Update Jest to work across entire monorepo

babel.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+  presets: ['@babel/preset-env', '@babel/preset-react', '@babel/preset-typescript'],
+  plugins: ['@babel/plugin-transform-runtime'],
+};

jest.config.base.js

@@ -0,0 +1,9 @@
+// A base config for all our Jest test projects to use
+module.exports = {
+  testEnvironment: 'node',
+  verbose: true,
+  setupFiles: ['<rootDir>/jest.setup.js'],
+  coverageDirectory: '<rootDir>/coverage',
+  moduleDirectories: ['node_modules'],
+  automock: false,
+};

jest.config.js

@@ -0,0 +1,13 @@
+const baseConfig = require('./jest.config.base');
+
+module.exports = {
+  ...baseConfig,
+  projects: [
+    // Our legacy backend tests, slowly being migrated to microservices
+    '<rootDir>/test/jest.config.js',
+    // Our new microservices
+    '<rootDir>/src/api/**/jest.config.js',
+    // Our front-end
+    '<rootDir>/src/web/jest.config.js',
+  ],
+};

test/lib/setupJest.js → jest.setup.js

@@ -1,3 +1,4 @@
+/* global jest */
 const fetch = require('jest-fetch-mock');
 
 jest.setMock('node-fetch', fetch);

package.json

@@ -3,23 +3,6 @@
   "private": true,
   "version": "1.7.0",
   "description": "A tool for tracking blogs in orbit around Seneca's open source involvement",
-  "jest": {
-    "testEnvironment": "node",
-    "coveragePathIgnorePatterns": [
-      "/node_modules/",
-      "<rootDir>/src/web/.next",
-      "<rootDir>/src/web/out"
-    ],
-    "automock": false,
-    "setupFiles": [
-      "./test/lib/setupJest.js"
-    ],
-    "testPathIgnorePatterns": [
-      "/node_modules/",
-      "<rootDir>/src/web/.next",
-      "<rootDir>/src/web/out"
-    ]
-  },
   "bin": {
     "add-feed": "./tools/add-feed.js",
     "html-elements": "./tools/html-elements.js"
@@ -42,7 +25,7 @@
     "prettier-check": "prettier --check \"./**/*.{md,jsx,json,html,css,js,yml}\"",
     "pretest": "npm run lint",
     "test": "npm run jest",
-    "jest": "cross-env NODE_ENV=test LOG_LEVEL=error MOCK_REDIS=1 FEED_URL_INTERVAL_MS=200 jest --",
+    "jest": "cross-env NODE_ENV=test LOG_LEVEL=error MOCK_REDIS=1 FEED_URL_INTERVAL_MS=200 jest -c jest.config.js --",
     "coverage": "cross-env NODE_ENV=test LOG_LEVEL=silent MOCK_REDIS=1 FEED_URL_INTERVAL_MS=200 jest --collectCoverage --",
     "jest-watch": "cross-env MOCK_REDIS=1 jest --watch --",
     "start": "node src/backend",
@@ -109,9 +92,15 @@
     "valid-url": "1.0.9"
   },
   "devDependencies": {
+    "@babel/plugin-transform-runtime": "7.13.7",
+    "@babel/preset-env": "7.13.5",
+    "@babel/preset-react": "7.12.13",
+    "@babel/preset-typescript": "7.13.0",
+    "@types/jest": "26.0.20",
     "@typescript-eslint/eslint-plugin": "4.15.1",
     "@typescript-eslint/parser": "4.15.1",
     "@vercel/node": "1.9.0",
+    "babel-jest": "26.6.3",
     "cross-env": "7.0.3",
     "eslint": "7.20.0",
     "eslint-config-airbnb": "18.2.1",
@@ -130,8 +119,10 @@
     "npm-run-all": "4.1.5",
     "prettier": "2.2.1",
     "pretty-quick": "3.1.0",
+    "react-test-renderer": "17.0.1",
     "run.env": "1.1.0",
-    "supertest": "6.1.3"
+    "supertest": "6.1.3",
+    "ts-jest": "26.5.2"
   },
   "engines": {
     "node": ">=12.0.0"

src/api/auth/jest.config.js

@@ -1,5 +1,9 @@
+const baseConfig = require('../../../jest.config.base');
+
 module.exports = {
-  testPathIgnorePatterns: ['/node_modules/'],
-  testMatch: ['<rootDir>/test/unit/**/*.test.js'],
-  verbose: true,
+  ...baseConfig,
+  rootDir: '../../..',
+  setupFiles: ['<rootDir>/jest.setup.js', '<rootDir>/src/api/auth/jest.setup.js'],
+  testMatch: ['<rootDir>/src/api/auth/test/unit/**/*.test.js'],
+  collectCoverageFrom: ['<rootDir>/src/api/auth/server.js', '<rootDir>/src/api/auth/src/**/*.js'],
 };

src/api/auth/jest.setup.js

@@ -0,0 +1,9 @@
+// NOTE: you need to run the auth and login services in docker for these to work
+
+const path = require('path');
+// NOTE: you need to copy ../env.development to ../.env and run services
+const result = require('dotenv').config({ path: path.join(__dirname, '../.env') });
+
+if (result.error) {
+  throw result.error;
+}

src/api/auth/test/unit/index.test.js

@@ -1,12 +1,4 @@
 // NOTE: you need to run the auth and login services in docker for these to work
-
-// NOTE: you need to copy ../env.development to ../.env and run services
-const result = require('dotenv').config({ path: '../.env' });
-
-if (result.error) {
-  throw result.error;
-}
-
 const request = require('supertest');
 const { app } = require('../../src');
 

src/web/jest.config.js

@@ -0,0 +1,10 @@
+const baseConfig = require('../../jest.config.base');
+
+module.exports = {
+  ...baseConfig,
+  preset: 'ts-jest',
+  rootDir: '../..',
+  testMatch: ['<rootDir>/src/web/src/**/*.test.{ts,tsx}'],
+  testPathIgnorePatterns: ['<rootDir>/src/web/.next', '<rootDir>/src/web/out'],
+  collectCoverageFrom: ['src/**/*{ts,tsx}'],
+};

test/jest.config.js

@@ -0,0 +1,8 @@
+const baseConfig = require('../jest.config.base');
+
+module.exports = {
+  ...baseConfig,
+  rootDir: '../',
+  testMatch: ['<rootDir>/test/**/*.test.js'],
+  collectCoverageFrom: ['<rootDir>/src/backend/**/*.js'],
+};