Improve test action by using pytest-xdist

Author: 5yutan5

.github/workflows/test.yml

@@ -13,7 +13,11 @@ defaults:
 
 env:
   PYTHONIOENCODING: 'utf-8'  # For log color
-  PY_COLORS: 1  # For log color with pytest
+
+  # This enable log color of pytest.
+  # --color=yes option is not working on GitHub Action.
+  # See https://github.com/pytest-dev/pytest/issues/1397.
+  PY_COLORS: 1
 
 jobs:
   pytest:
@@ -87,7 +91,12 @@ jobs:
             libopengl0
 
       - name: Run pytest
-        run: poetry run pytest --cov --cov-report=term-missing --cov-report=xml
+        run: |
+          poetry run pytest \
+            --cov \
+            --cov-report=term-missing \
+            --cov-report=xml \
+            -n auto
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v3
@@ -150,7 +159,8 @@ jobs:
             --cov-report=xml \
             --ignore=tests/test_widget_gallery.py \
             --ignore=tests/test_qdarktheme_with_qt.py \
-            -p no:pytest-qt
+            -p no:pytest-qt \
+            -n auto
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v3

poetry.lock

@@ -58,6 +58,7 @@ pytest-randomly = "^3.12.0"
 pytest-qt = "^4.2.0"
 pytest-xvfb = "^2.0.0"
 pytest-mock = "^3.10.0"
+pytest-xdist = "^3.0.2"
 
 [tool.poetry.group.docs.dependencies]
 # Latest of Sphinx and flake8 cause dependency comflict.

pyproject.toml

@@ -116,8 +116,17 @@ def test_load_stylesheet_when_failing_to_detect_system_theme(mocker) -> None:
     qdarktheme.load_stylesheet("auto")
 
 
-def test_clear_cache() -> None:
+def test_clear_cache(mocker) -> None:
     """Verify `clear_cache()`."""
+    from pathlib import Path
+
+    # qdarktheme cache save to system home path.
+    # Cannot clear cache because another tests use cache in home path.
+    # This mock make home path dummy home path.
+    dummy_home_path = Path("__dummy")
+    dummy_home_path.mkdir(exist_ok=True)
+    mocker.patch("pathlib.Path.home", return_value=dummy_home_path)
+
     qdarktheme.load_stylesheet()
     qdarktheme.clear_cache()
     # Test function when there is no cache.