预期间谍 toggleStyle 在调用函数时被调用

Question

我正在使用茉莉花测试。我有这个功能： style: string; toggleStyle(style: string, version: string) {    this.style = `mapbox://styles/mapbox/${style}-${version}`;  }和模板： <div class="map-menu-item" (click)="toggleStyle('outdoors', 'v11')" [state]="[true]" menuItemToggle>        <span>          <fa-icon [icon]="faMountain" size="sm" class="pr-2"></fa-icon>Outdoors        </span>      </div>所以我有这个单元测试功能： fit('Should mapbox style when user click on icon', () => {    spyOn(component, 'toggleStyle').and.callThrough();    fixture.debugElement.query(By.css('.map-menu-item')).nativeElement.click();    fixture.detectChanges();    expect(component.toggleStyle).toHaveBeenCalled();  });所以我调用函数：toggleStyle但我仍然收到此错误：Expected spy toggleStyle to have been called.当然，我用谷歌搜索了这个错误。但是我做了一个 callThrough 并调用了函数。那么我必须改变什么？

Answer 1

选择器选择它匹配的第一个元素，所以你的选择器匹配这个元素：

<div class="map-menu-item" (click)="toggleLayer('amsterdam')" [state]="[true]" menuItemToggle>

        <span>

          <fa-icon [icon]="faVideo" size="sm" class="pr-2"></fa-icon>CityHeat

        </span>

      </div>

单击处理程序调用的位置toggleLayer。

将您的 HTML 更改为更具体：

<div class="d-flex flex-column justify-content-start map-menu somethingMoreSpecific">

      <span class="map-menu-header">Layer</span>

      <div class="map-menu-item" (click)="toggleStyle('light', 'v10')" [state]="[true]" menuItemToggle>

        <span>

          <fa-icon [icon]="faAdjust" size="sm" flip="horizontal" class="pr-2"></fa-icon>Light

        </span>

      </div>     

      <div class="map-menu-item" (click)="toggleStyle('outdoors', 'v11')" [state]="[true]" menuItemToggle>

        <span>

          <fa-icon [icon]="faMountain" size="sm" class="pr-2"></fa-icon>Outdoors

        </span>

      </div>

      <div class="map-menu-item" (click)="toggleStyle('satellite', 'v9')" [state]="[true]" menuItemToggle>

        <span>

          <fa-icon [icon]="faSatellite" size="sm" class="pr-2"></fa-icon>Satellite

        </span>

      </div>

    </div>

fit('Should mapbox style when user click on icon', () => {

    spyOn(component, 'toggleStyle').and.callThrough();

    fixture.debugElement.query(By.css('.somethingMoreSpecific .map-menu-item')).nativeElement.click(); // change the selector to select the correct div

    fixture.detectChanges();

    expect(component.toggleStyle).toHaveBeenCalled();

  });