api: set up tests with jest and supertest (#39)

.github/workflows/pr_test_api.yml

@@ -0,0 +1,50 @@
+name: Test api
+
+on:
+  pull_request:
+    branches: ["main"]
+    paths:
+      - "api/**"
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  # Run api tests
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - uses: pnpm/action-setup@v3
+        name: Install pnpm
+        with:
+          version: 8
+          run_install: false
+
+      - name: Get pnpm store directory
+        shell: bash
+        run: |
+          echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
+
+      - uses: actions/cache@v4
+        name: Setup pnpm cache
+        with:
+          path: ${{ env.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+
+      - name: Install dependencies and run tests
+        shell: bash
+        run: |
+          cd api/ && pnpm install && pnpm run test

api/package.json

@@ -4,6 +4,7 @@
   "description": "",
   "main": "index.js",
   "scripts": {
+    "test": "jest",
     "start": "node server.js",
     "dev": "nodemon server.js"
   },
@@ -15,6 +16,14 @@
     "express": "^4.19.2"
   },
   "devDependencies": {
-    "nodemon": "^3.1.0"
+    "jest": "^29.7.0",
+    "nodemon": "^3.1.0",
+    "supertest": "^6.3.4"
+  },
+  "jest": {
+    "testEnvironment": "node",
+    "coveragePathIgnorePatterns": [
+      "/node_modules/"
+    ]
   }
 }