如何在角度上使用茉莉业力对MatSnackbar进行单元测试 [英] How to unit test MatSnackbar using Jasmine Karma in Angular
本文介绍了如何在角度上使用茉莉业力对MatSnackbar进行单元测试的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想对此onSubmit函数执行单元测试,其中肯定的深渊翻滚指向MatSnackbar,并显示消息&Submit Successful&Quot;。我刚接触Jasmine Karma,请指导我在这种情况下如何测试MatSnackbar。
Component.ts
import { MatSnackBar } from "@angular/material/snack-bar";
constructor(
private snackBar: MatSnackBar,
private auth: AuthenticateService,
) {}
...
...
onSubmit(e) {
const newYellow = {
G1: e.value.Yellow_G1,
G2: e.value.Yellow_G2,
G3: e.value.Yellow_G3,
G4: e.value.Yellow_G4,
B1: e.value.Yellow_B1,
B2: e.value.Yellow_B2,
B3: e.value.Yellow_B3,
B4: e.value.Yellow_B4,
};
console.log(newYellow);
this.auth.submitnominYellow(newYellow).subscribe(
(res) => {
console.log(res);
this.snackBar.open("Submitted Successfully", "", {
duration: 2000,
});
},
(error) => {
console.log(error);
}
);
}
这是submitnomin
函数的代码。
auth.service.ts
submitnominYellow(inpobj) {
console.log(inpobj);
return this.http.post(environment.apiUrl + '/api/customize/yellow', inpobj);
}
我的单元测试用例有点像这样。
component.spec.ts
const mockSnackbarMock = jasmine.createSpyObj(['open']);
mockSnackbarMock.open
const mockopblue =
{
success: true
}
const MockAuthService = {
submitnominYellow:(id) => (mockopblue),
getuser:() => (undefined)
};
...
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [ YellowCustomizeComponent ],
imports: [HttpClientTestingModule, MatSnackBarModule, FormsModule, RouterTestingModule],
providers:[{provide: MatSnackBar, useValue: mockSnackbarMock},
{provide: AuthenticateService, useValue: MockAuthService}
]
})
.compileComponents();
}));
...
fit('should open the snack bar with correct arguments when form submitted', () => {
const e = {
value:{
Yellow_G1: "YGirlName1",
Yellow_G2: "GirlName2",
Yellow_G3: "GirlName3",
Yellow_G4: "GirlName4",
Yellow_B1: "BoyName1",
Yellow_B2: "BoyName2",
Yellow_B3: "BoyName3",
Yellow_B4: "BoyName4",
}
};
component.onSubmit(e)
console.log('mockSnackbarMock',mockSnackbarMock)
// console.log('yellow onsubmit',component.onSubmit(e));
expect(mockSnackbarMock.open).toHaveBeenCalledWith("Submitted Successfully", "", );
})
推荐答案
在测试中,可以更改依赖项注入配置,以便提供模拟实例而不是SnackBar
实例。这就是怎么做的:
const mockSnackbarMock = jasmine.createSpyObj(['open']);
mockSnackbarMock.open
await TestBed.configureTestingModule({
declarations: [
...
],
providers: [
{provide: MatSnackBar, useValue: mockSnackbarMock},
],
imports: [
...
],
}).compileComponents();
稍后在测试中,在触发快餐栏的所有操作之后,您可以检查是否正确调用了open方法:
it('should open the snack bar with correct arguments when form submitted', () => {
//emulate submission
expect(mockSnackbarMock.open).toHaveBeenCalledWith("Submitted Successfully", "", {duration: 2000});
})
这篇关于如何在角度上使用茉莉业力对MatSnackbar进行单元测试的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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