test: use pytest-xdist to run on multiple cores in parallel

Author: eginhard

Makefile

@@ -7,43 +7,43 @@ help:
 target_dirs := tests TTS notebooks recipes
 
 test:	## run tests.
-	coverage run -m pytest -x -v --durations=0 tests
+	pytest -x -v -n auto --durations=0 tests
 
 test_vocoder:	## run vocoder tests.
-	coverage run -m pytest -x -v --durations=0 tests/vocoder_tests
+	pytest -x -v -n auto --durations=0 tests/vocoder_tests
 
 test_tts:	## run tts tests.
-	coverage run -m pytest -x -v --durations=0 tests/tts_tests
+	pytest -x -v -n auto --durations=0 tests/tts_tests
 
 test_tts2:	## run tts tests.
-	coverage run -m pytest -x -v --durations=0 tests/tts_tests2
+	pytest -x -v -n auto --durations=0 tests/tts_tests2
 
 test_xtts:
-	coverage run -m pytest -x -v --durations=0 tests/xtts_tests
+	pytest -x -v -n auto --durations=0 tests/xtts_tests
 
 test_aux:	## run aux tests.
-	coverage run -m pytest -x -v --durations=0 tests/aux_tests
+	pytest -x -v -n auto --durations=0 tests/aux_tests
 	./run_bash_tests.sh
 
 test_zoo0:	## run zoo tests.
-	coverage run -m pytest -x -v --durations=0 tests/zoo_tests/test_models.py \
+	pytest -x -v -n auto --durations=0 tests/zoo_tests/test_models.py \
 	-k "test_models_offset_0_step_3 or test_voice_conversion"
 test_zoo1:	## run zoo tests.
-	coverage run -m pytest -x -v --durations=0 tests/zoo_tests/test_models.py -k test_models_offset_1_step_3
+	pytest -x -v -n auto --durations=0 tests/zoo_tests/test_models.py -k test_models_offset_1_step_3
 test_zoo2:	## run zoo tests.
-	coverage run -m pytest -x -v --durations=0 tests/zoo_tests/test_models.py -k test_models_offset_2_step_3
+	pytest -x -v -n auto --durations=0 tests/zoo_tests/test_models.py -k test_models_offset_2_step_3
 
 inference_tests: ## run inference tests.
-	coverage run -m pytest -x -v --durations=0 tests/inference_tests
+	pytest -x -v -n auto --durations=0 tests/inference_tests
 
 data_tests: ## run data tests.
-	coverage run -m pytest -x -v --durations=0 tests/data_tests
+	pytest -x -v -n auto --durations=0 tests/data_tests
 
 test_text: ## run text tests.
-	coverage run -m pytest -x -v --durations=0 tests/text_tests
+	pytest -x -v -n auto --durations=0 tests/text_tests
 
 test_failed:  ## only run tests failed the last time.
-	coverage run -m pytest --last-failed -v tests
+	pytest --last-failed -v tests
 
 style:	## update code style.
 	uv run --only-dev black ${target_dirs}

pyproject.toml

@@ -139,6 +139,8 @@ dev = [
     "coverage[toml]>=7",
     "pre-commit>=3",
     "pytest>=8",
+    "pytest-cov>=6.0.0",
+    "pytest-xdist[psutil]>=3.6.1",
     "ruff==0.7.0",
 ]
 # Dependencies for building the documentation
@@ -242,3 +244,6 @@ source = ["TTS"]
 [tool.cibuildwheel]
 build = "cp*"
 skip = "*-win32 *i686 *musllinux*"
+
+[tool.pytest.ini_options]
+addopts = "--cov=TTS"