为Typescript,es6和Webpack 2配置Jest [英] Configuring Jest for Typescript, es6 and Webpack 2
问题描述
在我的tsconfig中,我当前将模块的compileerOption属性设置为"es6",但是,当我运行Jest时,会收到以下错误:
In my tsconfig I currently have the module compilerOption property set to "es6" however, when I run Jest I receive the following error:
Test suite failed to run
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){require('ts-jest').install();import { User } from './models/user;
^^^^^^
SyntaxError: Unexpected token import
at transformAndBuildScript (node_modules\jest-runtime\build\transform.js:320:12)
at process._tickCallback (internal\process\next_tick.js:103:7)
如果我将模块切换为"commonJS",则测试运行正常.但是,我不需要这样做,因为babel插件"transform-es2015-modules-commonjs"应该为我将ES模块转换为commonJS(或者我的理解不正确吗?).
If I switch the module to "commonJS" then the tests run fine. However, I shouldn't need to do this as the babel plugin "transform-es2015-modules-commonjs" should transpile ES modules to commonJS for me (or is my understanding incorrect?).
我怀疑我配置了一些小但重要的东西.谁能指出我遇到麻烦的地方了?
I suspect I've misconfigured something small but important. Can anyone point out where I'm running into trouble?
谢谢.
.tsconfig
{
"compilerOptions": {
"module": "es6", // Changing this to "commonJS" resolves the error.
"target": "es6",
"moduleResolution": "node",
"baseUrl": "src",
"allowSyntheticDefaultImports": true,
"noImplicitAny": false,
"sourceMap": true,
"outDir": "ts-build",
"jsx": "preserve",
"experimentalDecorators": true,
"noUnusedLocals": true,
"noUnusedParameters": true
},
"filesGlob": [
"**/*.ts",
"**/*.tsx"
],
"exclude": [
"node_modules",
"dist"
]
}
.babelrc
{
"presets": [
"es2015",
"react",
"stage-0",
{"modules": false}
],
"env": {
"test": {
"plugins": [
"transform-es2015-modules-commonjs"
]
}
}
}
package.json的笑话部分
"jest": {
"transform": {
"\\.(ts|tsx)$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
},
"moduleFileExtensions": [
"ts",
"tsx",
"js"
],
"testRegex": "(/__tests__/.*|\\.(test|spec))\\.(ts|tsx|js)$",
"moduleNameMapper": {
"\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__mocks__/fileMock.js",
"\\.(css|less)$": "<rootDir>/__mocks__/styleMock.js"
},
"testPathDirs": [
"./src"
],
"collectCoverage": true,
"testResultsProcessor": "<rootDir>/node_modules/ts-jest/coverageprocessor.js"
}
注意:我还遵循了官方有关使用Webpack 2进行设置的建议.
推荐答案
这似乎是此处.
This appears to be a known issue, further reference here.
我可以通过为玩笑添加单独的替代tsconfig设置来解决此问题.
I was able to workaround the issue by adding separate override tsconfig settings for jest.
"globals": {
"__TS_CONFIG__": {
"module": "commonjs",
jsx": "react"
}
因此,我的项目可以继续以es6模块为目标.
Thus my project can continue to target es6 modules.
这给了我部分解决方案.最终的解决方案看起来像这样
package.json
package.json
{
"private": true,
"version": "0.0.0",
"name": "example-typescript",
"dependencies": {
"react": "16.4.1",
"react-dom": "16.4.1",
"lodash-es": "^4.17.11"
},
"devDependencies": {
"babel-cli": "^6",
"babel-core": "^6",
"babel-plugin-source-map-support": "^2.0.1",
"babel-plugin-transform-es2015-classes": "^6.24.1",
"babel-plugin-transform-es2015-modules-commonjs": "^6.26.2",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-polyfill": "^6",
"babel-preset-env": "^1.6",
"babel-preset-stage-0": "^6",
"babel-runtime": "^6",
"babel-jest": "^22.0.3",
"babel-plugin-transform-imports": "^1.5.1",
"babel-preset-es2015": "^6.24.1",
"@types/jest": "^23.1.1",
"@types/node": "^10.12.3",
"jest": "*",
"typescript": "*",
"ts-jest": "*"
},
"scripts": {
"test": "jest"
},
"jest": {
"moduleFileExtensions": [
"ts",
"tsx",
"js"
],
"transform": {
"^.+\\.(|ts|tsx)$": "ts-jest",
"^.+\\.(js|jsx)$": "babel-jest"
},
"transformIgnorePatterns": [],
"globals": {
"__TS_CONFIG__": {
"target": "es2015",
"module": "commonjs",
"jsx": "react"
}
},
"testMatch": [
"**/__tests__/*.+(ts|tsx|js)"
]
}
}
与.babelrc
{
"env": {
"test":{
"passPerPreset": true,
"presets": [
"babel-preset-env"
],
"plugins": [
"transform-es2015-modules-commonjs",
"transform-es2015-classes"
]
}
}
}
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