[CI] Run npm test

.github/workflows/smoke.yaml

@@ -2,10 +2,10 @@ name: smoke
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
   schedule: # midnight every day
-    - cron:  '0 0 * * *'
+    - cron: '0 0 * * *'
   workflow_dispatch:
 
 jobs:

.github/workflows/test.yaml

@@ -0,0 +1,33 @@
+name: test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  schedule:
+    - cron: '11 0 * * *' # 11 past midnight every day
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+    env:
+      BASE_REPO: ${{ github.repository }}
+      BRANCH: ${{ github.head_ref }}
+      PR_REPO: ${{ github.event.pull_request.head.repo.full_name }}
+      SHA: ${{ github.sha }}
+    # TODO: drop PR testing under Windows because it's too slow?
+    # if: github.event_name != 'pull_request' && matrix.os != 'windows-latest'
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          cache: npm
+          cache-dependency-path: package.json
+      - run: npm install --omit=optional
+        shell: bash
+      - run: npm test