Add test CI workflow and caching (orcasound#77)

* Add test CI workflow and caching

* Remove cache-hit skip for setup-node

* Move re-used code into separate composite actions

* Fix errors

.github/actions/build/action.yml

@@ -0,0 +1,21 @@
+name: 'Build'
+description: 'Builds project'
+runs:
+  using: 'composite'
+  steps:
+    # Based on https://nextjs.org/docs/messages/no-cache#github-actions
+    - uses: actions/cache@v2
+      id: cache-build
+      with:
+        path: |
+          ~/.npm
+          ${{ github.workspace }}/.next/cache
+        # Generate a new cache whenever packages or source files change.
+        key: ${{ runner.os }}-nextjs-${{ hashFiles('**/package-lock.json') }}-${{ hashFiles('**.[jt]s', '**.[jt]sx') }}
+        # If source files changed but packages didn't, rebuild from a prior cache.
+        restore-keys: |
+          ${{ runner.os }}-nextjs-${{ hashFiles('**/package-lock.json') }}-
+    - name: Build project
+      if: steps.cache-build.outputs.cache-hit != 'true'
+      run: npm run build
+      shell: bash

.github/actions/setup/action.yml

@@ -0,0 +1,14 @@
+name: 'Setup'
+description: 'Setup node and dependencies'
+runs:
+  using: 'composite'
+  steps:
+    - name: Setup node
+      id: setup-node
+      uses: actions/setup-node@v2
+      with:
+        node-version-file: '.node-version'
+        cache: 'npm'
+    - name: Install dependencies
+      run: npm ci
+      shell: bash

.github/workflows/ci.yml

@@ -7,45 +7,36 @@ on:
     branches: [main]
 
 jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/setup
+      - uses: ./.github/actions/build
+  test:
+    name: Test
+    needs: [build]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/setup
+      - uses: ./.github/actions/build
+      - name: Run tests
+        run: npm run test
   format:
     name: Format
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Setup node
-        uses: actions/setup-node@v2
-        with:
-          node-version-file: '.node-version'
-          cache: 'npm'
-      - name: Install dependencies
-        run: npm ci
+      - uses: ./.github/actions/setup
       - name: Run prettier
         run: npm run format:ci
   lint:
     name: Lint
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Setup node
-        uses: actions/setup-node@v2
-        with:
-          node-version-file: '.node-version'
-          cache: 'npm'
-      - name: Install dependencies
-        run: npm ci
+      - uses: ./.github/actions/setup
       - name: Run eslint
         run: npm run lint:ci
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Setup node
-        uses: actions/setup-node@v2
-        with:
-          node-version-file: '.node-version'
-          cache: 'npm'
-      - name: Install dependencies
-        run: npm ci
-      - name: Build project
-        run: npm run build --if-present

package.json

@@ -6,6 +6,7 @@
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
+    "test": "echo 'No tests configured'",
     "lint": "next lint",
     "lint:fix": "next lint --fix",
     "lint:ci": "npm run lint -- --max-warnings 0",