chore: speed up test suite with pytest-xdist parallelization

pyproject.toml

@@ -172,14 +172,14 @@ matrix.deps.dependency-groups = [
 
 [tool.hatch.envs.test.scripts]
 run-coverage = [
-    "coverage run --source=src -m pytest --junitxml=junit.xml -o junit_family=legacy {args:}",
+    "coverage run --source=src -m pytest -n auto --junitxml=junit.xml -o junit_family=legacy {args:}",
     "coverage xml",
 ]
 run-coverage-html = [
-    "coverage run --source=src -m pytest {args:}",
+    "coverage run --source=src -m pytest -n auto {args:}",
     "coverage html",
 ]
-run = "pytest --ignore tests/benchmarks"
+run = "pytest -n auto --ignore tests/benchmarks {args:}"
 run-verbose = "run-coverage --verbose"
 run-mypy = "mypy src"
 run-hypothesis = [
@@ -413,6 +413,7 @@ addopts = [
     "--benchmark-disable", # benchmark routines run as tests without benchmarking instrumentation
     "--durations", "10",
     "-ra", "--strict-config", "--strict-markers",
+    "--dist", "loadgroup",
 ]
 filterwarnings = [
     "error",

tests/test_api/test_synchronous.py

@@ -93,7 +93,7 @@ def test_docstrings_match(callable_name: str) -> None:
             ),
         ),
     ],
-    ids=str,
+    ids=["store_path-create_array_group", "store_path-create", "array_params-create_array_dataset"],
 )
 def test_docstring_consistent_parameters(
     parameter_name: str, array_creation_routines: tuple[Callable[[Any], Any], ...]

tests/test_store/test_fsspec.py

@@ -44,6 +44,9 @@
     pytest.mark.filterwarnings(
         "ignore:Exception ignored in.*finalize object.*:pytest.PytestUnraisableExceptionWarning"
     ),
+    # All S3 tests share a module-scoped moto server on a fixed port,
+    # so they must run on a single xdist worker to avoid port conflicts.
+    pytest.mark.xdist_group(name="s3"),
 ]
 
 fsspec = pytest.importorskip("fsspec")