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在 Angular 14 + Ionic 6 项目中设置 Jest

angulartypescriptunit-testingionic-frameworkts-jest
5
我正在尝试将Jest测试框架集成到我的项目中，该项目使用Angular 14和Ionic 6，还使用其他可能会引起冲突的插件，例如firebase和ngrx。
我主要遵循了Tim Deschryver教程和其他一些教程，甚至从stackoverflow上复制并粘贴了一些代码来解决我的Jest测试错误，但是没有任何效果。我甚至尝试了删除所有软件包和修改并重新开始，但是仍然没有成功。
这里是我更新的repo https://github.com/neil89/igloo（它非常易于管理）。但总的来说，我的主要修改如下：

package.json

{
  "name": "igloo",
  "version": "0.0.1",
  "author": "Ionic Framework",
  "homepage": "https://ionicframework.com/",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "jest",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/common": "^14.0.0",
    "@angular/core": "^14.0.0",
    "@angular/fire": "^7.4.1",
    "@angular/forms": "^14.0.0",
    "@angular/platform-browser": "^14.0.0",
    "@angular/platform-browser-dynamic": "^14.0.0",
    "@angular/router": "^14.0.0",
    "@briebug/jest": "^1.3.1",
    "@ionic/angular": "^6.2.6",
    "@ngrx/effects": "^14.3.1",
    "@ngrx/store": "^14.3.1",
    "firebase": "^9.9.4",
    "rxjs": "~6.6.0",
    "tslib": "^2.2.0",
    "zone.js": "~0.11.4"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "^14.0.0",
    "@angular-eslint/builder": "~13.0.1",
    "@angular-eslint/eslint-plugin": "~13.0.1",
    "@angular-eslint/eslint-plugin-template": "~13.0.1",
    "@angular-eslint/template-parser": "~13.0.1",
    "@angular/cli": "^14.0.0",
    "@angular/compiler": "^14.0.0",
    "@angular/compiler-cli": "^14.0.0",
    "@angular/language-service": "^14.0.0",
    "@types/jest": "^29.0.1",
    "@types/node": "^12.11.1",
    "@typescript-eslint/eslint-plugin": "5.3.0",
    "@typescript-eslint/parser": "5.3.0",
    "eslint": "^7.6.0",
    "eslint-plugin-import": "2.22.1",
    "eslint-plugin-jsdoc": "30.7.6",
    "eslint-plugin-prefer-arrow": "1.2.2",
    "jest": "^28.1.3",
    "jest-preset-angular": "^12.2.2",
    "protractor": "~7.0.0",
    "ts-node": "~8.3.0",
    "typescript": "~4.7.3"
  },
  "jest": {
    "preset": "jest-preset-angular",
    "setupFilesAfterEnv": [
      "<rootDir>/src/setupJest.ts"
    ],
    "globalSetup": "jest-preset-angular/global-setup"
  },
  "description": "An Ionic project"
}

jest.config.js

/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
module.exports = {
  globals: {
    'ts-jest': {
      tsconfig: 'tsconfig.spec.json',
      isolatedModules: true,
    },
  },
  moduleNameMapper: {
    '@angular/compiler-cli/ngcc': '<rootDir>/node_modules/@angular/compiler-cli/bundles/ngcc/main-ngcc.js',
  },
  testEnvironment: 'jsdom',
  modulePathIgnorePatterns: ['examples/.*', 'website/.*'],
  snapshotSerializers: [require.resolve('jest-snapshot-serializer-raw')],
  testPathIgnorePatterns: ['/node_modules/', '/examples/', '/e2e/.*/__tests__', '\\.snap$'],
  transform: {
    '^.+\\.(ts|js|mjs|html)$': '<rootDir>/build/index.js',
  },
  transformIgnorePatterns: ['node_modules/(?!(jest-test|@ngrx))'],
};

setupJest.ts

import 'jest-preset-angular';

以下是我比较简单的失败测试之一： app.component.spec.ts

import { TestBed } from '@angular/core/testing';
import { RouterTestingModule } from '@angular/router/testing';
import { AppComponent } from './app.component';

describe('AppComponent', () => {

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      declarations: [
        AppComponent
      ],
      imports: [
        RouterTestingModule.withRoutes([])
      ],
    }).compileComponents();
  });

  it('should create the app', (() => {
    const fixture = TestBed.createComponent(AppComponent);
    const app = fixture.debugElement.componentInstance;
    expect(app).toBeTruthy();
  }));

  it('should have menu labels', (() => {
    const fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    const app = fixture.nativeElement;
    const menuItems = app.querySelectorAll('ion-label');
    expect(menuItems.length).toEqual(7);
    expect(menuItems[0].textContent).toContain('Inbox');
    expect(menuItems[1].textContent).toContain('Outbox');
  }));

  it('should have urls', () => {
    const fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    const app = fixture.nativeElement;
    const menuItems = app.querySelectorAll('ion-item');
    expect(menuItems.length).toEqual(7);
    expect(menuItems[0].getAttribute('ng-reflect-router-link')).toEqual('/folder/Inbox');
    expect(menuItems[1].getAttribute('ng-reflect-router-link')).toEqual('/folder/Outbox');
  });

});

现在，当我运行npm test时，我的输出如下：

> igloo@0.0.1 test
> jest

Determining test suites to run...
ngcc-jest-processor: running ngcc
 FAIL  src/app/fridge/fridge.service.spec.ts
  ● Test suite failed to run

    Jest encountered an unexpected token

    Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.

    Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.

    By default "node_modules" folder is ignored by transformers.

    Here's what you can do:
     • If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it.
     • If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript
     • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
     • If you need a custom transformation specify a "transform" option in your config.
     • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.

    You'll find more details and examples of these config options in the docs:
    https://jestjs.io/docs/configuration
    For information about custom transformations, see:
    https://jestjs.io/docs/code-transformation

    Details:

    /Users/daniel.rodriguez/Documents/Personal/iGloo/igloo/node_modules/firebase/app/dist/index.esm.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import { registerVersion } from '@firebase/app';
                                                                                      ^^^^^^

    SyntaxError: Cannot use import statement outside a module

      at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1796:14)
      at node_modules/@angular/fire/bundles/angular-fire.umd.js:2:111
      at Object.<anonymous> (node_modules/@angular/fire/bundles/angular-fire.umd.js:5:2)

 FAIL  src/app/fridge/fridge.component.spec.ts
  ● Test suite failed to run

    Jest encountered an unexpected token

    Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.

    Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.

    By default "node_modules" folder is ignored by transformers.

    Here's what you can do:
     • If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it.
     • If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript
     • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
     • If you need a custom transformation specify a "transform" option in your config.
     • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.

    You'll find more details and examples of these config options in the docs:
    https://jestjs.io/docs/configuration
    For information about custom transformations, see:
    https://jestjs.io/docs/code-transformation

    Details:

    /Users/daniel.rodriguez/Documents/Personal/iGloo/igloo/node_modules/firebase/app/dist/index.esm.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import { registerVersion } from '@firebase/app';
                                                                                      ^^^^^^

    SyntaxError: Cannot use import statement outside a module

      at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1796:14)
      at node_modules/@angular/fire/bundles/angular-fire.umd.js:2:111
      at Object.<anonymous> (node_modules/@angular/fire/bundles/angular-fire.umd.js:5:2)

 FAIL  src/app/folder/folder.page.spec.ts
  ● FolderPage › should create

    Need to call TestBed.initTestEnvironment() first

       9 |
      10 |   beforeEach(async () => {
    > 11 |     await TestBed.configureTestingModule({
         |                   ^
      12 |       declarations: [ FolderPage ],
      13 |       imports: [IonicModule.forRoot(), RouterModule.forRoot([])]
      14 |     }).compileComponents();

      at TestBedRender3.get compiler [as compiler] (node_modules/@angular/core/fesm2020/testing.mjs:26367:19)
      at TestBedRender3.configureTestingModule (node_modules/@angular/core/fesm2020/testing.mjs:26290:14)
      at Function.configureTestingModule (node_modules/@angular/core/fesm2020/testing.mjs:26126:30)
      at src/app/folder/folder.page.spec.ts:11:19
      at node_modules/tslib/tslib.js:118:75
      at Object.__awaiter (node_modules/tslib/tslib.js:114:16)
      at Object.<anonymous> (src/app/folder/folder.page.spec.ts:10:25)

  ● FolderPage › should create

    zone-testing.js is needed for the fakeAsync() test helper but could not be found.
            Please make sure that your environment includes zone.js/testing

      at resetFakeAsyncZone (node_modules/@angular/core/fesm2020/testing.mjs:273:11)
      at Object.<anonymous> (node_modules/@angular/core/fesm2020/testing.mjs:26603:13)

 FAIL  src/app/app.component.spec.ts
  ● AppComponent › should create the app

    Need to call TestBed.initTestEnvironment() first

       7 |
       8 |   beforeEach(async () => {
    >  9 |     await TestBed.configureTestingModule({
         |                   ^
      10 |       declarations: [
      11 |         AppComponent
      12 |       ],

      at TestBedRender3.get compiler [as compiler] (node_modules/@angular/core/fesm2020/testing.mjs:26367:19)
      at TestBedRender3.configureTestingModule (node_modules/@angular/core/fesm2020/testing.mjs:26290:14)
      at Function.configureTestingModule (node_modules/@angular/core/fesm2020/testing.mjs:26126:30)
      at src/app/app.component.spec.ts:9:19
      at node_modules/tslib/tslib.js:118:75
      at Object.__awaiter (node_modules/tslib/tslib.js:114:16)
      at Object.<anonymous> (src/app/app.component.spec.ts:8:25)

  ● AppComponent › should create the app

    zone-testing.js is needed for the fakeAsync() test helper but could not be found.
            Please make sure that your environment includes zone.js/testing

      at resetFakeAsyncZone (node_modules/@angular/core/fesm2020/testing.mjs:273:11)
      at Object.<anonymous> (node_modules/@angular/core/fesm2020/testing.mjs:26603:13)

  ● AppComponent › should have menu labels

    NG0908: In this configuration Angular requires Zone.js

      25 |
      26 |   it('should have menu labels', (() => {
    > 27 |     const fixture = TestBed.createComponent(AppComponent);
         |                             ^
      28 |     fixture.detectChanges();
      29 |     const app = fixture.nativeElement;
      30 |     const menuItems = app.querySelectorAll('ion-label');

      at new NgZone (node_modules/@angular/core/fesm2020/core.mjs:26180:19)
      at R3TestBedCompiler.compileTestModule (node_modules/@angular/core/fesm2020/testing.mjs:25851:24)
      at R3TestBedCompiler.finalize (node_modules/@angular/core/fesm2020/testing.mjs:25419:14)
      at TestBedRender3.get testModuleRef [as testModuleRef] (node_modules/@angular/core/fesm2020/testing.mjs:26377:49)
      at TestBedRender3.inject (node_modules/@angular/core/fesm2020/testing.mjs:26300:29)
      at TestBedRender3.createComponent (node_modules/@angular/core/fesm2020/testing.mjs:26340:44)
      at Function.createComponent (node_modules/@angular/core/fesm2020/testing.mjs:26179:37)
      at Object.<anonymous> (src/app/app.component.spec.ts:27:29)

  ● AppComponent › should have menu labels

    zone-testing.js is needed for the fakeAsync() test helper but could not be found.
            Please make sure that your environment includes zone.js/testing

      at resetFakeAsyncZone (node_modules/@angular/core/fesm2020/testing.mjs:273:11)
      at Object.<anonymous> (node_modules/@angular/core/fesm2020/testing.mjs:26603:13)

  ● AppComponent › should have urls

    NG0908: In this configuration Angular requires Zone.js

      35 |
      36 |   it('should have urls', () => {
    > 37 |     const fixture = TestBed.createComponent(AppComponent);
         |                             ^
      38 |     fixture.detectChanges();
      39 |     const app = fixture.nativeElement;
      40 |     const menuItems = app.querySelectorAll('ion-item');

      at new NgZone (node_modules/@angular/core/fesm2020/core.mjs:26180:19)
      at R3TestBedCompiler.compileTestModule (node_modules/@angular/core/fesm2020/testing.mjs:25851:24)
      at R3TestBedCompiler.finalize (node_modules/@angular/core/fesm2020/testing.mjs:25419:14)
      at TestBedRender3.get testModuleRef [as testModuleRef] (node_modules/@angular/core/fesm2020/testing.mjs:26377:49)
      at TestBedRender3.inject (node_modules/@angular/core/fesm2020/testing.mjs:26300:29)
      at TestBedRender3.createComponent (node_modules/@angular/core/fesm2020/testing.mjs:26340:44)
      at Function.createComponent (node_modules/@angular/core/fesm2020/testing.mjs:26179:37)
      at Object.<anonymous> (src/app/app.component.spec.ts:37:29)

  ● AppComponent › should have urls

    zone-testing.js is needed for the fakeAsync() test helper but could not be found.
            Please make sure that your environment includes zone.js/testing

      at resetFakeAsyncZone (node_modules/@angular/core/fesm2020/testing.mjs:273:11)
      at Object.<anonymous> (node_modules/@angular/core/fesm2020/testing.mjs:26603:13)

Test Suites: 4 failed, 4 total
Tests:       4 failed, 4 total
Snapshots:   0 total
Time:        1.861 s, estimated 2 s
Ran all test suites.

我很感激你的帮助，肯定有一些未配置或未初始化的东西。谢谢！

1个回答
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