ci: Compute coverage only on skore, not anymore on src/ (#1036)

Author: thomass-dev

.github/workflows/backend.yml

@@ -79,15 +79,15 @@ jobs:
         if: ${{ ! matrix.coverage }}
         timeout-minutes: 10
         working-directory: skore/
-        run: python -m pytest -n auto --no-cov src/ tests/
+        run: python -m pytest -n auto src/ tests/ --no-cov
 
       - name: Test with coverage
         if: ${{ matrix.coverage }}
         timeout-minutes: 10
         working-directory: skore/
         run: |
           mkdir coverage
-          python -m pytest -n auto --junitxml=coverage/coverage.xml --cov=skore src/ tests/ | tee coverage/coverage.txt
+          python -m pytest -n auto src/ tests/ --junitxml=coverage/coverage.xml --cov | tee coverage/coverage.txt
 
       - name: Upload coverage reports
         if: ${{ matrix.coverage && (github.event_name == 'pull_request') }}

skore/pyproject.toml

@@ -101,9 +101,6 @@ sphinx = [
 [tool.pytest.ini_options]
 addopts = [
   "--doctest-modules",
-  "--cov=src/",
-  "--cov=tests/",
-  "--cov-branch",
   "--import-mode=importlib",
   "--no-header",
   "--verbosity=2",
@@ -116,9 +113,13 @@ addopts = [
 ]
 
 [tool.coverage.run]
-omit = [
-  "tests/*",
-]
+branch = true
+parallel = true
+source = ["skore"]
+
+[tool.coverage.report]
+omit = ["src/*", "tests/*"]
+show_missing = true
 
 [tool.ruff]
 src = ["skore"]