@namics/test-suite/src/createJestConfig.js

jest test suite

'use strict';

const fs = require('fs');
const chalk = require('chalk');
const path = require('path');
const paths = require('./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'
		: path.resolve(__dirname, 'enzymeConfig.js');

	// in Jest configs. We need help from somebody with Windows to determine this.
	const config = {
		collectCoverageFrom: ['src/**/*.{js,jsx,ts,tsx}'],
		setupFiles: [resolve('./src/polyfills.js')],
		setupTestFrameworkScriptFile: setupTestsFile,
		testMatch: [
			'<rootDir>/src/**/__tests__/**/*.{js,jsx,mjs,ts,tsx}',
			'<rootDir>/src/**/?(*.)(spec|test).{js,jsx,mjs,ts,tsx}',
		],
		testEnvironment: 'node',
		testURL: 'http://localhost',
		transform: {
			'^.+\\.(ts|tsx)$': 'ts-jest',
			'^.+\\.(js|jsx|mjs)$': resolve('./src/babelTransform.js'),
			'^.+\\.css$': resolve('./src/cssTransform.js'),
			'^(?!.*\\.(js|jsx|mjs|ts|tsx|css|json)$)': resolve('./src/fileTransform.js'),
		},
		transformIgnorePatterns: [
			'[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs|ts|tsx)$',
			'^.+\\.module\\.(css|sass|scss)$',
		],
		moduleNameMapper: {
			'^react-native$': 'react-native-web',
			'^.+\\.module\\.(css|sass|scss)$': 'identity-obj-proxy',
		},
		moduleFileExtensions: ['web.js', 'js', 'json', 'web.jsx', 'jsx', 'node', 'mjs', 'ts', 'tsx'],
	};
	if (rootDir) {
		config.rootDir = rootDir;
	}
	const overrides = Object.assign({}, require(paths.appPackageJson).jest);
	const supportedKeys = [
		'collectCoverageFrom',
		'coverageReporters',
		'coverageThreshold',
		'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, Test suite 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 Test suite:\n\n' +
							unsupportedKeys.map((key) => chalk.bold('  \u2022 ' + key)).join('\n')
					)
				);
			}

			process.exit(1);
		}
	}
	return config;
};