

  it('should create', () => {
    expect(component).toBeTruthy()
  })
})

在您的情况下，您需要在spec文件中导入FormsModule和/或ReactiveFormsModule，还可能要介绍其他内容。

为减少导入次数，您只需将自己的模块导入到规范文件中就可以摆脱困境-例如AccountModule和/或AppModule-因为它们已经导入了表单内容。

ng测试给出了组件应创建的

1 个答案: