Add Windows and macOS test runs (#366)

Author: lordmauve

.github/workflows/test.yml

@@ -2,12 +2,14 @@ name: "Run tests"
 on: [pull_request, workflow_call]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    env:
+      SDL_AUDIODRIVER: dummy
+      SDL_VIDEODRIVER: dummy
     steps:
-    - name: Install xvfb and pulseaudio
-      run: |
-          sudo apt update
-          sudo apt install -y xvfb pulseaudio
     - uses: actions/checkout@v4
     - name: Set up Python 3.x
       uses: actions/setup-python@v5
@@ -25,13 +27,8 @@ jobs:
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # stricter tests for mission critical code
         flake8 --count src test
-    - name: Run tests under xvfb
-      run: |
-        export XDG_RUNTIME_DIR="$RUNNER_TEMP"
-        pulseaudio -D --start
-        xvfb-run --auto-servernum pytest
-    - name: Cleanup xvfb pidx
-      uses: bcomnes/cleanup-xvfb@v1
+    - name: Run tests
+      run: pytest
     - uses: actions/upload-artifact@v4
       if: ${{ failure() }}
       with:

src/pgzero/runner.py

@@ -115,7 +115,7 @@ def load_and_run(path, *, fps: bool = False):
             src = f.read()
     except FileNotFoundError:
         raise NoMainModule(f"Error: {path} does not exist.")
-    except IsADirectoryError:
+    except (IsADirectoryError, PermissionError):
         name = os.path.basename(path)
         for candidate in (
             '__main__.py',

src/pgzero/storage.py

@@ -65,7 +65,7 @@ def _ensure_save_path(cls):
         """Ensure that the directory for all save game data exists."""
         try:
             os.makedirs(cls.STORAGE_DIR)
-        except IsADirectoryError:
+        except (IsADirectoryError, PermissionError):
             pass
         except FileExistsError:
             pass