Fix handling of cov files

.github/actions/report-coverage/action.yml

@@ -8,7 +8,6 @@ inputs:
 runs:
   using: "composite"
   steps:
-      - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
           # Use latest Python, so it understands all syntax.

.github/actions/upload-coverage/action.yml

@@ -1,16 +1,18 @@
 name: "Upload Coverage"
 description: "Upload the coverage report(s) for this job"
-inputs:
-  file_pattern:
-    description: "The coverage file pattern"
-    default: ".coverage"
 
 runs:
   using: "composite"
   steps:
+    - name: Rename coverage file
+      shell: bash
+      run: |
+        if [ -f ".coverage" ]; then
+          mv .coverage ".coverage.-$$-$RANDOM"
+        fi
     - name: Upload coverage data
       uses: actions/upload-artifact@v3
       with:
         name: coverage-data
-        path: ${{inputs.file_pattern}}
+        path: ".coverage.*"
         if-no-files-found: ignore

.github/workflows/tests.yml

@@ -280,12 +280,15 @@ jobs:
 
   coverage_test:
     name: Test coverage
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/base-setup
       - run: |
-          pip install coverage pytest
+          pip install coverage[toml] pytest
           python -m coverage run -m pytest foobar.py
           ls -a
       - uses: ./.github/actions/upload-coverage

pyproject.toml

@@ -97,3 +97,7 @@ unfixable = [
   # Don't touch noqa lines
   "RUF100",
 ]
+
+[tool.coverage.run]
+relative_files = true
+source = ["foobar"]