feat: add jest incl. init setup (#3)

* feat: add jest incl. init setup

---------

Co-authored-by: Anja-Janina Stiefermann <anja.stiefermann@kernpunkt.de>

.github/workflows/test.yml

@@ -17,19 +17,7 @@ jobs:
         uses: actions/setup-node@v3
         with:
           node-version-file: ".nvmrc"
-      - name: Set pnpm version
-        uses: pnpm/action-setup@v2
-        with:
-          run_install: false
-          version: 7
-      - name: Cache node_modules
-        id: node-modules-cache
-        uses: actions/cache@v3
-        with:
-          path: "**/node_modules"
-          key: node-modules-cache-${{ hashFiles('**/pnpm-lock.yaml') }}
       - name: Install dependencies
-        if: steps.node-modules-cache.outputs.cache-hit != 'true'
-        run: pnpm install --no-frozen-lockfile
+        run: yarn install --frozen-lockfile
       - name: Run tests
-        run: pnpm test
+        run: yarn test

jest.config.js

@@ -0,0 +1,5 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: "ts-jest",
+  testEnvironment: "node"
+};

package.json

@@ -15,7 +15,7 @@
     "lint-staged": "lint-staged",
     "prettier": "prettier --write --ignore-unknown .",
     "prettier:check": "prettier --check --ignore-unknown .",
-    "test": "next lint && prettier --check --ignore-unknown ."
+    "test": "yarn lint --strict --fix && yarn jest --passWithNoTests"
   },
   "git": {
     "pre-commit": "lint-staged"
@@ -37,6 +37,7 @@
   "devDependencies": {
     "@tailwindcss/container-queries": "^0.1.1",
     "@tailwindcss/typography": "^0.5.10",
+    "@types/jest": "^29.5.8",
     "@types/node": "20.8.9",
     "@types/react": "18.2.33",
     "@types/react-dom": "18.2.14",
@@ -46,11 +47,13 @@
     "eslint-config-next": "^14.0.0",
     "eslint-config-prettier": "^9.0.0",
     "eslint-plugin-unicorn": "^48.0.1",
+    "jest": "^29.7.0",
     "lint-staged": "^15.0.2",
     "postcss": "^8.4.31",
     "prettier": "3.0.3",
     "prettier-plugin-tailwindcss": "^0.5.6",
     "tailwindcss": "^3.3.5",
+    "ts-jest": "^29.1.1",
     "typescript": "5.2.2"
   }
 }