我在使用 Angular CLI 提供的测试框架设置触发 Angular 单元测试中 md-checkbox 的“更改”事件时遇到问题。
我有一个简单的组件:
ts:
import { Component } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
checkedValue = 'false';
result = false;
checkValueChange(event) {
console.log('CheckBox clicked: ' + event.checked);
this.result = true;
}
}
模板:
<md-checkbox [checked]="true" [(ngModel)]="checkedValue" (change)="checkValueChange($event)">Check Box</md-checkbox>
这是我试图通过模拟点击发出更改事件的单元测试代码:
测试代码:
import {TestBed, async, fakeAsync} from '@angular/core/testing';
import { AppComponent } from './app.component';
import {DebugElement} from '@angular/core';
import {By} from '@angular/platform-browser';
import {MaterialModule} from '@angular/material';
import {FormsModule} from '@angular/forms';
import {tick} from '@angular/core/testing';
let de: DebugElement;
let el: HTMLElement;
describe('AppComponent', () => {
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [
AppComponent
],
imports: [MaterialModule, FormsModule]
}).compileComponents();
}));
it('should create the app', fakeAsync(() => {
const fixture = TestBed.createComponent(AppComponent);
const app = fixture.debugElement.componentInstance;
de = fixture.debugElement.query(By.css('md-checkbox'));
el = de.nativeElement;
// Neither click appears to trigger the change event to occur, or update the model
de.triggerEventHandler('click', {});
el.click();
tick(100);
expect(app.result).toBe(true);
}));
});
那么也许尝试通过点击触发更改事件是不正确的?有人有什么想法吗?
Thanks.