test to verify failed lock acquisition fix

Author: mattsb42-aws

test/functional/material_providers/store/test_meta.py

@@ -10,7 +10,7 @@
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
 # ANY KIND, either express or implied. See the License for the specific
 # language governing permissions and limitations under the License.
-"""Integration tests for ``dynamodb_encryption_sdk.material_providers.store.meta``."""
+"""Functional tests for ``dynamodb_encryption_sdk.material_providers.store.meta``."""
 import base64
 import os
 

test/functional/material_providers/test_most_recent.py

@@ -0,0 +1,37 @@
+# Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+# http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+# ANY KIND, either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+"""Functional tests for ``dynamodb_encryption_sdk.material_providers.most_recent``."""
+from mock import MagicMock, sentinel
+import pytest
+
+from dynamodb_encryption_sdk.material_providers.most_recent import MostRecentProvider
+from dynamodb_encryption_sdk.material_providers.store import ProviderStore
+
+pytestmark = [pytest.mark.functional, pytest.mark.local]
+
+
+def test_failed_lock_acquisition():
+    store = MagicMock(__class__=ProviderStore)
+    provider = MostRecentProvider(
+        provider_store=store,
+        material_name='my material',
+        version_ttl=10.0
+    )
+    provider._version = 9
+    provider._cache.put(provider._version, sentinel.nine)
+
+    with provider._lock:
+        test = provider._get_most_recent_version(allow_local=True)
+
+    assert test is sentinel.nine
+    assert not store.mock_calls