diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/storage/test_id_generators.py | 162 |
1 files changed, 152 insertions, 10 deletions
diff --git a/tests/storage/test_id_generators.py b/tests/storage/test_id_generators.py index 2d8d1f860f..d6a2b8d274 100644 --- a/tests/storage/test_id_generators.py +++ b/tests/storage/test_id_generators.py @@ -16,15 +16,157 @@ from typing import List, Optional from twisted.test.proto_helpers import MemoryReactor from synapse.server import HomeServer -from synapse.storage.database import DatabasePool, LoggingTransaction +from synapse.storage.database import ( + DatabasePool, + LoggingDatabaseConnection, + LoggingTransaction, +) from synapse.storage.engines import IncorrectDatabaseSetup -from synapse.storage.util.id_generators import MultiWriterIdGenerator +from synapse.storage.types import Cursor +from synapse.storage.util.id_generators import MultiWriterIdGenerator, StreamIdGenerator from synapse.util import Clock from tests.unittest import HomeserverTestCase from tests.utils import USE_POSTGRES_FOR_TESTS +class StreamIdGeneratorTestCase(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 + + self.get_success(self.db_pool.runInteraction("_setup_db", self._setup_db)) + + def _setup_db(self, txn: LoggingTransaction) -> None: + txn.execute( + """ + CREATE TABLE foobar ( + stream_id BIGINT NOT NULL, + data TEXT + ); + """ + ) + txn.execute("INSERT INTO foobar VALUES (123, 'hello world');") + + def _create_id_generator(self) -> StreamIdGenerator: + def _create(conn: LoggingDatabaseConnection) -> StreamIdGenerator: + return StreamIdGenerator( + db_conn=conn, + table="foobar", + column="stream_id", + ) + + return self.get_success_or_raise(self.db_pool.runWithConnection(_create)) + + def test_initial_value(self) -> None: + """Check that we read the current token from the DB.""" + id_gen = self._create_id_generator() + self.assertEqual(id_gen.get_current_token(), 123) + + def test_single_gen_next(self) -> None: + """Check that we correctly increment the current token from the DB.""" + id_gen = self._create_id_generator() + + async def test_gen_next() -> None: + async with id_gen.get_next() as next_id: + # We haven't persisted `next_id` yet; current token is still 123 + self.assertEqual(id_gen.get_current_token(), 123) + # But we did learn what the next value is + self.assertEqual(next_id, 124) + + # Once the context manager closes we assume that the `next_id` has been + # written to the DB. + self.assertEqual(id_gen.get_current_token(), 124) + + self.get_success(test_gen_next()) + + def test_multiple_gen_nexts(self) -> None: + """Check that we handle overlapping calls to gen_next sensibly.""" + id_gen = self._create_id_generator() + + async def test_gen_next() -> None: + ctx1 = id_gen.get_next() + ctx2 = id_gen.get_next() + ctx3 = id_gen.get_next() + + # Request three new stream IDs. + self.assertEqual(await ctx1.__aenter__(), 124) + self.assertEqual(await ctx2.__aenter__(), 125) + self.assertEqual(await ctx3.__aenter__(), 126) + + # None are persisted: current token unchanged. + self.assertEqual(id_gen.get_current_token(), 123) + + # Persist each in turn. + await ctx1.__aexit__(None, None, None) + self.assertEqual(id_gen.get_current_token(), 124) + await ctx2.__aexit__(None, None, None) + self.assertEqual(id_gen.get_current_token(), 125) + await ctx3.__aexit__(None, None, None) + self.assertEqual(id_gen.get_current_token(), 126) + + self.get_success(test_gen_next()) + + def test_multiple_gen_nexts_closed_in_different_order(self) -> None: + """Check that we handle overlapping calls to gen_next, even when their IDs + created and persisted in different orders.""" + id_gen = self._create_id_generator() + + async def test_gen_next() -> None: + ctx1 = id_gen.get_next() + ctx2 = id_gen.get_next() + ctx3 = id_gen.get_next() + + # Request three new stream IDs. + self.assertEqual(await ctx1.__aenter__(), 124) + self.assertEqual(await ctx2.__aenter__(), 125) + self.assertEqual(await ctx3.__aenter__(), 126) + + # None are persisted: current token unchanged. + self.assertEqual(id_gen.get_current_token(), 123) + + # Persist them in a different order, starting with 126 from ctx3. + await ctx3.__aexit__(None, None, None) + # We haven't persisted 124 from ctx1 yet---current token is still 123. + self.assertEqual(id_gen.get_current_token(), 123) + + # Now persist 124 from ctx1. + await ctx1.__aexit__(None, None, None) + # Current token is then 124, waiting for 125 to be persisted. + self.assertEqual(id_gen.get_current_token(), 124) + + # Finally persist 125 from ctx2. + await ctx2.__aexit__(None, None, None) + # Current token is then 126 (skipping over 125). + self.assertEqual(id_gen.get_current_token(), 126) + + self.get_success(test_gen_next()) + + def test_gen_next_while_still_waiting_for_persistence(self) -> None: + """Check that we handle overlapping calls to gen_next.""" + id_gen = self._create_id_generator() + + async def test_gen_next() -> None: + ctx1 = id_gen.get_next() + ctx2 = id_gen.get_next() + ctx3 = id_gen.get_next() + + # Request two new stream IDs. + self.assertEqual(await ctx1.__aenter__(), 124) + self.assertEqual(await ctx2.__aenter__(), 125) + + # Persist ctx2 first. + await ctx2.__aexit__(None, None, None) + # Still waiting on ctx1's ID to be persisted. + self.assertEqual(id_gen.get_current_token(), 123) + + # Now request a third stream ID. It should be 126 (the smallest ID that + # we've not yet handed out.) + self.assertEqual(await ctx3.__aenter__(), 126) + + self.get_success(test_gen_next()) + + class MultiWriterIdGeneratorTestCase(HomeserverTestCase): if not USE_POSTGRES_FOR_TESTS: skip = "Requires Postgres" @@ -48,9 +190,9 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase): ) def _create_id_generator( - self, instance_name="master", writers: Optional[List[str]] = None + self, instance_name: str = "master", writers: Optional[List[str]] = None ) -> MultiWriterIdGenerator: - def _create(conn): + def _create(conn: LoggingDatabaseConnection) -> MultiWriterIdGenerator: return MultiWriterIdGenerator( conn, self.db_pool, @@ -446,7 +588,7 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase): self._insert_row_with_id("master", 3) # Now we add a row *without* updating the stream ID - def _insert(txn): + def _insert(txn: Cursor) -> None: txn.execute("INSERT INTO foobar VALUES (26, 'master')") self.get_success(self.db_pool.runInteraction("_insert", _insert)) @@ -481,9 +623,9 @@ class BackwardsMultiWriterIdGeneratorTestCase(HomeserverTestCase): ) def _create_id_generator( - self, instance_name="master", writers: Optional[List[str]] = None + self, instance_name: str = "master", writers: Optional[List[str]] = None ) -> MultiWriterIdGenerator: - def _create(conn): + def _create(conn: LoggingDatabaseConnection) -> MultiWriterIdGenerator: return MultiWriterIdGenerator( conn, self.db_pool, @@ -617,9 +759,9 @@ class MultiTableMultiWriterIdGeneratorTestCase(HomeserverTestCase): ) def _create_id_generator( - self, instance_name="master", writers: Optional[List[str]] = None + self, instance_name: str = "master", writers: Optional[List[str]] = None ) -> MultiWriterIdGenerator: - def _create(conn): + def _create(conn: LoggingDatabaseConnection) -> MultiWriterIdGenerator: return MultiWriterIdGenerator( conn, self.db_pool, @@ -641,7 +783,7 @@ class MultiTableMultiWriterIdGeneratorTestCase(HomeserverTestCase): instance_name: str, number: int, update_stream_table: bool = True, - ): + ) -> None: """Insert N rows as the given instance, inserting with stream IDs pulled from the postgres sequence. """ |