collect coverage from previous steps

Author: SimonBlanke

.github/workflows/ci.yml

@@ -90,9 +90,23 @@ jobs:
           make install
           make install-test-requirements
 
+      - name: Reinstall in editable mode for coverage
+        run: pip install -e .
+
       - name: Run API smoke tests
-        run: |
+        run: >-
           python -m pytest tests/test_api/ -v --tb=short -p no:warnings
+          --cov=gradient_free_optimizers --cov-report=
+
+      - name: Rename coverage data
+        run: mv .coverage .coverage.api-smoke
+
+      - name: Upload coverage data
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-api-smoke
+          path: .coverage.api-smoke
+          include-hidden-files: true
 
   # ===========================================================================
   # STAGE 3a: Main Tests - OS Matrix
@@ -148,9 +162,26 @@ jobs:
             python -m pip install "numpy>=2.0,<3.0" "pandas>=2.0,<3.0"
           fi
 
+      - name: Reinstall in editable mode for coverage
+        if: matrix.python-version == '3.11' && matrix.os == 'ubuntu-latest' && matrix.numpy-version == '2'
+        run: pip install -e .
+
       - name: Run main tests
-        run: |
+        run: >-
           python -m pytest tests/test_main/ -v --tb=short -p no:warnings
+          ${{ matrix.python-version == '3.11' && matrix.os == 'ubuntu-latest' && matrix.numpy-version == '2' && '--cov=gradient_free_optimizers --cov-report=' || '' }}
+
+      - name: Rename coverage data
+        if: matrix.python-version == '3.11' && matrix.os == 'ubuntu-latest' && matrix.numpy-version == '2'
+        run: mv .coverage .coverage.test-matrix
+
+      - name: Upload coverage data
+        if: matrix.python-version == '3.11' && matrix.os == 'ubuntu-latest' && matrix.numpy-version == '2'
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-test-matrix
+          path: .coverage.test-matrix
+          include-hidden-files: true
 
   # ===========================================================================
   # STAGE 3b: Dependency Isolation Tests - No sklearn
@@ -247,7 +278,7 @@ jobs:
   coverage:
     name: Coverage Report
     runs-on: ubuntu-latest
-    needs: [test-matrix]  # Also depends on: test-no-sklearn, test-no-scipy (currently disabled)
+    needs: [api-smoke-tests, test-matrix]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -257,23 +288,25 @@ jobs:
         with:
           python-version: "3.11"
 
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          python -m pip install build
-          make install
-          make install-test-requirements
+      - name: Install coverage
+        run: pip install "coverage[toml]"
+
+      - name: Download all coverage data
+        uses: actions/download-artifact@v4
+        with:
+          pattern: coverage-*
+          merge-multiple: true
 
-      - name: Run tests with coverage
+      - name: Combine coverage data
         run: |
-          python -m pytest tests/test_main/ tests/test_api/ \
-            --cov=gradient_free_optimizers \
-            --cov-report=term-missing \
-            --cov-report=xml \
-            -p no:warnings
-
-      - name: Coverage Summary Report
-        uses: irongut/CodeCoverageSummary@v1.3.0
+          coverage combine
+          coverage report --show-missing
+          coverage xml
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
         with:
-          filename: coverage.xml
-          badge: true
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage.xml
+          fail_ci_if_error: false
+          verbose: true