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| 1 | +# Copyright 2025 Google LLC All rights reserved. |
| 2 | +# |
| 3 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +# you may not use this file except in compliance with the License. |
| 5 | +# You may obtain a copy of the License at |
| 6 | +# |
| 7 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +# |
| 9 | +# Unless required by applicable law or agreed to in writing, software |
| 10 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +# See the License for the specific language governing permissions and |
| 13 | +# limitations under the License. |
| 14 | + |
| 15 | +from google.cloud.spanner_dbapi import Connection |
| 16 | +from google.cloud.spanner_v1 import ( |
| 17 | + BeginTransactionRequest, TransactionOptions, |
| 18 | +) |
| 19 | +from tests.mockserver_tests.mock_server_test_base import ( |
| 20 | + MockServerTestBase, |
| 21 | + add_update_count, |
| 22 | +) |
| 23 | + |
| 24 | + |
| 25 | +class TestDbapiIsolationLevel(MockServerTestBase): |
| 26 | + @classmethod |
| 27 | + def setup_class(cls): |
| 28 | + super().setup_class() |
| 29 | + add_update_count("insert into singers (id, name) values (1, 'Some Singer')", 1) |
| 30 | + |
| 31 | + def test_isolation_level_default(self): |
| 32 | + connection = Connection(self.instance, self.database) |
| 33 | + with connection.cursor() as cursor: |
| 34 | + cursor.execute("insert into singers (id, name) values (1, 'Some Singer')") |
| 35 | + self.assertEqual(1, cursor.rowcount) |
| 36 | + connection.commit() |
| 37 | + begin_requests = list( |
| 38 | + filter( |
| 39 | + lambda msg: isinstance(msg, BeginTransactionRequest), |
| 40 | + self.spanner_service.requests, |
| 41 | + ) |
| 42 | + ) |
| 43 | + self.assertEqual(1, len(begin_requests)) |
| 44 | + self.assertEqual( |
| 45 | + begin_requests[0].options.isolation_level, |
| 46 | + TransactionOptions.IsolationLevel.ISOLATION_LEVEL_UNSPECIFIED) |
| 47 | + |
| 48 | + def test_custom_isolation_level(self): |
| 49 | + connection = Connection(self.instance, self.database) |
| 50 | + for level in [ |
| 51 | + TransactionOptions.IsolationLevel.ISOLATION_LEVEL_UNSPECIFIED, |
| 52 | + TransactionOptions.IsolationLevel.REPEATABLE_READ, |
| 53 | + TransactionOptions.IsolationLevel.SERIALIZABLE, |
| 54 | + ]: |
| 55 | + connection.isolation_level = level |
| 56 | + with connection.cursor() as cursor: |
| 57 | + cursor.execute("insert into singers (id, name) values (1, 'Some Singer')") |
| 58 | + self.assertEqual(1, cursor.rowcount) |
| 59 | + connection.commit() |
| 60 | + begin_requests = list( |
| 61 | + filter( |
| 62 | + lambda msg: isinstance(msg, BeginTransactionRequest), |
| 63 | + self.spanner_service.requests, |
| 64 | + ) |
| 65 | + ) |
| 66 | + self.assertEqual(1, len(begin_requests)) |
| 67 | + self.assertEqual(begin_requests[0].options.isolation_level, level) |
| 68 | + MockServerTestBase.spanner_service.clear_requests() |
| 69 | + |
| 70 | + def test_isolation_level_in_connection_kwargs(self): |
| 71 | + for level in [ |
| 72 | + TransactionOptions.IsolationLevel.ISOLATION_LEVEL_UNSPECIFIED, |
| 73 | + TransactionOptions.IsolationLevel.REPEATABLE_READ, |
| 74 | + TransactionOptions.IsolationLevel.SERIALIZABLE, |
| 75 | + ]: |
| 76 | + connection = Connection( |
| 77 | + self.instance, |
| 78 | + self.database, |
| 79 | + kwargs={'isolation_level': level},) |
| 80 | + with connection.cursor() as cursor: |
| 81 | + cursor.execute("insert into singers (id, name) values (1, 'Some Singer')") |
| 82 | + self.assertEqual(1, cursor.rowcount) |
| 83 | + connection.commit() |
| 84 | + begin_requests = list( |
| 85 | + filter( |
| 86 | + lambda msg: isinstance(msg, BeginTransactionRequest), |
| 87 | + self.spanner_service.requests, |
| 88 | + ) |
| 89 | + ) |
| 90 | + self.assertEqual(1, len(begin_requests)) |
| 91 | + self.assertEqual(begin_requests[0].options.isolation_level, level) |
| 92 | + MockServerTestBase.spanner_service.clear_requests() |
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