Angular 中条件数据的 jasmine 测试用例问题

Question

我正在学习用 jasmine 为 angular 应用程序编写测试用例，我的 html 中有一个组件如下

<app-image [imgData]="pageData['configData']['image']"></app-image>

我的测试用例如下

import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { PlainTextPipe } from '@pipes/plain-text.pipe';
import { DataService } from '@services/data.service';

import { BasicComponent } from './basic.component';

fdescribe('BasicComponent', () => {
  let component: BasicComponent;
  let fixture: ComponentFixture<BasicComponent>;
  let pageData;

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [BasicComponent],
      providers: [PlainTextPipe]
    })
      .compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(BasicComponent);
    component = fixture.componentInstance;
    spyOn(component, 'renderPage');

    fixture.detectChanges();
  });


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





  it('should initialize', () => {
    component.ngOnInit();
    fixture.detectChanges();
  });

});

当我运行这个测试用例时，我得到 无法读取属性 'image' of undefined 因为在某些情况下我没有图像我如何在我的测试用例中处理它，因为在特定情况下我将拥有图像，而在其他情况下我不会，因为这是公共组件

Answer 1

问题是 pageData.configData 未定义。

尝试：

it('should create', () => {
    component.pageData.configData.image = 'hello'; // not sure if it's a string but you know how to mock it
    expect(component).toBeTruthy();
  });

Angular 中条件数据的 jasmine 测试用例问题

Issue with jasmine test cases in Angular for conditional data

tdd

jasmine

karma-runner

angular