[expo-cli] unify and remove duplicated jest configuration (expo#2117)

* refactor: simplify and unify all jest config

* chore: add missing projects to root jest

* refactor: remove package file jest config

* refactor(dev-tools): remove extraneous default config override

* refactor(dev-server): add roots back to jest config

* chore: add test script to root package file

Author: byCedric

jest.config.js

@@ -1,11 +1,19 @@
 module.exports = {
   projects: [
+    require('./packages/babel-preset-cli/jest.config'),
     require('./packages/config/jest.config'),
+    require('./packages/configure-splash-screen/jest.config'),
+    require('./packages/dev-server/jest.config'),
+    require('./packages/dev-tools/jest.config'),
+    require('./packages/expo-cli/jest.config'),
     require('./packages/expo-codemod/jest.config'),
     require('./packages/json-file/jest.config'),
+    require('./packages/metro-config/jest.config'),
     require('./packages/package-manager/jest.config'),
+    require('./packages/plist/jest.config'),
     require('./packages/pwa/jest.config'),
     require('./packages/schemer/jest.config'),
+    require('./packages/uri-scheme/jest.config'),
     require('./packages/webpack-config/jest/unit-test-config'),
     require('./packages/xdl/jest/unit-test-config'),
   ],

jest/babel.config.js

@@ -0,0 +1,11 @@
+module.exports = function (api) {
+  api.cache(true);
+  return {
+    // Only use this when running tests
+    env: {
+      test: {
+        presets: ['../packages/babel-preset-cli'],
+      },
+    },
+  };
+};

jest/unit-test-config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  testEnvironment: 'node',
+  testRegex: '/__tests__/.*(test|spec)\\.[jt]sx?$',
+  transform: {
+    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
+  },
+};

package.json

@@ -10,7 +10,8 @@
     "publish": "echo \"This script is deprecated. Run \\\"node ./scripts/publish.js\\\" instead.\"; exit 1",
     "start": "lerna --ignore \"@expo/{dev-tools,next-adapter,electron-adapter}\" --ignore expo-optimize --ignore pod-install --ignore uri-scheme run watch --parallel",
     "tsc": "echo 'You are trying to run \"tsc\" in the workspace root. Run it from an individual package instead.' && exit 1",
-    "lint": "eslint . --ext js,ts"
+    "lint": "eslint . --ext js,ts",
+    "test": "jest"
   },
   "husky": {
     "hooks": {

packages/babel-preset-cli/jest.config.js

@@ -0,0 +1,7 @@
+const path = require('path');
+
+module.exports = {
+  preset: '../../jest/unit-test-config',
+  rootDir: path.resolve(__dirname),
+  displayName: require('./package').name,
+};

packages/config/jest.config.js

@@ -1,15 +1,8 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('@expo/config/package.json').name,
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
+  roots: ['__mocks__', 'src'],
 };

packages/config/package.json

@@ -11,18 +11,6 @@
     "lint": "eslint .",
     "test": "jest"
   },
-  "jest": {
-    "testEnvironment": "node",
-    "roots": [
-      "__mocks__",
-      "src"
-    ],
-    "moduleFileExtensions": [
-      "js",
-      "json"
-    ],
-    "resetModules": false
-  },
   "repository": {
     "type": "git",
     "url": "https://github.com/expo/expo-cli.git",

packages/configure-splash-screen/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: 'configure-splash-screen',
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/dev-server/jest.config.js

@@ -0,0 +1,8 @@
+const path = require('path');
+
+module.exports = {
+  preset: '../../jest/unit-test-config',
+  rootDir: path.resolve(__dirname),
+  displayName: require('./package').name,
+  roots: ['src'],
+};

packages/dev-server/package.json

@@ -11,12 +11,6 @@
     "lint": "eslint .",
     "test": "jest"
   },
-  "jest": {
-    "testEnvironment": "node",
-    "roots": [
-      "src"
-    ]
-  },
   "repository": {
     "type": "git",
     "url": "https://github.com/expo/expo-cli.git",

packages/dev-tools/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
-  rootDir: path.resolve(__dirname, '.'),
-  displayName: require('@expo/dev-tools/package.json').name,
-  testRegex: `__(tests|testfixtures)__\/.*(\.|-)(test|spec)\.tsx?$`,
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.tsx?$': ['babel-jest', { configFile: require.resolve('./server/babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  preset: '../../jest/unit-test-config',
+  rootDir: path.resolve(__dirname),
+  displayName: require('./package').name,
 };

packages/dev-tools/package.json

@@ -11,14 +11,11 @@
     "clean": "rimraf .next build",
     "prepare": "yarn run clean && yarn run build",
     "start": "yarn dev",
-    "test": "jest --config jest.config.js"
+    "test": "jest"
   },
   "files": [
     "build"
   ],
-  "jest": {
-    "testEnvironment": "node"
-  },
   "dependencies": {
     "@expo/config": "3.2.6",
     "base64url": "3.0.1",

packages/expo-cli/jest.config.js

@@ -0,0 +1,8 @@
+const path = require('path');
+
+module.exports = {
+  preset: '../../jest/unit-test-config',
+  rootDir: path.resolve(__dirname),
+  displayName: require('./package').name,
+  roots: ['__mocks__', 'src'],
+};

packages/expo-cli/package.json

@@ -18,19 +18,6 @@
     "test": "jest",
     "test:watch": "jest --watch"
   },
-  "jest": {
-    "testEnvironment": "node",
-    "roots": [
-      "__mocks__",
-      "src"
-    ],
-    "moduleFileExtensions": [
-      "js",
-      "ts",
-      "json"
-    ],
-    "resetModules": false
-  },
   "bin": {
     "expo": "./bin/expo.js",
     "expo-cli": "./bin/expo.js"

packages/expo-codemod/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('expo-codemod/package.json').name,
-  testRegex: '/__(tests|testfixtures)__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/image-utils/package.json

@@ -25,9 +25,6 @@
   "files": [
     "build"
   ],
-  "jest": {
-    "testEnvironment": "node"
-  },
   "dependencies": {
     "@expo/spawn-async": "1.5.0",
     "fs-extra": "^9.0.0",

packages/json-file/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('@expo/json-file/package.json').name,
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/metro-config/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('@expo/metro-config/package.json').name,
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/package-manager/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('@expo/package-manager/package.json').name,
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/plist/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('@expo/plist/package.json').name,
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/pwa/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('./package.json').name,
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/schemer/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('@expo/schemer/package.json').name,
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/uri-scheme/jest.config.js

@@ -1,15 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname),
-  displayName: require('uri-scheme/package.json').name,
-  testRegex: '/__tests__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('./babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
+  displayName: require('./package').name,
 };

packages/webpack-config/jest/unit-test-config.js

@@ -1,16 +1,8 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname, '..'),
+  displayName: require('../package').name,
   roots: ['src'],
-  displayName: require('@expo/webpack-config/package.json').name,
-  testRegex: '/__(tests|testfixtures)__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('../babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
 };

packages/xdl/jest/unit-test-config.js

@@ -1,17 +1,9 @@
 const path = require('path');
 
 module.exports = {
+  preset: '../../jest/unit-test-config',
   rootDir: path.resolve(__dirname, '..'),
+  displayName: require('../package.json').name,
   roots: ['__mocks__', 'src'],
-  displayName: require('@expo/xdl/package.json').name,
-  testRegex: '/__(tests|testfixtures)__/.*(test|spec)\\.(j|t)sx?$',
-  moduleNameMapper: {
-    '^jest/(.*)': path.join(__dirname, '../../../jest/$1'),
-  },
-  transform: {
-    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: require.resolve('../babel.config.js') }],
-  },
-  testEnvironment: 'node',
-  resetModules: false,
   setupFiles: ['<rootDir>/jest/fs-mock-setup.js'],
 };