Added code coverage checks from unit tests and e2e tests

.github/workflows/coverage-check.yml

@@ -0,0 +1,110 @@
+name: Code Coverage
+
+permissions:
+  contents: read
+
+on: [pull_request, workflow_dispatch]
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    environment: azure-prod
+    env:
+      DATABRICKS_SERVER_HOSTNAME: ${{ secrets.DATABRICKS_HOST }}
+      DATABRICKS_HTTP_PATH: ${{ secrets.TEST_PECO_WAREHOUSE_HTTP_PATH }}
+      DATABRICKS_TOKEN: ${{ secrets.DATABRICKS_TOKEN }}
+      DATABRICKS_CATALOG: peco
+      DATABRICKS_USER: ${{ secrets.TEST_PECO_SP_ID }}
+    steps:
+      #----------------------------------------------
+      #       check-out repo and set-up python
+      #----------------------------------------------
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Needed for coverage comparison
+          ref: ${{ github.event.pull_request.head.ref || github.ref_name }}
+          repository: ${{ github.event.pull_request.head.repo.full_name ||  github.repository }}
+      - name: Set up python
+        id: setup-python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+      #----------------------------------------------
+      #  -----  install & configure poetry  -----
+      #----------------------------------------------
+      - name: Install Poetry
+        uses: snok/install-poetry@v1
+        with:
+          virtualenvs-create: true
+          virtualenvs-in-project: true
+          installer-parallel: true
+
+      #----------------------------------------------
+      #       load cached venv if cache exists
+      #----------------------------------------------
+      - name: Load cached venv
+        id: cached-poetry-dependencies
+        uses: actions/cache@v4
+        with:
+          path: .venv
+          key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ github.event.repository.name }}-${{ hashFiles('**/poetry.lock') }}
+      #----------------------------------------------
+      # install dependencies if cache does not exist
+      #----------------------------------------------
+      - name: Install dependencies
+        if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
+        run: poetry install --no-interaction --no-root
+      #----------------------------------------------
+      # install your root project, if required
+      #----------------------------------------------
+      - name: Install library
+        run: poetry install --no-interaction --all-extras
+      #----------------------------------------------
+      #              run test suite
+      #----------------------------------------------
+      - name: Run tests with coverage
+        continue-on-error: true
+        run: |
+          poetry run python -m pytest \
+            tests/e2e/test_parameterized_queries.py::TestParameterizedQueries::test_readme_example \
+            --cov=src --cov-report=xml --cov-report=term -v
+      #----------------------------------------------
+      #         check for coverage override
+      #----------------------------------------------
+      - name: Check for coverage override
+        id: override
+        run: |
+          OVERRIDE_COMMENT=$(echo "${{ github.event.pull_request.body }}" | grep -E "SKIP_COVERAGE_CHECK\s*=" || echo "")
+          if [ -n "$OVERRIDE_COMMENT" ]; then
+            echo "override=true" >> $GITHUB_OUTPUT
+            REASON=$(echo "$OVERRIDE_COMMENT" | sed -E 's/.*SKIP_COVERAGE_CHECK\s*=\s*(.+)/\1/')
+            echo "reason=$REASON" >> $GITHUB_OUTPUT
+            echo "Coverage override found in PR description: $REASON"
+          else
+            echo "override=false" >> $GITHUB_OUTPUT
+            echo "No coverage override found"
+          fi
+      #----------------------------------------------
+      #         check coverage percentage
+      #----------------------------------------------
+      - name: Report coverage percentage
+        run: |
+          COVERAGE_FILE="coverage.xml"
+          if [ ! -f "$COVERAGE_FILE" ]; then
+            echo "ERROR: Coverage file not found at $COVERAGE_FILE"
+            exit 1
+          fi
+
+          # Install xmllint if not available
+          if ! command -v xmllint &> /dev/null; then
+            sudo apt-get update && sudo apt-get install -y libxml2-utils
+          fi
+
+          COVERED=$(xmllint --xpath "string(//coverage/@lines-covered)" "$COVERAGE_FILE")
+          TOTAL=$(xmllint --xpath "string(//coverage/@lines-valid)" "$COVERAGE_FILE")
+
+          # Calculate percentage using Python for precision
+          PERCENTAGE=$(python3 -c "covered=${COVERED}; total=${TOTAL}; print(round((covered/total)*100, 2))")
+
+          echo "📊 Branch Coverage: ${PERCENTAGE}%"