chore(core): Add jest config back to rwjs/core

packages/core/config/__tests__/webpack.common.test.js

@@ -1,4 +1,7 @@
-import { getEnvVars } from '../webpack.common'
+// @NOTE
+// No babel in the package, so use standard node syntax
+
+const { getEnvVars } = require('../webpack.common')
 
 jest.mock('@redwoodjs/internal', () => {
   return {

packages/core/jest.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/*.test.[jt]s?(x)'],
+  testPathIgnorePatterns: ['fixtures', 'dist'],
+  testTimeout: 15000,
+}

packages/core/package.json

@@ -29,7 +29,9 @@
   "scripts": {
     "build": "yarn build:js",
     "build:js": "babel src -d dist --extensions \".js,.ts,.tsx\"",
-    "prepublishOnly": "NODE_ENV=production yarn build"
+    "prepublishOnly": "NODE_ENV=production yarn build",
+    "test": "jest",
+    "test:watch": "yarn test --watch"
   },
   "dependencies": {
     "@babel/cli": "7.16.7",
@@ -87,7 +89,8 @@
     "webpack-retry-chunk-load-plugin": "3.0.0"
   },
   "devDependencies": {
-    "@types/rimraf": "3.0.2"
+    "@types/rimraf": "3.0.2",
+    "jest": "27.5.1"
   },
   "gitHead": "3905ed045508b861b495f8d5630d76c7a157d8f1"
 }

yarn.lock

@@ -6097,6 +6097,7 @@ __metadata:
     graphql: 16.4.0
     graphql-tag: 2.12.6
     html-webpack-plugin: 5.5.0
+    jest: 27.5.1
     lodash.escaperegexp: 4.1.2
     mini-css-extract-plugin: 2.6.0
     nodemon: 2.0.16