.component.html 看起来像这样：
<div>Route Status: {{ routeStatus }}</div>
<div>{{ 'performsTrip' | transloco }}</div>
.component.ts 看起来像这样：
import { CommonModule } from '@angular/common';
import { Component, Input } from '@angular/core';
import { RouteStatus } from '../../../../shared/constants/route-status';
import { TranslocoRootModule } from '../../../../transloco-root.module';
@Component({
selector: 'sr-route-status',
templateUrl: './sr-route-status.component.html',
styleUrls: ['./sr-route-status.component.scss'],
standalone: true,
imports: [CommonModule, TranslocoRootModule],
})
export class SrRouteStatusComponent {
@Input() routeStatus = RouteStatus.PERFORMING_ROUTE;
}
.component.spec.ts 看起来像这样：
import { Component } from '@angular/core';
import { TestBed } from '@angular/core/testing';
import { SrRouteStatusComponent } from './sr-route-status.component';
function setup() {
@Component({
standalone: true,
imports: [SrRouteStatusComponent],
template: '<sr-route-status/>',
})
class SrRouteStatusTestHostComponent {}
const fixture = TestBed.createComponent(SrRouteStatusTestHostComponent);
const component = fixture.componentInstance;
fixture.detectChanges();
return { fixture, component };
}
describe('SrRouteStatusComponent', () => {
it('should create', () => {
const { component } = setup();
expect(component).toBeTruthy();
});
});
没有什么特别的，只需创建独立的组件测试即可。 但是，它显示错误。
错误：
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/a1234/Desktop/Work/shared-route-info/node_modules/flat/index.js:12
export function flatten (target, opts) {
^^^^^^
SyntaxError: Unexpected token 'export'
1 | import { isDevMode, NgModule } from '@angular/core';
> 2 | import {
| ^
3 | provideTransloco,
4 | TranslocoModule,
5 | } from '@ngneat/transloco';
at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1505:14)
at Object.<anonymous> (node_modules/@ngneat/transloco/fesm2022/ngneat-transloco.mjs:4:64)
at Object.<anonymous> (src/app/transloco-root.module.ts:2:1)
at Object.<anonymous> (src/app/main-layout/components/ui/sr-route-status/sr-route-status.component.spec.ts:4:1)
我认为这是由于 TranslocoRootModule 造成的。因为在 SrRouteStatusComponent .spec.ts 中我导入了 TranslocoRootModule。
standalone: true,
imports: [CommonModule, TranslocoRootModule],
那么，为了防止这个错误，我该如何导入TranslocoTestingModule？
我也用这种方式写了.spec.ts（它也不起作用）：
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { getTranslocoModule } from '../../../../shared/utils/transloco-helpers/transloco-module-testing-helper';
import { SrRouteStatusComponent } from './sr-route-status.component';
describe('SrRouteStatusComponent', () => {
let component: SrRouteStatusComponent;
let fixture: ComponentFixture<SrRouteStatusComponent>;
beforeEach(() => {
TestBed.configureTestingModule({
imports: [SrRouteStatusComponent, getTranslocoModule()],
});
fixture = TestBed.createComponent(SrRouteStatusComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
它显示此错误：
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/a1234/Desktop/Work/shared-route-info/node_modules/flat/index.js:12
export function flatten (target, opts) {
^^^^^^
SyntaxError: Unexpected token 'export'
> 1 | import { TranslocoTestingModule, TranslocoTestingOptions } from '@ngneat/transloco';
| ^
2 |
3 | import en from '../../../../assets/i18n/en.json';
4 | import ru from '../../../../assets/i18n/ru.json';
at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1505:14)
at Object.<anonymous> (node_modules/@ngneat/transloco/fesm2022/ngneat-transloco.mjs:4:64)
at Object.<anonymous> (src/app/shared/utils/transloco-helpers/transloco-module-testing-helper.ts:1:1)
at Object.<anonymous> (src/app/main-layout/components/ui/sr-route-status/sr-route-status.component.spec.ts:3:1)
我只是降级了 Transloco 版本，然后就可以了