Jest + Vue-SyntaxError:意外令牌< [英] Jest + Vue - SyntaxError: Unexpected token <

问题描述

我正尝试使用ts-Jest/Jest和Chai将测试添加到用TypeScript编写的Electron + Vue2应用程序中.但是，当我尝试运行为确保Jest正常工作而编写的简单测试时，我现在遇到了Jest的问题，似乎不喜欢我要导入要测试的组件模板的事实可以在错误中看到.当我尝试搜索与此相关的内容时，我的运气并不好，很多都指向意外的令牌导入"，这是我已经解决的问题.

I'm trying to add testing to my Electron + Vue2 application written in TypeScript using ts-Jest/ Jest and Chai. However when I try and run the simple test I wrote to try and make sure Jest is working correctly I'm now running into the issue of Jest seemingly not liking the fact that I'm importing the template of the component I'm testing as can be seen in the Error. When I try and search for things related to this I'm not having much luck and a lot of it points to "Unexpected token import" which is a problem I've already fixed.

如果有人对我如何获得测试有任何见识或知识，以免对导入HTML感到迷惑，那将是令人惊讶的，因为我很沮丧，而且文档也没有指出任何有用的东西.

If anyone has any insight or knowledge on how I can get the test to not freak out over importing HTML that would be amazing because I'm stumped and the documentation doesn't point to anything helpful it seems.

错误:

$ npm run test

> app@1.0.0 test C:\Users\daniel\Desktop\app\app
> jest --detectOpenHandles

FAIL src/app/features/app-window/app-window.component.spec.ts
  ● Test suite failed to run

    Jest encountered an unexpected token

    This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.

    By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".

    Here's what you can do:
     • 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/en/configuration.html

    Details:

    C:\Users\daniel\Desktop\app\app\src\app\features\app-application-content\app-application-content.component.html:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){<webview-component v-if="src"
                                                                                             ^

    SyntaxError: Unexpected token <

      2 | import Component from 'vue-class-component'
      3 | import { Prop, Watch } from 'vue-property-decorator'
    > 4 | import Template from './app-application-content.component.html'
        | ^
      5 |
      6 | import * as qs from 'qs'
      7 | import { INameValue } from '../../../contracts/Core'

      at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/script_transformer.js:403:17)
      at Object.<anonymous> (src/app/features/app-application-content/app-application-content.component.ts:4:1)
      at Object.<anonymous> (src/app/features/app-content/app-content.component.ts:9:1)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        12.924s
Ran all test suites.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! app@1.0.0 test: `jest --detectOpenHandles`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the app@1.0.0 test script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\daniel\AppData\Roaming\npm-cache\_logs\2018-11-21T14_25_23_427Z-debug.log

jest.config.js

module.exports = {
  preset: 'ts-jest/presets/js-with-ts',
  testEnvironment: 'node',
  verbose: true,
  moduleDirectories: ['node_modules', 'src'],
  modulePaths: ['<rootDir>/src', '<rootDir>/node_modules'],
  moduleFileExtensions: ['js', 'ts', 'json', 'node'],
  transformIgnorePatterns: ['node_modules/(?!(bootstrap-vue)/)'],
  testPathIgnorePatterns: [
    '/build/',
    '/config/',
    '/data/',
    '/dist/',
    '/node_modules/',
    '/test/',
    '/vendor/'
  ],
  globals: {
    'ts-jest': {
      tsConfig: './src/app/tsconfig.json'
    },
    NODE_ENV: 'test'
  }
}

tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "outDir": "./built/",
    "sourceMap": true,
    "strict": true,
    "moduleResolution": "node",
    "target": "ES2017",
    "experimentalDecorators": true,
    "noImplicitAny": false,
    "emitDecoratorMetadata": true,
    "allowSyntheticDefaultImports": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "esModuleInterop": true,
    "lib": ["es2017", "dom"],
    "include": [
      "**/*",
      "../types/**/*",
      "../../node_modules/bootstrap-vue/**/*",
      "../../node_modules/electron/**/*"
    ]
  }
}

app-window.component.spec.ts

import { expect } from 'chai'
import 'jest'
import { appWindowComponent } from './app-window.component'

const appWindowComponent = new appWindowComponent()

describe('Test: Set Title Function', () => {
  it('should set the variable title to the passed variable', () => {
    const title = 'this is a test'
    appWindowComponent.setTitle(title)
    expect(appWindowComponent.title).to.equal(title)
  })
})

推荐答案

在我潜心研究之后在这里找到了答案

新的jest.config.js

module.exports = {
  preset: 'ts-jest/presets/js-with-ts',
  testEnvironment: 'node',
  verbose: true,
  moduleDirectories: ['node_modules', 'src'],
  modulePaths: ['<rootDir>/src', '<rootDir>/node_modules'],
  moduleFileExtensions: ['js', 'ts', 'json', 'node', 'html'],
  transform: {
    '^.+\\.html$': '<rootDir>/config/htmlLoader.js'
  },
  transformIgnorePatterns: ['node_modules/(?!(bootstrap-vue)/)'],
  testPathIgnorePatterns: [
    '/build/',
    '/config/',
    '/data/',
    '/dist/',
    '/node_modules/',
    '/test/',
    '/vendor/'
  ],
  globals: {
    'ts-jest': {
      tsConfig: './src/app/tsconfig.json'
    },
    NODE_ENV: 'test'
  }
}

注意

transform: {
    '^.+\\.html$': '<rootDir>/config/htmlLoader.js'
  }, 

moduleFileExtensions: ['js', 'ts', 'json', 'node', 'html'],

HTML加载程序文件

const htmlLoader = require('html-loader')

module.exports = {
  process(src, filename, config, options) {
    return htmlLoader(src)
  }
}

这似乎已经起作用，因为我现在遇到了一个新的错误:)

This seemingly has worked as I'm now getting a new error :)

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