Add test workflow

Author: mcecode

.github/workflows/lint.yml

@@ -8,6 +8,7 @@ on:
 
 jobs:
   lint:
+    name: Lint
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository

.github/workflows/test.yml

@@ -0,0 +1,33 @@
+name: Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    name: Test on ${{ matrix.os }} using Node.js v${{ matrix.node }}
+    strategy:
+      matrix:
+        os: [windows-latest, macos-latest, ubuntu-latest]
+        # This should also include Node.js v20, but snapshot testing is only
+        # available in Node.js v22.3 or later.
+        node: [22, 24]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+      - name: Setup Node.js
+        uses: actions/setup-node@v5
+        with:
+          node-version: ${{ matrix.node }}
+          package-manager-cache: false
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: latest
+          run_install: true
+      - name: Run tests
+        run: pnpm test