[SYSTEMDS-3776] Code coverage in GitHub Actions (Python)

This commit hopefully adds code coverage for the
Python API. It should activate after merging to
main.

Closes #2263

.github/workflows/javaTests.yml

@@ -147,7 +147,7 @@ jobs:
       run: mvn jacoco:report
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v4.2.0
       if: github.repository_owner == 'apache'
       with:
         fail_ci_if_error: false

.github/workflows/python.yml

@@ -128,15 +128,15 @@ jobs:
         export SYSDS_QUIET=1
         export LOG4JPROP=$SYSTEMDS_ROOT/src/test/resources/log4j.properties
         cd src/main/python
-        unittest-parallel -t . -s tests -v
+        unittest-parallel -t . -s tests -v --coverage-branch --coverage-xml .coverage.xml  --coverage-source systemds
         # python -m unittest discover -s tests -p 'test_*.py'
         echo "Exit Status: " $?
     
     - name: Run all python tests no environment
       run: |
         export LOG4JPROP=$(pwd)/src/test/resources/log4j.properties
         cd src/main/python
-        unittest-parallel -t . -s tests -v
+        unittest-parallel -t . -s tests -v --coverage-branch --coverage-xml .coverage.xml  --coverage-source systemds
         # python -m unittest discover -s tests -p 'test_*.py'
         echo "Exit Status: " $?
 
@@ -154,3 +154,11 @@ jobs:
     - name: Check formatting according to Black (src/main/python/tests)
       run: |
         black --check src/main/python/tests
+
+    - name: Upload coverage to Codecov
+      uses: codecov/[email protected]
+      if: github.repository_owner == 'apache'
+      env:
+        fail_ci_if_error: false
+        files: src/main/python/.coverage.xml
+        token: ${{ secrets.CODECOV_TOKEN }}

src/main/python/.gitignore

@@ -52,3 +52,8 @@ systemds/SystemDS.jar
 
 # tutorial
 systemds/examples/tutorials/*
+
+# test coverage
+.coverage
+.coverage.xml
+