Jest Multi Project Example

jest-eslint.config.js

const { resolve } = require('path')
const root = resolve(__dirname, '..')
module.exports = {
	rootDir: root,
	displayName: 'eslint',
	runner: 'jest-runner-eslint',
	testMatch: ['<rootDir>/src/**/*.js', '<rootDir>/config/*.js'],
}

jest-lint.config.js

module.exports = {
	projects: [
		'<rootDir>/jest-eslint.config.js',
		'<rootDir>/jest-prettier.config.js',
	],
}

jest-prettier.config.js

const { resolve } = require('path')
const root = resolve(__dirname, '..')
module.exports = {
	rootDir: root,
	displayName: 'prettier',
	runner: 'jest-runner-write-prettier',
	testMatch: ['<rootDir>/src/**/*.js', '<rootDir>/config/*.js', '*.js'],
	moduleFileExtensions: ['js'],
}

jest-test.config.js

const { resolve } = require('path')
const root = resolve(__dirname, '..')
module.exports = {
	rootDir: root,
	displayName: 'test',
	testPathIgnorePatterns: ['/node_modules/', '/cypress/'],
	collectCoverageFrom: [
		'src/**/*.js',
		'!src/index.js',
		'!**/fixtures/**/*.js',
		'!**/**/test-setup.js',
		'!**/**/*.spec.js',
		'!**/**/*.mock.js',
		'!**/**/*.test.js',
	],
	coverageThreshold: {
		global: {
			statements: 90,
			branches: 75,
			functions: 85,
			lines: 90,
		},
	},
	setupTestFrameworkScriptFile: '<rootDir>/jest-setup.js',
	testEnvironment: 'jest-environment-jsdom-global',
	transform: {
		'^.+\\.jsx?$': 'babel-jest',
		'.*': '@brimstone/jest-static-assets-mocker',
	},
	snapshotSerializers: [
		'jest-glamor-react',
		'enzyme-to-json/serializer',
		'snapshot-diff-serializer',
	],
	transformIgnorePatterns: [
		'node_modules/(?!(css-wipe|@wf-titan/kashyyyk-theme|@inferno/effigy))',
	],
	testURL: 'https://example.com/',
}

jest.config.js

module.exports = {
	projects: [
		'<rootDir>/jest-test.config.js',
		'<rootDir>/jest-eslint.config.js',
		'<rootDir>/jest-prettier.config.js',
	],
}