未涵盖构造函数上的分支

问题描述

我正在使用 Jasmine 创建我的单元测试，我对所涵盖的分支有疑问.

有谁知道为什么代码部分显示没有覆盖分支，如下所示?

这是单元测试:

describe('MyComponent', () => {让组件:我的组件；让fixture: ComponentFixture;让我的服务:我的服务；beforeEach(异步(() => {TestBed.configureTestingModule({声明:[我的组件]，进口:[ MaterializeModule, FormsModule, ReactiveFormsModule, HttpModule ],提供者:[我的服务，表单生成器]}).compileComponents();}));beforeEach(() => {夹具 = TestBed.createComponent(MyComponent);组件=fixture.componentInstance；slotService = TestBed.get(MyService);夹具.detectChanges();});功能更新表格(姓名，姓氏){component.myForm.controls['name'].setValue(name);component.myForm.controls['surname'].setValue(name);}it('应该创建', () => {期望(组件).toBeTruthy()；});}

解决方案

从我将项目升级到 Angular 4 的那一刻起，几个月来我一直遇到同样的问题.不幸的是，这是 angular-cli 版本 1 和角度 4.

此错误已记录在

I am creating my unit tests with Jasmine and I have a question about the branch covered.

Does anyone know why the code part shows that the branches are not covered as we can see below?

This is the unit test:

describe('MyComponent', () => {
  let component: MyComponent;
  let fixture: ComponentFixture<MyComponent>;
  let myService: MyService;

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ MyComponent ],
      imports: [ MaterializeModule, FormsModule, ReactiveFormsModule, HttpModule ],
      providers: [
        MyService,
        FormBuilder
      ]
    })
    .compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(MyComponent);
    component = fixture.componentInstance;
    slotsService = TestBed.get(MyService);
    fixture.detectChanges();
  });

  function updateForm(name, surname) {
    component.myForm.controls['name'].setValue(name);
    component.myForm.controls['surname'].setValue(name);
  }

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

解决方案

I've had the same issue for months from the moment I upgraded my projects to angular 4. Unfortunately it is a bug with the angular-cli version 1 and angular 4.

This bug is already logged in the angular-cli project: Test-coverage says that coverage is not 100%, but it truly is! #5871. Unfortunately at the moment, this issue is still open.

This is a snapshot from that logged issue, which matches the one you are asking about:

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