packages: add jest

.eslintrc.json

@@ -1,4 +1,5 @@
 {
+  "root": true,
   "env": {
     "browser": true,
     "es2021": true,
@@ -16,7 +17,7 @@
     "project": "./tsconfig.json"
   },
   "parser": "@typescript-eslint/parser",
-  "plugins": ["react", "prettier", "@typescript-eslint", "unicorn"],
+  "plugins": ["react", "prettier", "@typescript-eslint", "unicorn", "testing-library"],
   "rules": {
     "linebreak-style": ["error", "windows"],
     "comma-dangle": "off",
@@ -74,5 +75,12 @@
       }
     ],
     "import/no-unresolved": "warn"
-  }
+  },
+  "overrides": [
+    // Only uses Testing Library lint rules in test files
+    {
+      "files": ["**/__tests__/**/*.[jt]s?(x)", "**/?(*.)+(spec|test).[jt]s?(x)"],
+      "extends": ["plugin:testing-library/react"]
+    }
+  ]
 }

jest.config.js

@@ -0,0 +1,25 @@
+// jest.config.js
+const nextJest = require('next/jest');
+
+const createJestConfig = nextJest({
+  // Provide the path to your Next.js app to load next.config.js and .env files in your test environment
+  dir: './',
+});
+
+// Add any custom config to be passed to Jest
+/** @type {import('jest').Config} */
+const customJestConfig = {
+  // Add more setup options before each test is run
+  // setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
+  // if using TypeScript with a baseUrl set to the root directory then you need the below for alias' to work
+  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
+  moduleDirectories: ['node_modules', '<rootDir>/'],
+  moduleNameMapper: {
+    // Handle module aliases (this will be automatically configured for you soon)
+    'lodash-es': 'lodash',
+  },
+  testEnvironment: 'jest-environment-jsdom',
+};
+
+// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
+module.exports = createJestConfig(customJestConfig);

jest.setup.js

@@ -0,0 +1,6 @@
+// Optional: configure or set up a testing framework before each test.
+// If you delete this file, remove `setupFilesAfterEnv` from `jest.config.js`
+
+// Used for __tests__/testing-library.js
+// Learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom/extend-expect';

package.json

@@ -12,7 +12,9 @@
     "precommit": "yarn prettier && yarn lint:fix",
     "graphql:codegen": "graphql-codegen --config .graphqlrc.yml",
     "graphql:schema": "dotenv -e .env.local apollo client:download-schema graphql/crm.schema.graphql",
-    "prepare": "husky install"
+    "prepare": "husky install",
+    "test": "jest --watch",
+    "test:ci": "jest --ci"
   },
   "dependencies": {
     "@ant-design/icons": "^4.7.0",
@@ -44,6 +46,9 @@
     "@graphql-codegen/cli": "2.12.0",
     "@graphql-codegen/typescript": "2.7.3",
     "@graphql-codegen/typescript-operations": "2.5.3",
+    "@testing-library/jest-dom": "^5.16.5",
+    "@testing-library/react": "^13.4.0",
+    "@testing-library/user-event": "^14.4.3",
     "@types/lodash-es": "^4.17.6",
     "@types/node": "18.7.18",
     "@types/react": "18.0.20",
@@ -60,8 +65,11 @@
     "eslint-config-next": "12.3.0",
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-prettier": "^4.2.1",
+    "eslint-plugin-testing-library": "^5.6.4",
     "eslint-plugin-unicorn": "^43.0.2",
     "husky": "^7.0.4",
+    "jest": "^29.0.3",
+    "jest-environment-jsdom": "^29.0.3",
     "msw": "^0.39.2",
     "prettier": "2.7.1",
     "typescript": "4.8.3"