Angular 8-加载垫模块的单元测试问题

分类：编程问答

如何解决Angular 8-加载垫模块的单元测试问题

我正在尝试为登录组件编写Angular的单元测试。 在组件中，我使用 mat-form-field ， mat-label ， mat-icon 和 mat-error 。 他们工作正常。但是当我运行ng test --code-coverage

所有模块都导入/导出到名为material-module的模块。然后将模块导入到登录模块中。
这是我的 login.component.html 

<div class="text-center">
  <h1>S'identifier</h1>
</div>
<form class="" [formGroup]="userForm" (ngSubmit)="submit(userForm)">
  <div class="card-body p-6 mb-3">
    <div class="form-group">
      <mat-form-field appearance="outline" class="login-id-form-field">
        <mat-label>Identifiant</mat-label>
        <input
          matInput
          id="email"
          type="email"
          class="login-id"
          [formControl]="userForm.controls['email']"
          [errorStateMatcher]="matcher"
        />
        <mat-icon
          matSuffix
          class="red-icon error-icon"
          *ngIf="
            matcher.isErrorState(userForm.controls['email']) &&
            userForm.controls['email'].errors
          "
          >error</mat-icon
        >
        <mat-icon
          matSuffix
          class="green-icon error-icon"
          *ngIf="!userForm.controls['email'].errors"
        >
          check_circle
        </mat-icon>
        <mat-error *ngIf="userForm.controls['email'].errors">
          Identifiant invalide
        </mat-error>
      </mat-form-field>
    </div>
    <div class="form-group">
      <mat-form-field
        appearance="outline"
        class="login-id-form-field password-form-field"
      >
        <mat-label>Mot de passe</mat-label>
        <input
          matInput
          id="password"
          type="password"
          class="login-id"
          [formControl]="userForm.controls['password']"
          [errorStateMatcher]="matcher"
        />
        <mat-icon
          matSuffix
          class="red-icon error-icon"
          *ngIf="
            matcher.isErrorState(userForm.controls['password']) &&
            userForm.controls['password'].errors
          "
        >
          error
        </mat-icon>
        <mat-icon
          matSuffix
          class="green-icon error-icon"
          *ngIf="!userForm.controls['password'].errors"
        >
          check_circle
        </mat-icon>

        <mat-error *ngIf="userForm.controls['password'].errors">
          Mot de passe invalide ( {{ passwordStrength.label }} )
        </mat-error>
      </mat-form-field>
      <div class="d-flex mt-2" style="height: 24px">
        <mat-error *ngIf="auth.loginError.length && userForm.valid">
          E-mail ou mot de passe incorrect
        </mat-error>
        <div class="ml-auto text-right">
          <a [routerLink]="'reset-password'">Mot de passe oublié ?</a>
        </div>
      </div>
    </div>
    <div class="form-footer mt-5">
      <button
        type="submit"
        class="btn d-block mx-auto primary-strada-btn strada-btn-large"
        [disabled]="!userForm.valid || auth.loggingIn"
      >
        Connexion
      </button>
    </div>
  </div>
</form>

这是我的 login.component.spec.ts 

import { TestBed,ComponentFixture } from "@angular/core/testing";
import { ReactiveFormsModule,FormsModule } from "@angular/forms";
import { LoginPageComponent } from "./login-page.component";
// import { LoginPageComponent,User } from "./login-page.component";

describe("Component: Login",() => {
  let component: LoginPageComponent;
  let fixture: ComponentFixture<LoginPageComponent>;

  beforeEach(() => {
    // refine the test module by declaring the test component
    TestBed.configureTestingModule({
      imports: [ReactiveFormsModule,FormsModule],declarations: [LoginPageComponent],});

    // create component and test fixture
    fixture = TestBed.createComponent(LoginPageComponent);

    // get test component from the fixture
    component = fixture.componentInstance;
    component.ngOnInit();
  });

  it("form invalid when empty",() => {
    expect(component.userForm.valid).toBeFalsy();
  });
});

我得到这些错误。

enter image description here

Your global Angular CLI version (10.0.5) is greater than your local
version (8.0.6). The local Angular CLI version is used.

To disable this warning use "ng config -g cli.warnings.versionMismatch false".
14 09 2020 15:01:47.510:INFO [framework:karma-parallel]: sharding specs across 4 browsers
 10% building 2/2 modules 0 active14 09 2020 15:01:53.934:INFO [karma-server]: Karma v4.1.0 server started at http://0.0.0.0:9876/
14 09 2020 15:01:53.936:INFO [launcher]: Launching browsers ChromeHeadless,ChromeHeadless,ChromeHeadless with concurrency unlimited
14 09 2020 15:01:53.943:INFO [launcher]: Starting browser ChromeHeadless
14 09 2020 15:01:53.950:INFO [launcher]: Starting browser ChromeHeadless
14 09 2020 15:01:53.954:INFO [launcher]: Starting browser ChromeHeadless
14 09 2020 15:01:53.964:INFO [launcher]: Starting browser ChromeHeadless
14 09 2020 15:02:10.647:INFO [HeadlessChrome 85.0.4183 (Windows 10.0.0)]: Connected on socket ASC5nD0AuFD0GspSAAAA with id 52943636
14 09 2020 15:02:10.652:INFO [HeadlessChrome 85.0.4183 (Windows 10.0.0)]: Connected on socket QA4STEUC5v4EV55_AAAB with id 27694527
14 09 2020 15:02:10.655:INFO [HeadlessChrome 85.0.4183 (Windows 10.0.0)]: Connected on socket 060bO_di1o_9LmmsAAAC with id 63183944
14 09 2020 15:02:10.658:INFO [HeadlessChrome 85.0.4183 (Windows 10.0.0)]: Connected on socket iAPjmFOsygupfAcZAAAD with id 2553141
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 0 of 1 SUCCESS (0 secs / 0 secs)
WARN: 'Spec '[karma-parallel] Add single test to prevent failure should prevent on this shard failing by having successful tests' has no expectations.'
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 0 of 1 SUCCESS (0 secs / 0 secs)
WARN: 'Spec '[karma-parallel] Add single test to prevent failure should prevent on this shard failing by having successfHeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 SUCCESS (0.032 secs / 0.004 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 SUCCESS (0.032 secs / 0.004 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 SUCCESS (0.032 secs / 0.004 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0) WARN: 'Spec '[karma-parallel] Add single test to prevent failure should prevent on this shard failing by having successful tests' has no expectations.'
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 SUCCESS (0.032 secs / 0.004 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 0 of 1 SUCCESS (0 secs / 0 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0) Component: Login form invalid when empty FAILED
        1. If 'mat-label' is an Angular component,then verify that it is part of this module.
        2. If 'mat-label' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("class="form-group">
              <mat-form-field appearance="outline" class="login-id-form-field">
                [ERROR ->]<mat-label>Identifiant</mat-label>
                <input
                  matInput
                  class="login-id"
                  [formControl]="userForm.controls['email']"
                  [ERROR ->][errorStateMatcher]="matcher"
                />
                <mat-icon
        1. If 'mat-icon' is an Angular component,then verify that it is part of this module.
        error properties: Object({ ngSyntaxError: true,ngParseErrors: [ 'mat-label' is not a known element:
        "): ng:///DynamicTestModule/LoginPageComponent.html@7:8,Can't bind to 'errorStateMatcher' since it isn't a known property of 'input'. ("
        "): ng:///DynamicTestModule/LoginPageComponent.html@14:10,'mat-icon' is not a known element:
        2. If 'mat-icon' is a Web  ...
            at <Jasmine>
            at syntaxError (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:2175:1)
            at TemplateParser.parse (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:11169:1)
            at JitCompiler._parseTemplate (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25541:1)
            at JitCompiler._compileTemplate (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25529:61)
            at http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25473:1
            at <Jasmine>
            at JitCompiler._compileComponents (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25473:1)
            at http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25393:1
            at Object.then (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:2166:27)
            at JitCompiler._compileModuleAndAllComponents (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25391:1)
        TypeError: Cannot read property 'userForm' of undefined
            at <Jasmine>
            at UserContext.<anonymous> (http://localhost:9876/_karma_webpack_/webpack:/src/app/login/login-page/login-page.component.spec.ts:26:22)
            at ZoneDelegate.invoke (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-evergreen.js:359:1)
            at ProxyZoneSpec.push../node_modules/zone.js/dist/zone-testing.js.ProxyZoneSpec.onInvoke (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-testing.js:308:1)
            at ZoneDelegate.invoke (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-evergreen.js:358:1)
            at Zone.run (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-evergreen.js:124:1)
            at runInTestZone (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-testing.js:561:1)
            at UserContext.<anonymous> (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-testing.js:576:1)
            at <Jasmine>
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 SUCCESS (0.032 secs / 0.004 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 (1 FAILED) (0 secs / 0.255 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 2 of 5 SUCCESS (0 secs / 0.159 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 SUCCESS (0.026 secs / 0.004 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0) Component: Login form invalid when empty FAILED
        1. If 'mat-label' is an Angular component,'mat-icon' is not a known element:
        2. If 'mat-icon' is a Web  ...
            at <Jasmine>
            at syntaxError (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:2175:1)
            at TemplateParser.parse (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:11169:1)
            at JitCompiler._parseTemplate (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25541:1)
            at JitCompiler._compileTemplate (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25529:61)
            at http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25473:1
            at <Jasmine>
            at JitCompiler._compileComponents (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25473:1)
            at http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25393:1
            at Object.then (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:2166:27)
            at JitCompiler._compileModuleAndAllComponents (http://localhost:9876/_karma_webpack_/webpack:/node_modules/@angular/compiler/fesm2015/compiler.js:25391:1)
        TypeError: Cannot read property 'userForm' of undefined
            at <Jasmine>
            at UserContext.<anonymous> (http://localhost:9876/_karma_webpack_/webpack:/src/app/login/login-page/login-page.component.spec.ts:26:22)
            at ZoneDelegate.invoke (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-evergreen.js:359:1)
            at ProxyZoneSpec.push../node_modules/zone.js/dist/zone-testing.js.ProxyZoneSpec.onInvoke (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-testing.js:308:1)
            at ZoneDelegate.invoke (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-evergreen.js:358:1)
            at Zone.run (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-evergreen.js:124:1)
            at runInTestZone (http://localhost:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-testing.js:5HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 SUCCESS (0.032 secs / 0.004 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 (1 FAILED) ERROR (0.307 secs / 0.255 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 5 of 5 SUCCESS (0.3 secs / 0.248 secs)
HeadlessChrome 85.0.4183 (Windows 10.0.0): Executed 1 of 1 SUCCESS (0.026 secs / 0.004 secs)

=============================== Coverage summary ===============================
Statements   : 23.48% ( 31/132 )
Branches     : 2.44% ( 1/41 )
Functions    : 10.42% ( 5/48 )
Lines        : 21.14% ( 26/123 )
================================================================================

解决方法

我所需要做的就是在其中导入AngularMaterialModule 

    // refine the test module by declaring the test component
    TestBed.configureTestingModule({
      imports: [
        ReactiveFormsModule,FormsModule,AngularMaterialModule],<-------------------------------------------
      declarations: [LoginPageComponent],});```

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