Add some simple tests

.gitea/workflows/tests.yml

@@ -0,0 +1,31 @@
+name: Run tests
+on:
+  push:
+    paths:
+      - 'src/**.ts'
+      - 'src/**.tsx'
+  pull_request:
+    paths:
+      - 'src/**.ts'
+      - 'src/**.tsx'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    env:
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up node
+      uses: https://github.com/actions/setup-node@v4
+      with:
+        node-version: 21
+        cache: npm
+    
+    - name: deps
+      run: npm install
+
+    - name: Test
+      run: npm run test
+