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);
}
}
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();
});