test: parallel test support and enable in CI (#571)

Author: reaperhulk

Diff for: dev_requirements/test-requirements.txt

@@ -4,6 +4,6 @@ moto==3.0.2
 pytest==7.2.1
 pytest-cov==3.0.0
 pytest-mock==3.10.0
-pytest-xdist==2.5.0
+pytest-xdist==3.2.0
 boto3==1.20.51
 botocore==1.23.51

Diff for: test/unit/material_providers/test_aws_kms.py

@@ -220,36 +220,32 @@ def test_loaded_key_infos():
     assert cmp._regional_clients == {}
 
 
-@pytest.mark.parametrize(
-    "kwargs",
-    [
-        pytest.param(val, id=str(val))
-        for val in all_possible_combinations_kwargs(
-            {},
-            dict(botocore_session=botocore.session.Session()),
-            dict(grant_tokens=("sdvoaweih", "auwshefiouawh")),
-            dict(material_description={"asoiufeoia": "soajfijewi"}),
-            dict(
-                regional_clients={
-                    "my-region-1": boto3.session.Session().client(
-                        "kms", region_name="not-a-real-region", endpoint_url="https://not-a-real-url"
-                    )
-                }
-            ),
-        )
-    ],
-)
-def test_kms_cmp_values_set(kwargs):
-    cmp = AwsKmsCryptographicMaterialsProvider(key_id="example_key_id", **kwargs)
+def test_kms_cmp_values_set():
+    # These aren't parametrized to avoid issues with pytest-xdist test mismatches
+    # due to different session objects per process
+    for kwargs in all_possible_combinations_kwargs(
+        {},
+        dict(botocore_session=botocore.session.Session()),
+        dict(grant_tokens=("sdvoaweih", "auwshefiouawh")),
+        dict(material_description={"asoiufeoia": "soajfijewi"}),
+        dict(
+            regional_clients={
+                "my-region-1": boto3.session.Session().client(
+                    "kms", region_name="not-a-real-region", endpoint_url="https://not-a-real-url"
+                )
+            }
+        ),
+    ):
+        cmp = AwsKmsCryptographicMaterialsProvider(key_id="example_key_id", **kwargs)
 
-    assert cmp._key_id == "example_key_id"
+        assert cmp._key_id == "example_key_id"
 
-    if "botocore_session" in kwargs:
-        assert cmp._botocore_session == kwargs["botocore_session"]
+        if "botocore_session" in kwargs:
+            assert cmp._botocore_session == kwargs["botocore_session"]
 
-    assert cmp._grant_tokens == kwargs.get("grant_tokens", ())
-    assert cmp._material_description == kwargs.get("material_description", {})
-    assert cmp._regional_clients == kwargs.get("regional_clients", {})
+        assert cmp._grant_tokens == kwargs.get("grant_tokens", ())
+        assert cmp._material_description == kwargs.get("material_description", {})
+        assert cmp._regional_clients == kwargs.get("regional_clients", {})
 
 
 def test_add_regional_client_known_region(default_kms_cmp, patch_boto3_session):

Diff for: test/upstream-requirements-py311.txt

@@ -23,7 +23,7 @@ pytest==7.2.1
 pytest-cov==3.0.0
 pytest-forked==1.6.0
 pytest-mock==3.10.0
-pytest-xdist==2.5.0
+pytest-xdist==3.2.0
 python-dateutil==2.8.2
 pytz==2022.7.1
 requests==2.28.2

Diff for: test/upstream-requirements-py37.txt

@@ -25,7 +25,7 @@ pytest==7.2.1
 pytest-cov==3.0.0
 pytest-forked==1.6.0
 pytest-mock==3.10.0
-pytest-xdist==2.5.0
+pytest-xdist==3.2.0
 python-dateutil==2.8.2
 pytz==2022.7.1
 requests==2.28.2

Diff for: tox.ini

@@ -40,7 +40,7 @@ envlist =
 # coverage :: Runs code coverage, failing the build if coverage is below the configured threshold
 
 [testenv:base-command]
-commands = pytest --basetemp={envtmpdir} -l {posargs}
+commands = pytest -n auto --basetemp={envtmpdir} -l {posargs}
 
 [testenv]
 passenv =
@@ -226,7 +226,7 @@ commands =
 
 [testenv:flake8-examples]
 basepython = {[testenv:flake8]basepython}
-deps = {[testenv:flake8]deps} 
+deps = {[testenv:flake8]deps}
 commands =
     flake8 \
         # Ignore C901 complexity requirements (examples optimize for straightforward readability)
@@ -345,10 +345,10 @@ whitelist_externals = {[testenv:resetdocs]whitelist_externals}
 deps =
     -rdev_requirements/doc-requirements.txt
     -rdev_requirements/linter-requirements.txt
-commands = 
+commands =
     {[testenv:resetdocs]commands}
     doc8 doc/index.rst doc/lib/ README.rst CHANGELOG.rst
-    
+
 
 [testenv:readme]
 basepython = python3