Update main.yml

.github/workflows/main.yml

@@ -7,12 +7,37 @@ on:
     branches: [master, main]
     tags:
       - "v*.*.*"
+  pull_request:
+    branches: [master, main]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
 jobs:
+
+  run_tests_on_nodejs:
+    name: run tests on nodejs
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 16.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    - run: npm install
+    - run: npm test
+    - name: check coverage
+      if: ${{ success() }}
+      run: npm run check-coverage
+
   docker:
+    needs: run_tests_on_nodejs
     runs-on: ubuntu-latest
     steps:
       - name: Checkout