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// @remove-file-on-eject
/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
const fs = require('fs');
const chalk = require('chalk');
const paths = require('../../config/paths');
module.exports = (resolve, rootDir, isEjecting) => {
// Use this instead of `paths.testsSetup` to avoid putting
// an absolute filename into configuration after ejecting.
const setupTestsFile = fs.existsSync(paths.testsSetup)
? '<rootDir>/src/setupTests.js'
: undefined;
// TODO: I don't know if it's safe or not to just use / as path separator
// in Jest configs. We need help from somebody with Windows to determine this.
const config = {
collectCoverageFrom: ['src/**/*.{js,jsx}'],
// TODO: this breaks Yarn PnP on eject.
// But we can't simply emit this because it'll be an absolute path.
// The proper fix is to write jest.config.js on eject instead of a package.json key.
// Then these can always stay as require.resolve()s.
resolver: isEjecting
? 'jest-pnp-resolver'
: require.resolve('jest-pnp-resolver'),
setupFiles: [
isEjecting
? 'react-app-polyfill/jsdom'
: require.resolve('react-app-polyfill/jsdom'),
],
setupTestFrameworkScriptFile: setupTestsFile,
testMatch: [
'<rootDir>/src/**/__tests__/**/*.{js,jsx}',
'<rootDir>/src/**/?((*.)|(*_))(spec|test).{js,jsx,re,ml}',
],
testEnvironment: 'jsdom',
testURL: 'http://localhost',
transform: {
'^.+\\.(re|ml)$': resolve('config/jest/bsLoaderTransform'),
'^.+\\.(js|jsx)$': isEjecting
? '<rootDir>/node_modules/babel-jest'
: resolve('config/jest/babelTransform.js'),
'^.+\\.css$': resolve('config/jest/cssTransform.js'),
'^(?!.*\\.(js|jsx|css|json)$)': resolve('config/jest/fileTransform.js'),
},
transformIgnorePatterns: [
'[/\\\\]node_modules[/\\\\].+\\.(js|jsx)$',
'^.+\\.module\\.(css|sass|scss)$',
],
moduleNameMapper: {
'^react-native$': 'react-native-web',
'^.+\\.module\\.(css|sass|scss)$': 'identity-obj-proxy',
},
moduleFileExtensions: [
'web.js',
'js',
'json',
'web.jsx',
'jsx',
'node',
're',
'ml',
],
};
if (rootDir) {
config.rootDir = rootDir;
}
const overrides = Object.assign({}, require(paths.appPackageJson).jest);
const supportedKeys = [
'collectCoverageFrom',
'coverageReporters',
'coverageThreshold',
'globalSetup',
'globalTeardown',
'resetMocks',
'resetModules',
'snapshotSerializers',
'watchPathIgnorePatterns',
];
if (overrides) {
supportedKeys.forEach(key => {
if (overrides.hasOwnProperty(key)) {
config[key] = overrides[key];
delete overrides[key];
}
});
const unsupportedKeys = Object.keys(overrides);
if (unsupportedKeys.length) {
const isOverridingSetupFile =
unsupportedKeys.indexOf('setupTestFrameworkScriptFile') > -1;
if (isOverridingSetupFile) {
console.error(
chalk.red(
'We detected ' +
chalk.bold('setupTestFrameworkScriptFile') +
' in your package.json.\n\n' +
'Remove it from Jest configuration, and put the initialization code in ' +
chalk.bold('src/setupTests.js') +
'.\nThis file will be loaded automatically.\n'
)
);
} else {
console.error(
chalk.red(
'\nOut of the box, Create React App only supports overriding ' +
'these Jest options:\n\n' +
supportedKeys
.map(key => chalk.bold(' \u2022 ' + key))
.join('\n') +
'.\n\n' +
'These options in your package.json Jest configuration ' +
'are not currently supported by Create React App:\n\n' +
unsupportedKeys
.map(key => chalk.bold(' \u2022 ' + key))
.join('\n') +
'\n\nIf you wish to override other Jest options, you need to ' +
'eject from the default setup. You can do so by running ' +
chalk.bold('npm run eject') +
' but remember that this is a one-way operation. ' +
'You may also file an issue with Create React App to discuss ' +
'supporting more options out of the box.\n'
)
);
}
process.exit(1);
}
}
return config;
};