Angular 角度单元测试-无功形式值未更新
我不熟悉角度单元测试。 测试场景:html中的表单视图值等于组件表单值。 电子邮件值由共享值检索,并在组件注册表单中使用。我可以使用反应式表单从组件中检索电子邮件值,但是当尝试通过本机元素访问时,它会给出空值。 下面是component.tsAngular 角度单元测试-无功形式值未更新,angular,unit-testing,karma-jasmine,angular-reactive-forms,Angular,Unit Testing,Karma Jasmine,Angular Reactive Forms,我不熟悉角度单元测试。 测试场景:html中的表单视图值等于组件表单值。 电子邮件值由共享值检索,并在组件注册表单中使用。我可以使用反应式表单从组件中检索电子邮件值,但是当尝试通过本机元素访问时,它会给出空值。 下面是component.ts ngOnit(public serviceEmail) { this.assignEmailAvailable(); this.createRegistration(); } assignEmailAvailable() { i
ngOnit(public serviceEmail) {
this.assignEmailAvailable();
this.createRegistration();
}
assignEmailAvailable() {
if(service.email){
this.email = serviceEmail.email;
}
}
createRegistration() {
this.registerForm = new FormGroup({
email:new FormControl({value:this.email})
})
}
在component.spec.ts中,我将调用此函数并检查两个值是否相同。
组件规范ts
beforeEach(() => {
fixture = TestBed.createComponent(RegisterComponent);
component = fixture.componentInstance;
service = TestBed.get(serviceEmail);
});
it('Registration Form Creation', fakeAsync(() => {
service.email = "dsf@gmail.com";
fixture.detectChanges();
component.assignEmailAvailable();
component.createRegisterForm();
fixture.detectChanges();
fixture.whenStable().then(() => {
const email = fixture.debugElement.query(By.css('input[id="email"]')).nativeElement;
//The value is empty even after creating the form using the component function
expect(email.value).toBe(component.emailValue);
});
//THis returns me the value set
expect(component.registerForm.get('email').value).toBe(component.emailValue);
}));
我花了两个小时试图解决这个问题。根据我的经验,beforeach()函数中有一些问题需要解决。首先,您需要将ReactiveFormsModule导入到您的测试床中,以便更改检测能够正确地执行所有操作。其次,需要在beforeach()调用中手动运行ngOnInit()和fixture.detectChanges()来设置表单。请参见下面的beforeach()函数。我还包括了其他有此问题的人可能会觉得相关的代码的其余部分 组件模板:
<form [formGroup]='emailForm' (ngSubmit)='handleSubmit()'>
<div class='form-group'>
<label for='email'>Email address</label>
<input type='email' class='form-control' id='email' placeholder='Enter email'
formControlName='email'>
规范TS中的beforeach()调用都是:
beforeEach(
async(() => {
apiServiceSpy = jasmine.createSpyObj('ApiService', ['sendResetPasswordEmail']);
routerSpy = jasmine.createSpyObj('Router', ['navigateByUrl']);
TestBed.configureTestingModule({
declarations: [ SendPasswordResetEmailComponent ],
// Need to import this if we're messing with Reactive Form inputs!!
imports: [ReactiveFormsModule],
providers: [
{provide: ApiService, useValue: apiServiceSpy},
{provide: Router, useValue: routerSpy},
{provide: FormBuilder},
]
})
.compileComponents();
})
);
beforeEach(() => {
fixture = TestBed.createComponent(SendPasswordResetEmailComponent);
component = fixture.componentInstance;
// ngOnInit() doesn't get called automatically, so we have to do it ourselves
component.ngOnInit();
// Telling the fixture to detect changes is really important to correctly bind data
// Do this after calling ngOnInit() so changes propagate to the template
fixture.detectChanges();
});
样本测试规格:
it('should have an error for no username', () => {
const componentElement: HTMLElement = fixture.nativeElement;
const emailInput: HTMLInputElement = componentElement.querySelector('input');
emailInput.value = '@gmail.com';
emailInput.dispatchEvent(new Event('input'));
fixture.detectChanges();
expect(component.email.errors.email).toBeTruthy('@gmail.com valid');
});
it('should have no error if the email is valid', () => {
const componentElement: HTMLElement = fixture.nativeElement;
const emailInput: HTMLInputElement = componentElement.querySelector('input');
emailInput.value = 'joe@test.go';
emailInput.dispatchEvent(new Event('input'));
fixture.detectChanges();
expect(component.email.errors).toBeFalsy('joe@test.go invalid');
});
在表单控件初始化中,是否应该使用
this.email
来代替,例如新表单控件(this.email)
?嘿,我纠正了一个打字错误。导入表单模块和反应表单模块解决了我的问题
it('should have an error for no username', () => {
const componentElement: HTMLElement = fixture.nativeElement;
const emailInput: HTMLInputElement = componentElement.querySelector('input');
emailInput.value = '@gmail.com';
emailInput.dispatchEvent(new Event('input'));
fixture.detectChanges();
expect(component.email.errors.email).toBeTruthy('@gmail.com valid');
});
it('should have no error if the email is valid', () => {
const componentElement: HTMLElement = fixture.nativeElement;
const emailInput: HTMLInputElement = componentElement.querySelector('input');
emailInput.value = 'joe@test.go';
emailInput.dispatchEvent(new Event('input'));
fixture.detectChanges();
expect(component.email.errors).toBeFalsy('joe@test.go invalid');
});