ci: add c++ coverage

.github/workflows/ci.yaml

@@ -55,7 +55,7 @@ jobs:
           channel-priority: true
 
       - name: install build deps
-        run: mamba install scip gurobi
+        run: mamba install scip gurobi gcovr
 
       - name: add gurobi license
         shell: bash
@@ -70,17 +70,23 @@ jobs:
         run: |
           python -m pip install -U pip
           python -m pip install -e .[dev]
+          python setup.py build_ext --inplace  # required for C coverage
         env:
           CYTHON_TRACE: 1 # enable coverage of cython code
+          CFLAGS: '-coverage' # enable coverage of C code
 
       - name: run tests
-        run: pytest --color yes -v --cov ilpy --cov-report=xml
+        run: |
+          pytest --color yes -v --cov ilpy --cov-report=xml
+          gcovr --xml coverage_cpp.xml  # generate C coverage report
         env:
           GRB_LICENSE_FILE: ${{ steps.write-license.outputs.grb_license_file }}
 
       - name: upload coverage
         uses: codecov/codecov-action@v3
-
+        with:
+          files: ./coverage.xml,./coverage_cpp.xml
+
   # we only deploy the sdist to PyPI, the wheel is still complicated
   deploy-sdist:
     if: startsWith(github.ref, 'refs/tags')

.gitignore

@@ -10,3 +10,5 @@ ilpy/wrapper.cpp
 build
 dist
 .vscode
+coverage.xml
+coverage_cpp.xml

setup.py

@@ -6,7 +6,7 @@
 from setuptools.extension import Extension
 
 # enable test coverage tracing if CYTHON_TRACE is set to a non-zero value
-CYTHON_TRACE = int(os.getenv("CYTHON_TRACE", "0") not in ("0", "False"))
+CYTHON_TRACE = int(os.getenv("CYTHON_TRACE") in ("1", "True"))
 
 libraries = ["libscip"] if os.name == "nt" else ["scip"]
 include_dirs = ["ilpy/impl"]

tests/test_constraint.py

@@ -0,0 +1,7 @@
+import ilpy
+
+
+def test_constraint() -> None:
+    constraint = ilpy.Constraint()
+    constraint.set_coefficient(0, 1)
+    constraint.set_quadratic_coefficient(1, 1, 1)