jest webpack babel

jest_webpack_babel

// https://redux.js.org/recipes/writing-tests
// https://facebook.github.io/jest/docs/en/webpack.html

npm i -D jest babel-jest transform-es2015-modules-commonjs


// package.json
{
    ...
    "jest": {
        "verbose": true,
        "transform": {
            "^.+\\.jsx?$": "babel-jest"
        },
        "modulePaths": ["<rootDir>/src/"]
    },
    "scripts": {
        ...
        "test": "jest",
        "test:watch": "npm test -- --watch"
    },
}


// .babelrc
{
    ...
    "presets": [["env", {"modules": false}]],
    "env": {
        "test": {
            "plugins": [
                "transform-es2015-modules-commonjs"
            ]}
        }
    }
}