I need to test this, but I’m new testing and I do not have idea, I’m working with angular, I just want to test the close function and maybe if it renders.
This is the html.
<div class="modal active" *ngIf="active" id="modal"> <div class="modal-dialog modal-lg" role="document"> <div class="modal-content"> <div class="modal-header"> <h1 class="modal-title">{{tittle}}</h1> <button type="button" class="close" (click)="close()"> <span aria-hidden="true">×</span> </button> </div> <div class="modal-body"> <ng-content select="[modal-body]"></ng-content> <div modal-body> <h5 class="modal-description">{{description}}</h5> </div> </div> <div class="modal-footer"> <ng-content select="[modal-footer]"></ng-content> <button type="button" class="btn btn-secondary" (click)="close()">Close</button> </div> </div> </div> <div class="modal-background" (click)="close()"></div> </div>
And this is the modal.component.ts
import { Component, Input, Output, EventEmitter } from '@angular/core'; @Component({ selector: 'app-modal', templateUrl: './modal.component.html', styleUrls: ['./modal.component.css'] }) export class ModalComponent { @Input() tittle: string = '' @Input() description: string = '' @Input() active: boolean = false; @Output() activeChange = new EventEmitter<boolean>(); close() { this.active = false; this.activeChange.emit(this.active); } }
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Answer
In order to test if EventEmitter
emits an event when clicking on background div
, you should write a test using spyOn
like this:
it('should emit event for closing a modal on click event on background div', () => { spyOn(component.activeChange, 'emit'); component.close(); expect(component.activeChange.emit).toHaveBeenCalled(); });
Make sure you have access to component
, by having these lines in beforeEach
block:
beforeEach(() => { fixture = TestBed.createComponent(ModalComponent); component = fixture.componentInstance; fixture.detectChanges(); });