Add tests for cassandra/retry_policy.py

Story: 2007280
Task: 38724

Depends-On: https://review.opendev.org/#/c/679076/

Change-Id: I440e36ad37dc94ffcd665f3925b7f25b5964cbf8

monasca_persister/tests/test_retry_policy.py

@@ -0,0 +1,101 @@
+# (C) Copyright 2019 Fujitsu Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License 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.
+
+from mock import Mock
+
+from cassandra.policies import RetryPolicy
+from oslotest import base
+
+from monasca_persister.repositories.cassandra import retry_policy
+
+
+class TestMonascaRetryPolicy(base.BaseTestCase):
+    def setUp(self):
+        super(TestMonascaRetryPolicy, self).setUp()
+        self.monasca_retry_policy = retry_policy.MonascaRetryPolicy(0, 0, 0)
+
+    def tearDown(self):
+        super(TestMonascaRetryPolicy, self).tearDown()
+
+    def test_on_read_timeout_when_retry_num_gt_read_attempts(self):
+        self.monasca_retry_policy.read_attempts = 0
+        retry_num = 1
+        rethrow, none = self.monasca_retry_policy.on_read_timeout(Mock(), Mock(), Mock(), 0, 0,
+                                                                  retry_num)
+        self.assertEqual(rethrow, RetryPolicy.RETHROW)
+        self.assertEqual(none, None)
+
+    def test_on_read_timeout_when_responses_received_gt_required_and_data_retrieved_is_none(self):
+        consistency = 'some_value'
+        received_responses = 1
+        required_responses = 0
+        data_retrieved = None
+        retry_num = 0
+        self.monasca_retry_policy.read_attempts = 1
+        returned_retry, returned_consistency = self.monasca_retry_policy. \
+            on_read_timeout(Mock(), consistency, required_responses,
+                            received_responses, data_retrieved, retry_num)
+        self.assertEqual(returned_retry, RetryPolicy.RETRY)
+        self.assertEqual(consistency, returned_consistency)
+
+    def test_on_read_timeout_if_previous_conditions_not_fulfilled(self):
+        consistency = 'some_value'
+        received_responses = 1
+        required_reponses = 0
+        data_retrieved = ['some']
+        retry_num = 0
+        self.monasca_retry_policy.read_attempts = 1
+        returned_rethrow, returned_none = self.monasca_retry_policy. \
+            on_read_timeout(Mock(), consistency, required_reponses,
+                            received_responses, data_retrieved, retry_num)
+        self.assertEqual(returned_rethrow, RetryPolicy.RETHROW)
+        self.assertEqual(returned_none, None)
+
+    def test_on_write_timeout_if_retry_num_gt_or_eq_write_attempts(self):
+        retry_num = 1
+        self.monasca_retry_policy.write_attempts = 0
+        returned_rethrow, returned_none = self.monasca_retry_policy. \
+            on_write_timeout(Mock(), Mock(), Mock(), 0, 0, retry_num)
+        self.assertEqual(returned_rethrow, RetryPolicy.RETHROW)
+        self.assertEqual(returned_none, None)
+
+    def test_on_write_timeout_if_retry_num_lt_write_attempts(self):
+        retry_num = 0
+        consistency = 0
+        self.monasca_retry_policy.write_attempts = 1
+        returned_retry, returned_consistency = self.monasca_retry_policy. \
+            on_write_timeout(Mock(), consistency, Mock(), 0, 0, retry_num)
+        self.assertEqual(returned_retry, RetryPolicy.RETRY)
+        self.assertEqual(returned_consistency, consistency)
+
+    def test_on_unavailable_if_retry_num_lt_unavailable_attempts(self):
+        consistency = 0
+        retry_num = 0
+        self.monasca_retry_policy.unavailable_attempts = 1
+
+        returned_retry_next_host, returned_consistency = \
+            self.monasca_retry_policy.on_unavailable(Mock(), consistency, 0, 0, retry_num)
+        self.assertEqual(returned_consistency, consistency)
+        self.assertEqual(returned_retry_next_host, RetryPolicy.RETRY_NEXT_HOST)
+
+    def test_on_unavailable_if_retry_num_gt_or_eq_unavailable_attempts(self):
+        consistency = 0
+        retry_num = 1
+        self.monasca_retry_policy.unavailable_attempts = 1
+
+        returned_rethrow, returned_none = \
+            self.monasca_retry_policy.on_unavailable(Mock(), consistency, 0, 0, retry_num)
+        self.assertEqual(returned_none, None)
+        self.assertEqual(returned_rethrow, RetryPolicy.RETHROW)