相关疑难解决方法(0)

假设我有一个订阅服务功能的组件:

export class Component {

   ...

    ngOnInit() {
        this.service.doStuff().subscribe(
            (data: IData) => {
              doThings(data);
            },
            (error: Error) => console.error(error)
        );
    };
};

订阅调用将两个匿名函数作为参数,我已设法为数据函数设置工作单元测试,但Karma不接受错误一的覆盖.

我已经尝试过监视console.error函数,抛出一个错误,然后期待调用间谍已被调用,但这并没有完全做到.

我的单元测试:

spyOn(console,'error').and.callThrough();

serviceStub = {
        doStuff: jasmine.createSpy('doStuff').and.returnValue(Observable.of(data)),
    };

    serviceStub.doStuff.and.returnValue(Observable.throw(

        'error!'
    ));

serviceStub.doStuff().subscribe(

    (res) => {

        *working test, can access res*
    },
    (error) => {

      console.error(error);
      console.log(error);  //Prints 'error!' so throw works.
      expect(console.error).toHaveBeenCalledWith('error!'); //Is true but won't be accepted for coverage.
    }
);

测试这些匿名函数的最佳实践是什么？确保测试覆盖率的最低要求是什么？

我有一个简单的组件,它在一个form元素中包含两个输入字段.单击提交按钮,它将调用addUser组件上的函数.

组件模板如下:

<div>
  <form [formGroup]="signupForm" (submit)="addUser($event)" role="form" class="form-horizontal">
      <label>Firstname:</label>
      <input type="text" formControlName="firstName"> 
      <label>Lastname:</label>
      <input type="text" formControlName="lastName">
      <input type="submit" id="btnSubmit" class="btn btn-primary btn-lg" value="Register" />
  </form>
</div>

组件定义如下:

@Component({
  moduleId: module.id,  
  templateUrl: 'user.component.html'  
})
export class UserComponent {

  registered = false;

  constructor(
    private router: Router,
    private fb: FormBuilder,
    public authService: AuthService) {

      this.signupForm = this.fb.group({
            'firstName': ['', Validators.required],
            'lastName': ['', Validators.required]
        });        
  }

  addUser(event: any) {
      event.preventDefault();
      this.addUserInvoked = true;
      ......
      ......
      this.authService.register(this.signupForm.value)
        .subscribe(
        (res: Response) => …