我读了Angular Testing，我不确定是否有关于模态内测试元素的参考以及如何检查自定义动作。我的目的是编写必要的测试表明我将确保我的函数和模态按预期工作。
由于隐藏了模态，检查模态元素是否出现的测试失败。所以我想这里缺少一些东西。
这是我的photos.components.ts文件：
import {Component, OnInit, ViewEncapsulation} from '@angular/core';
import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
@Component({
selector: 'app-photos',
templateUrl: './photos.component.html',
styleUrls: ['./photos.component.scss'],
encapsulation: ViewEncapsulation.None
})
export class PhotosComponent implements OnInit {
constructor(private modalService: NgbModal) { }
openDarkModal(content) {
this.modalService.open(content, { windowClass: 'dark-modal', size: 'lg', centered: true });
}
ngOnInit() {
}
}
这是我的photos.component.html文件：
<div>
<div class="col-lg-4 col-sm-6 mb-3">
<a><img (click)="openDarkModal(content)" id="photo-one" class="img-fluid z-depth-4 relative waves-light" src="#" alt="Image" data-toggle="content" data-target="#content"></a>
</div>
</div>
<!-- Dark Modal -->
<ng-template #content let-modal id="ng-modal">
<div class="modal-header dark-modal">
<img (click)="modal.dismiss('Cross click')" id="modal-image" class="embed-responsive-item img-fluid" src="#" alt="Image" allowfullscreen>
</div>
<div class="justify-content-center flex-column flex-md-row list-inline">
<ul class="list-inline flex-center text-align-center text-decoration-none" id="modal-buttons-list">
<li><a style="color: white;" href="#"><button mdbBtn type="button" size="sm" class="waves-light" color="indigo" mdbWavesEffect><i class="fab fa-facebook-f"></i></button></a></li>
<li><a style="color: white;" href="#"><button mdbBtn type="button" size="sm" class="waves-light" color="cyan" mdbWavesEffect><i class="fab fa-twitter"></i></button></a></li>
<li><a style="color: white;" href="#"><button mdbBtn type="button" size="sm" class="waves-light btn btn-blue-grey" mdbWavesEffect><i class="fas fa-envelope"></i></button></a></li>
</ul>
</div>
</ng-template>
这就是我使用photos.component.spec.ts文件的地方：
import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { PhotosComponent } from './photos.component';
import { NO_ERRORS_SCHEMA } from '@angular/core';
describe('PhotosComponent', () => {
let component: PhotosComponent;
let fixture: ComponentFixture<PhotosComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [ PhotosComponent ],
schemas: [NO_ERRORS_SCHEMA]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(PhotosComponent);
component = fixture.componentInstance;
});
it('should create', () => {
expect(component).toBeTruthy();
});
it('should render the first photo', () => {
const compiled = fixture.debugElement.nativeElement;
expect(compiled.querySelector('#photo-one')).toBeTruthy();
});
});
我需要Dark Modal中元素的测试用例和openDarkModal的测试。除了代码之外，对于初学者的Angular 7测试的参考将不胜感激。
让我帮你解决这个问题。让我们说你有
app.component.html
<div id="title">
{{title}}
</div>
<ng-template #content
let-modal
id="ng-modal">
<div class="modal-header dark-modal">
Header
</div>
<div class="justify-content-center flex-column flex-md-row list-inline">
Body
</div>
</ng-template>
app.component.ts
import { Component, ViewChild, TemplateRef } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css'],
})
export class AppComponent {
title = 'AngularProj';
@ViewChild('content') modalRef: TemplateRef<any>;
}
您需要以稍微不同的方式编写spec文件：
app.component.spec.ts
import { TestBed, async, ComponentFixture } from '@angular/core/testing';
import { AppComponent } from './app.component';
import { ViewChild, Component, OnInit, AfterContentInit, TemplateRef } from '@angular/core';
import { By } from '@angular/platform-browser';
@Component({
template: `
<ng-container *ngTemplateOutlet="modal"> </ng-container>
<app-root></app-root>
`,
})
class WrapperComponent implements AfterContentInit {
@ViewChild(AppComponent) appComponentRef: AppComponent;
modal: TemplateRef<any>;
ngAfterContentInit() {
this.modal = this.appComponentRef.modalRef;
}
}
describe('AppComponent', () => {
let app: AppComponent;
let fixture: ComponentFixture<WrapperComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [WrapperComponent, AppComponent],
}).compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(WrapperComponent);
const wrapperComponent = fixture.debugElement.componentInstance;
app = wrapperComponent.appComponentRef;
fixture.detectChanges();
});
it('should create the app', async(() => {
expect(app).toBeDefined();
}));
it('should have title in HtmL ', async(() => {
const titleText = (fixture.debugElement.nativeElement.querySelector('#title').innerText);
expect(titleText).toBe('AngularProj');
}));
it('should have Header in HtmL ', async(() => {
const headerText = (fixture.debugElement.queryAll(By.css('.modal-header.dark-modal'))[0].nativeElement.innerText);
expect(headerText).toBe('Header');
}));
});
app-root包裹了一个样本测试组件（WrapperComponent）。app-root有ng-template，所以它不会自己呈现。这会产生一个棘手的情况，因为我们需要渲染这部分app.component。ng-template然后使用它来渲染@ViewChild('content') modalRef: TemplateRef<any>;来暴露WrapperComponent。我知道这似乎是一个黑客，但在我经历的所有文章中，我们就是如何实现这一目标的。
用于测试类似于：
openDarkModal(content) {
this.modalService.open(content, { windowClass: 'dark-modal', size: 'lg', centered: true });
}
你可以使用spy，但在此之前使modalService公开，以便它可以被监视：
constructor(public modalService: NgbModal) { }
然后在spec：
import { NgbModalModule } from '@ng-bootstrap/ng-bootstrap';
TestBed.configureTestingModule({
imports: [NgbModalModule],
declarations: [PhotosComponent, /*WrapperComponent*/],
schemas: [NO_ERRORS_SCHEMA],
})
// and in it block
it('should call modal Service open function when clicked ', async(() => {
spyOn(component.modalService,'open').and.callThrough();
const openModalEle= fixture.debugElement.nativeElement.querySelector('#photo-one'));
openModalEle.click();
expect(component.modalService.open).toHaveBeenCalled();
}));