我想实际检查一下,选中的属性是使用true而非undefined呈现的。
我的工作(手动测试)组件功能:
export class PlayerSelectorComponent implements OnInit {
players: any = []
...
toggleSelectPlayer( player: any ) {
if (player.selected) {
player.selected = false
}
else {
player.selected = true
}
}
}
以下是模板:
<ul class="list-group">
<player-row *ngFor="let player of players"
[player]="player"
[selected]="player.selected"
(click) = "toggleSelectPlayer(player)">
</player-row>
</ul>
这是测试代码:
it( 'should render a player as selected after a user clicks on the player row', fakeAsync( () => {
let player = fixture.debugElement.query( By.css( '.player-row' ) )
expect( player.attributes.selected ).toBe( undefined )
player.triggerEventHandler( 'click', null )
tick()
fixture.detectChanges()
player = fixture.debugElement.query( By.css( '.player-row' ) )
expect( player.attributes.selected ).toBeTruthy() // Expected undefined to be truthy
} ) )
在代码的最后一行,你可以看到,我的测试没有检测到click.attributes.selected在点击后实际发生了变化。它仍然未定义..
答案 0 :(得分:1)
问题是你在查询css,但实际上并没有在你发布的任何内容中操纵css。您希望将组件变量测试为true
。
在您fixture.detectChanges()
后,您将要expect( component.player.selected ).toBeTruthy()
。假设您有一个TestBed用于测试。
如果您希望在引导程序表单组中实际检查“已激活”状态(未选中),则需要在* ngFor循环中应用[ngClass]="{'selected':player.selected}"
。