Angular 角度集成测试:如何在MouseEvent上指定目标
在集成测试中,我试图通过对其中一个HTML元素使用“triggerEventHandler”来调用click事件。我希望事件的“target”属性由“triggerEventHandler”设置。这并没有发生。当我执行测试时,控制台中会记录以下错误:“无法读取null的属性“tagName”,当我尝试获取目标元素的标记名时会发生这种情况 我应该如何实现这个测试 看法 规格Angular 角度集成测试:如何在MouseEvent上指定目标,angular,angular-test,Angular,Angular Test,在集成测试中,我试图通过对其中一个HTML元素使用“triggerEventHandler”来调用click事件。我希望事件的“target”属性由“triggerEventHandler”设置。这并没有发生。当我执行测试时,控制台中会记录以下错误:“无法读取null的属性“tagName”,当我尝试获取目标元素的标记名时会发生这种情况 我应该如何实现这个测试 看法 规格 从'@angular/core/testing'导入{async,ComponentFixture,TestBed}; 从“
从'@angular/core/testing'导入{async,ComponentFixture,TestBed};
从“@angular/platform browser”导入{By}”
从“./biq dbg.component”导入{biqdbgponent};
fdescribe('BiqDbgComponent',()=>{
let组件:biqdbg组件;
let夹具:组件夹具;
beforeach(异步(()=>{
TestBed.configureTestingModule({
声明:[BIQDBG组件]
})
.compileComponents();
}));
在每个之前(()=>{
fixture=TestBed.createComponent(BiqDbgComponent);
组件=fixture.componentInstance;
fixture.detectChanges();
});
它('应该创建',()=>{
expect(component.toBeTruthy();
});
它('h1应该对点击作出反应',()=>{
设h1=fixture.debugElement.query(By.css(“.h1类”);
让mouseEvent:mouseEvent=newmouseevent(“单击“,{clientX:10,clientY:20,按钮:0}”);
h1.触发EventHandler(“单击”,鼠标事件);
fixture.detectChanges();
})
拟合('h1应对右键单击作出反应',()=>{
设h1=fixture.debugElement.query(By.css(“.h1类”);
让mouseEvent:mouseEvent=newmouseevent(“contextmenu”,{clientX:10,clientY:20,button:2});
h1.triggerEventHandler(“上下文菜单”,MouseeEvent);
fixture.detectChanges();
})
});
“triggerEventHandler”,只需调用给定事件名的所有侦听器
为了模拟真实事件,如鼠标单击或鼠标右键单击,您必须使用“dispatchEvent(event)”:。“triggerEventHandler”,所做的只是调用给定事件名称的所有侦听器
为了模拟真实事件,如鼠标单击或鼠标右键单击,您必须使用“dispatchEvent(event)”:
<h1 class="h1-class" (click)="click($event)" (contextmenu)="rightClick($event)">H1</h1>
<h2 class="h2-class" (click)="click($event)" (contextmenu)="rightClick($event)">H2</h2>
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'biq-dbg',
templateUrl: './biq-dbg.component.html',
styleUrls: ['./biq-dbg.component.less']
})
export class BiqDbgComponent implements OnInit {
constructor() {
}
ngOnInit() {
}
click(event: MouseEvent) {
console.log(event);
let targetElement = event.target as HTMLElement;
if (targetElement.tagName.toLocaleLowerCase() == "h1")
console.log("H1 was clicked");
if (targetElement.tagName.toLocaleLowerCase() == "h2")
console.log("H2 was clicked");
}
rightClick(event: MouseEvent) {
console.log(event);
let targetElement = event.target as HTMLElement;
if (targetElement.tagName.toLocaleLowerCase() == "h1")
console.log("H1 was right-clicked");
if (targetElement.tagName.toLocaleLowerCase() == "h2")
console.log("H2 was right-clicked");
}
}
import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { By } from '@angular/platform-browser'
import { BiqDbgComponent } from './biq-dbg.component';
fdescribe('BiqDbgComponent', () => {
let component: BiqDbgComponent;
let fixture: ComponentFixture<BiqDbgComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [ BiqDbgComponent ]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(BiqDbgComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
it('h1 should react to click', () => {
let h1 = fixture.debugElement.query(By.css(".h1-class"));
let mouseEvent: MouseEvent = new MouseEvent("click", { clientX: 10, clientY: 20, button: 0});
h1.triggerEventHandler("click", mouseEvent);
fixture.detectChanges();
})
fit('h1 should react to right-click', () => {
let h1 = fixture.debugElement.query(By.css(".h1-class"));
let mouseEvent: MouseEvent = new MouseEvent("contextmenu", { clientX: 10, clientY: 20, button: 2});
h1.triggerEventHandler("contextmenu", mouseEvent);
fixture.detectChanges();
})
});