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lobsterkatielobsterkatie
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ref(dev): Centralize jest config (#4907)
Currently, we configure jest using a mix of `package.json` entries and `jest.config.js` files, and there's a great deal of repetition between configs. To make things DRYer and easier to update (as will happen in future PRs), this aims to fix that by creating a centralized jest config from which all others can inherit. To facilitate this inheritance, all config has been removed from `package.json` files and moved into `jest.config.js` files. This change was done in a few distinct stages: - Extracting the config which was identical across many packages into a central config file, and fixing a mistake they all contained, namely that they were using the regular tsconfig file rather than the test-specific one. - In the packages which were using exactly that config, creating a new `jest.config.js` file and inheriting directly from the central jest config with no changes. - In the packages whose config varied only slightly from the boilerplate config, creating a new `jest.config.js` file and inheriting from the central file with small changes. This also required adding `.tsx` files to the central config. - In the browser package, moving the existing `jest.config.js` for the unit tests to the repo root level and refactoring it to inherit from the central file. This also required specifying a coverage directory in the central config and modifying the browser package's yarn test commands. - In the node integration test package, refactoring the existing `jest.config.js` to inherit from the central file. This also required creating a test-specific tsconfig to match the one in other packages. - Finally, making a small optimization (narrowing the scope of where to look for tests) in the now universally-used central config.
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‎jest.config.js

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module.exports = {
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rootDir: process.cwd(),
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collectCoverage: true,
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transform: {
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'^.+\\.ts$': 'ts-jest',
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'^.+\\.tsx$': 'ts-jest',
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},
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coverageDirectory: '<rootDir>/coverage',
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moduleFileExtensions: ['js', 'ts', 'tsx'],
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testEnvironment: 'node',
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testMatch: ['<rootDir>/**/*.test.ts', '<rootDir>/**/*.test.tsx'],
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globals: {
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'ts-jest': {
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tsconfig: '<rootDir>/tsconfig.test.json',
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diagnostics: false,
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},
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},
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testPathIgnorePatterns: ['<rootDir>/build/', '<rootDir>/node_modules/'],
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};

‎packages/browser/jest.config.js

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const baseConfig = require('../../jest.config.js');
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module.exports = {
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...baseConfig,
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testEnvironment: 'jsdom',
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testMatch: ['<rootDir>/test/unit/**/*.test.ts'],
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};

‎packages/browser/package.json

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"size:check:es5": "cat build/bundles/bundle.min.js | gzip -9 | wc -c | awk '{$1=$1/1024; print \"ES5: \",$1,\"kB\";}'",
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"size:check:es6": "cat build/bundles/bundle.es6.min.js | gzip -9 | wc -c | awk '{$1=$1/1024; print \"ES6: \",$1,\"kB\";}'",
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"test": "run-s test:unit",
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"test:unit": "jest --config test/unit/jest.config.js",
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"test:unit": "jest",
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"test:integration": "test/integration/run.js",
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"test:integration:checkbrowsers": "node scripts/checkbrowsers.js",
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"test:package": "node test/package/npm-build.js && rm test/package/tmp.js",
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"test:unit:watch": "jest --config test/unit/jest.config.js --watch",
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"test:unit:watch": "jest --watch",
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"test:integration:watch": "test/integration/run.js --watch"
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},
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"volta": {

‎packages/browser/test/unit/jest.config.js

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‎packages/core/jest.config.js

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module.exports = require('../../jest.config.js');

‎packages/core/package.json

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"volta": {
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"extends": "../../package.json"
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},
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest"
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},
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"moduleFileExtensions": [
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"js",
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"ts"
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],
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"testEnvironment": "node",
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"testMatch": [
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"**/*.test.ts"
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],
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"globals": {
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"ts-jest": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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}
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}
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},
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"sideEffects": false
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}

‎packages/gatsby/jest.config.js

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const baseConfig = require('../../jest.config.js');
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module.exports = {
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...baseConfig,
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setupFiles: ['<rootDir>/test/setEnvVars.ts'],
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testEnvironment: 'jsdom',
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};

‎packages/gatsby/package.json

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"volta": {
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"extends": "../../package.json"
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},
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest",
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"^.+\\.tsx$": "ts-jest"
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},
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"moduleFileExtensions": [
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"js",
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"ts",
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"tsx"
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],
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"testEnvironment": "jsdom",
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"testMatch": [
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"**/*.test.ts",
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"**/*.test.tsx"
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],
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"globals": {
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"ts-jest": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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}
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},
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"setupFiles": [
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"<rootDir>/test/setEnvVars.ts"
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]
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},
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"sideEffects": false
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}

‎packages/hub/jest.config.js

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module.exports = require('../../jest.config.js');

‎packages/hub/package.json

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"volta": {
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"extends": "../../package.json"
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},
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest"
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},
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"moduleFileExtensions": [
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"js",
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"ts"
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],
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"testEnvironment": "node",
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"testMatch": [
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"**/*.test.ts"
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],
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"globals": {
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"ts-jest": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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}
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}
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},
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"sideEffects": false
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}

‎packages/integrations/jest.config.js

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module.exports = require('../../jest.config.js');

‎packages/integrations/package.json

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"volta": {
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"extends": "../../package.json"
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},
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest"
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},
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"moduleFileExtensions": [
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"js",
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"ts"
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],
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"testEnvironment": "node",
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"testMatch": [
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"**/*.test.ts"
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],
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"globals": {
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"ts-jest": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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}
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}
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},
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"sideEffects": false
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}

‎packages/minimal/jest.config.js

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module.exports = require('../../jest.config.js');

‎packages/minimal/package.json

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"volta": {
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"extends": "../../package.json"
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},
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest"
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},
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"moduleFileExtensions": [
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"js",
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"ts"
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],
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"testEnvironment": "node",
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"testMatch": [
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"**/*.test.ts"
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],
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"globals": {
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"ts-jest": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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}
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}
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},
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"sideEffects": false
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}

‎packages/nextjs/jest.config.js

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module.exports = require('../../jest.config.js');

‎packages/nextjs/package.json

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"volta": {
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"extends": "../../package.json"
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},
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest"
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},
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"moduleFileExtensions": [
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"js",
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"ts"
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],
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"testEnvironment": "node",
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"testMatch": [
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"**/*.test.ts"
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],
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"globals": {
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"ts-jest": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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}
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}
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},
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"sideEffects": [
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"./cjs/index.server.js",
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"./esm/index.server.js",

‎packages/node-integration-tests/jest.config.js

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const config = {
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transform: {
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'^.+\\.ts$': 'ts-jest',
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},
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testEnvironment: 'node',
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const baseConfig = require('../../jest.config.js');
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module.exports = {
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...baseConfig,
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testMatch: ['**/test.ts'],
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moduleFileExtensions: ['js', 'ts'],
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};
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module.exports = config;

‎packages/node-integration-tests/tsconfig.json

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{
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"extends": "../../tsconfig.json",
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"include": ["**/*.ts"],
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"compilerOptions": {
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// package-specific options
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"esModuleInterop": true,
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"types": ["jest", "node"]
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},
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"include": ["**/*.ts", "jest.config.js"],
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"exclude": ["node_modules"]
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"types": ["node"]
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}
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}

‎packages/node-integration-tests/tsconfig.test.json

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{
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"extends": "./tsconfig.json",
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"include": ["**/*.ts"],
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"compilerOptions": {
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// should include all types from `./tsconfig.json` plus types for all test frameworks used
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"types": ["node", "jest"]
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// other package-specific, test-specific options
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}
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}

‎packages/node/jest.config.js

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module.exports = require('../../jest.config.js');

‎packages/node/package.json

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},
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"volta": {
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"extends": "../../package.json"
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},
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest"
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},
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"moduleFileExtensions": [
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"js",
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],
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"testEnvironment": "node",
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"testMatch": [
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"**/*.test.ts"
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],
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"globals": {
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"ts-jest": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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}
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}
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}
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}

‎packages/react/jest.config.js

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const baseConfig = require('../../jest.config.js');
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module.exports = {
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...baseConfig,
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testEnvironment: 'jsdom',
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};

‎packages/react/package.json

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"volta": {
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"extends": "../../package.json"
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},
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest",
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"^.+\\.tsx$": "ts-jest"
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},
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"moduleFileExtensions": [
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"testEnvironment": "jsdom",
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"testMatch": [
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"**/*.test.tsx"
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],
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"globals": {
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"ts-jest": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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},
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"sideEffects": false
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}

‎packages/serverless/jest.config.js

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module.exports = require('../../jest.config.js');

‎packages/serverless/package.json

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"volta": {
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"extends": "../../package.json"
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},
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"sideEffects": false,
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"jest": {
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"collectCoverage": true,
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"transform": {
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"^.+\\.ts$": "ts-jest"
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"moduleFileExtensions": [
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],
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"testEnvironment": "node",
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"testMatch": [
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"globals": {
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"tsConfig": "./tsconfig.json",
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"diagnostics": false
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}
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}
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"sideEffects": false
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}

‎packages/tracing/jest.config.js

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module.exports = require('../../jest.config.js');

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