问如何在角形Nx回购中用Jest测试Swiper库？

EN

  ● 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:

    C:\Users\Philippe\Documents\Projects\temp\swiper-angular-nx-jest\node_modules\ssr-window\ssr-window.esm.js:148
    export { extend, getDocument, getWindow, ssrDocument, ssrWindow };
    ^^^^^^


      at Runtime.createScriptFromCode (../../node_modules/jest-runtime/build/index.js:1728:14)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        4.775 s
Ran all test suites.

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 >  NX   Ran target test for project client (9s)

    ×    1/1 failed
    √    0/1 succeeded [0 read from cache]

PS C:\Users\Philippe\Documents\Projects\temp\swiper-angular-nx-jest> nx test

> nx run client:test

 FAIL   client  apps/client/src/app/carousel/carousel.component.spec.ts
  ● Test suite failed to run

    Cannot find module 'swiper_angular' from 'src/app/carousel/carousel.component.ts'

    Require stack:
      src/app/carousel/carousel.component.ts
      src/app/carousel/carousel.component.spec.ts

       5 | } from '@angular/core';
       6 | import SwiperCore, { Virtual } from 'swiper';
    >  7 | import { SwiperComponent, SwiperModule } from 'swiper/angular';
         | ^
       8 |
       9 | // install Swiper modules
      10 | SwiperCore.use([Virtual]);
      at Resolver.resolveModule (../../node_modules/jest-resolve/build/resolver.js:324:11)
      at Object.<anonymous> (src/app/carousel/carousel.component.ts:7:1)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        22.235 s
Ran all test suites.

 —————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————— 

 >  NX   Ran target test for project client (26s)

    ×    1/1 failed
    √    0/1 succeeded [0 read from cache]

PS C:\Users\Philippe\Documents\Projects\temp\swiper-angular-nx-jest> nx test

> nx run client:test

 FAIL   client  apps/client/src/app/carousel/carousel.component.spec.ts
  ● Test suite failed to run

    Cannot find module 'swiper_angular' from 'src/app/carousel/carousel.component.ts'

    Require stack:
      src/app/carousel/carousel.component.ts
      src/app/carousel/carousel.component.spec.ts

       5 | } from '@angular/core';
       6 | import SwiperCore, { Virtual } from 'swiper';
    >  7 | import { SwiperComponent, SwiperModule } from 'swiper/angular';
         | ^
       8 |
       9 | // install Swiper modules
      10 | SwiperCore.use([Virtual]);

      at Resolver.resolveModule (../../node_modules/jest-resolve/build/resolver.js:324:11)
      at Object.<anonymous> (src/app/carousel/carousel.component.ts:7:1)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        4.117 s
Ran all test suites.

 ——————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————

 >  NX   Ran target test for project client (8s)

    ×    1/1 failed
    √    0/1 succeeded [0 read from cache]

module.exports = {
  displayName: 'client',
  preset: '../../jest.preset.ts',
  setupFilesAfterEnv: ['<rootDir>/src/test-setup.ts'],
  globals: {
    'ts-jest': {
      tsconfig: '<rootDir>/tsconfig.spec.json',
      stringifyContentPathRegex: '\\.(html|svg)$',
    },
  },
  coverageDirectory: '../../coverage/apps/client',
  transform: {
    '^.+\\.(ts|mjs|js|html)$': 'jest-preset-angular',
  },
  transformIgnorePatterns: [`<rootDir>/node_modules/(?!.*\\.mjs$|swiper)`],
  snapshotSerializers: [
    'jest-preset-angular/build/serializers/no-ng-attributes',
    'jest-preset-angular/build/serializers/ng-snapshot',
    'jest-preset-angular/build/serializers/html-comment',
  ],
};

import { CommonModule } from '@angular/common';
import {
  ChangeDetectionStrategy, Component, NgModule,
  ViewChild
} from '@angular/core';
import SwiperCore, { Virtual } from 'swiper';
import { SwiperComponent, SwiperModule } from 'swiper/angular';

// install Swiper modules
SwiperCore.use([Virtual]);

@Component({
  selector: 'swiper-angular-nx-jest-carousel',
  template: `
    <swiper #swiper [virtual]="true">
      <ng-template swiperSlide>Slide 1</ng-template>
      <ng-template swiperSlide>Slide 2</ng-template>
      <ng-template swiperSlide>Slide 3</ng-template>
      <ng-template swiperSlide>Slide 4</ng-template>
      <ng-template swiperSlide>Slide 5</ng-template>
      <ng-template swiperSlide>Slide 6</ng-template>
      <ng-template swiperSlide>Slide 7</ng-template>
    </swiper>
    <button (click)="slidePrev()">Prev slide</button>
    <button (click)="slideNext()">Next slide</button>
  `,
  styleUrls: ['./carousel.component.css'],
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class CarouselComponent {
   @ViewChild('swiper', { static: false }) swiper!: SwiperComponent;
  slideNext(){
    this.swiper.swiperRef.slideNext(100);
  }
  slidePrev(){
    this.swiper.swiperRef.slidePrev(100);
  }
}

@NgModule({
  imports: [CommonModule, SwiperModule],
  declarations: [CarouselComponent],
  exports: [CarouselComponent],
})
export class CarouselComponentModule {}

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { CarouselComponent, CarouselComponentModule } from './carousel.component';


describe('CarouselComponent', () => {
  let component: CarouselComponent;
  let fixture: ComponentFixture<CarouselComponent>;

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      imports: [CarouselComponentModule],
    }).compileComponents();
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(CarouselComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });
});