我一直在苦苦挣扎，但是我无法弄清楚如何让这个工作起来。关于这个问题似乎有很多的问题，我尝试了所有的方法，但是我仍然似乎在运行jest时遇到了问题，import似乎根本不起作用。所以请问有人能协助我解决这个问题吗？
错误
运行这个程序会产生错误，但是如果我注释掉导入行，它就可以正常工作。
bablerc
我尝试添加了 "env": {"test": {"plugins": ["transform-es2015-modules-commonjs"]}} ，但它没有起作用，所以我暂时将其删除了。 package.json
错误
C:\Users\admin\Documents\my-app\_tests_\main.spec.js:1
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import React from 'react';
^^^^^^
SyntaxError: Unexpected token import
at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/ScriptTransformer.js:289:17)
at process._tickCallback (internal/process/next_tick.js:109:7)
main.spec.js
import React from 'react';
import { shallow, mount } from 'enzyme';
import renderer from 'react-test-renderer';
import { Home } from '../src/Home';
test('Basic Test', () => {
expect(2 + 2).toBe(4);
});
运行这个程序会产生错误，但是如果我注释掉导入行，它就可以正常工作。
bablerc
{
"plugins": [
"transform-async-functions",
"transform-object-rest-spread",
"transform-regenerator"
],
"presets": [
"es2015",
"react"
]
}
我尝试添加了 "env": {"test": {"plugins": ["transform-es2015-modules-commonjs"]}} ，但它没有起作用，所以我暂时将其删除了。 package.json
{
"name": "my-app",
"version": "0.0.1",
"description": "app",
"scripts": {
"start": "node server.js",
"postinstall": "webpack -p --define process.env.NODE_ENV=\"'production'\" --define process.env.SERVER_ROOT=\"'${SERVER_ROOT}'\"",
"start-dev": "webpack-dev-server",
"test": "jest"
},
"engines": {
"node": "6.11.1",
"npm": "3.10.8"
},
"jest": {
"transform": {
"^.+\\.jsx?$": "babel-jest"
},
"moduleNameMapper": { "\\.(s?css|less)$": "identity-obj-proxy" }
},
"dependencies": {
"babel-core": "^6.24.1",
"babel-loader": "^6.4.1",
"babel-plugin-transform-async-functions": "^6.22.0",
"babel-plugin-transform-object-rest-spread": "^6.23.0",
"babel-plugin-transform-regenerator": "^6.24.1",
"babel-polyfill": "^6.23.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"css-loader": "^0.28.0",
"express": "^4.15.4",
"file-loader": "^0.11.1",
"image-webpack-loader": "^3.3.0",
"moment": "^2.18.1",
"prop-types": "^15.5.8",
"react": "^15.5.4",
"react-bootstrap": "^0.31.0",
"react-bootstrap-table": "^3.3.3",
"react-datepicker": "^0.46.0",
"react-dom": "^15.5.4",
"react-dropzone": "^3.13.3",
"react-redux": "^5.0.4",
"react-router": "^4.1.1",
"react-router-dom": "^4.1.1",
"redux": "^3.6.0",
"redux-persist": "^4.6.0",
"redux-thunk": "^2.2.0",
"sails.io.js": "^1.1.10",
"socket.io-client": "1.6.0",
"style-loader": "^0.16.1",
"webpack": "^2.4.1"
},
"devDependencies": {
"babel-eslint": "^7.2.2",
"babel-jest": "^20.0.3",
"babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"enzyme": "^2.9.1",
"eslint": "^3.19.0",
"eslint-config-airbnb": "^14.1.0",
"eslint-plugin-babel": "^4.1.1",
"eslint-plugin-import": "^2.2.0",
"eslint-plugin-jsx-a11y": "^4.0.0",
"eslint-plugin-react": "^6.10.3",
"jest": "^20.0.4",
"react-test-renderer": "^15.6.1",
"webpack-dev-server": "^2.4.2",
"whatwg-fetch": "^2.0.3"
}
}
env、react、stage-0即可。如果在根级别上使用modules: false，则需要在测试环境中使用modules: true。意外的令牌导入通常意味着babel没有将其转换为commonJs模块以供jest/node消耗。 - Joel Quiles