角度运行单元测试

Question

我正在为角度应用程序运行单元测试。我希望ng init被调用

Component.ts：

ngOnInit() {
    this.topToolBarService.change.subscribe(customer => {
      this.filter.customerid = customer;
      this.customerid = customer;
      this.getData();
    });

service.ts

@Output() change: EventEmitter<boolean> = new EventEmitter();

sendCustomer(customer) {
    this.customer = customer;
    this.change.emit(customer);
}

实际测试：

it('should call ngonint',()=>{
    mockService.createSpyObj();
    mockService.change = of("0LPT_id0306");
    fixture.detectChanges();
    expect(fixture.componentInstance.ngOnInit).toHaveBeenCalled();
  })

  

预期：测试通过； Actual：TypeError：无法读取未定义的属性'createSpyObj'

Answer 1

错误： Actual:TypeError: Cannot read property 'createSpyObj' of undefined说，模拟服务未定义。因此测试尚未完成。