diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/storage/test_database.py | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/tests/storage/test_database.py b/tests/storage/test_database.py index ae13bed086..a40fc20ef9 100644 --- a/tests/storage/test_database.py +++ b/tests/storage/test_database.py @@ -15,6 +15,8 @@ from typing import Callable, Tuple from unittest.mock import Mock, call +from twisted.internet import defer +from twisted.internet.defer import CancelledError, Deferred from twisted.test.proto_helpers import MemoryReactor from synapse.server import HomeServer @@ -124,3 +126,59 @@ class CallbacksTestCase(unittest.HomeserverTestCase): ) self.assertEqual(after_callback.call_count, 2) # no additional calls exception_callback.assert_not_called() + + +class CancellationTestCase(unittest.HomeserverTestCase): + def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None: + self.store = hs.get_datastores().main + self.db_pool: DatabasePool = self.store.db_pool + + def test_after_callback(self) -> None: + """Test that the after callback is called when a transaction succeeds.""" + d: "Deferred[None]" + after_callback = Mock() + exception_callback = Mock() + + def _test_txn(txn: LoggingTransaction) -> None: + txn.call_after(after_callback, 123, 456, extra=789) + txn.call_on_exception(exception_callback, 987, 654, extra=321) + d.cancel() + + d = defer.ensureDeferred( + self.db_pool.runInteraction("test_transaction", _test_txn) + ) + self.get_failure(d, CancelledError) + + after_callback.assert_called_once_with(123, 456, extra=789) + exception_callback.assert_not_called() + + def test_exception_callback(self) -> None: + """Test that the exception callback is called when a transaction fails.""" + d: "Deferred[None]" + after_callback = Mock() + exception_callback = Mock() + + def _test_txn(txn: LoggingTransaction) -> None: + txn.call_after(after_callback, 123, 456, extra=789) + txn.call_on_exception(exception_callback, 987, 654, extra=321) + d.cancel() + # Simulate a retryable failure on every attempt. + raise self.db_pool.engine.module.OperationalError() + + d = defer.ensureDeferred( + self.db_pool.runInteraction("test_transaction", _test_txn) + ) + self.get_failure(d, CancelledError) + + after_callback.assert_not_called() + exception_callback.assert_has_calls( + [ + call(987, 654, extra=321), + call(987, 654, extra=321), + call(987, 654, extra=321), + call(987, 654, extra=321), + call(987, 654, extra=321), + call(987, 654, extra=321), + ] + ) + self.assertEqual(exception_callback.call_count, 6) # no additional calls |