Add code-coverage workflow to GitHub workflows (#257)

* Add code coverage workflow

* Update artifact version to v4

* Fixed report upload

* Simplified workflow using tox.ini

* Make sure coverage is on right source files

* Bug fix for 0 percent code coverage error

Author: aviruthen

.github/workflows/code-coverage.yml

@@ -0,0 +1,42 @@
+name: "Code Coverage"
+on: 
+  pull_request:
+    branches: [ "main", "master" ]
+
+jobs:
+  coverage:
+    name: Overall Coverage Check
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    permissions: 
+      contents: read
+      pull-requests: write
+    
+    strategy:
+      matrix: 
+        python-version: ["3.11"]
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install tox
+        run: |
+          python -m pip install --upgrade pip
+          pip install tox
+      
+      - name: Run Unit Tests with Coverage
+        run: |
+          tox -e coverage
+      
+      - name: Upload Coverage Report
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: coverage-report
+          path: coverage.xml

tox.ini

@@ -23,3 +23,11 @@ commands =
 description = Run integration tests
 commands =
     pytest test/integration_tests
+
+[testenv:coverage]
+description = Run unit tests with coverage
+deps = 
+    pytest-cov
+    -e .
+commands =
+    pytest test/unit_tests --cov=sagemaker.hyperpod --cov-report=term-missing --cov-report=xml:coverage.xml --cov-fail-under=70