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lib64
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python3.8
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sqlalchemy
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testing
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fixtures
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base.py
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# testing/fixtures/base.py # Copyright (C) 2005-2024 the SQLAlchemy authors and contributors # <see AUTHORS file> # # This module is part of SQLAlchemy and is released under # the MIT License: https://www.opensource.org/licenses/mit-license.php # mypy: ignore-errors from __future__ import annotations import sqlalchemy as sa from .. import assertions from .. import config from ..assertions import eq_ from ..util import drop_all_tables_from_metadata from ... import Column from ... import func from ... import Integer from ... import select from ... import Table from ...orm import DeclarativeBase from ...orm import MappedAsDataclass from ...orm import registry @config.mark_base_test_class() class TestBase: # A sequence of requirement names matching testing.requires decorators __requires__ = () # A sequence of dialect names to exclude from the test class. __unsupported_on__ = () # If present, test class is only runnable for the *single* specified # dialect. If you need multiple, use __unsupported_on__ and invert. __only_on__ = None # A sequence of no-arg callables. If any are True, the entire testcase is # skipped. __skip_if__ = None # if True, the testing reaper will not attempt to touch connection # state after a test is completed and before the outer teardown # starts __leave_connections_for_teardown__ = False def assert_(self, val, msg=None): assert val, msg @config.fixture() def nocache(self): _cache = config.db._compiled_cache config.db._compiled_cache = None yield config.db._compiled_cache = _cache @config.fixture() def connection_no_trans(self): eng = getattr(self, "bind", None) or config.db with eng.connect() as conn: yield conn @config.fixture() def connection(self): global _connection_fixture_connection eng = getattr(self, "bind", None) or config.db conn = eng.connect() trans = conn.begin() _connection_fixture_connection = conn yield conn _connection_fixture_connection = None if trans.is_active: trans.rollback() # trans would not be active here if the test is using # the legacy @provide_metadata decorator still, as it will # run a close all connections. conn.close() @config.fixture() def close_result_when_finished(self): to_close = [] to_consume = [] def go(result, consume=False): to_close.append(result) if consume: to_consume.append(result) yield go for r in to_consume: try: r.all() except: pass for r in to_close: try: r.close() except: pass @config.fixture() def registry(self, metadata): reg = registry( metadata=metadata, type_annotation_map={ str: sa.String().with_variant( sa.String(50), "mysql", "mariadb", "oracle" ) }, ) yield reg reg.dispose() @config.fixture def decl_base(self, metadata): _md = metadata class Base(DeclarativeBase): metadata = _md type_annotation_map = { str: sa.String().with_variant( sa.String(50), "mysql", "mariadb", "oracle" ) } yield Base Base.registry.dispose() @config.fixture def dc_decl_base(self, metadata): _md = metadata class Base(MappedAsDataclass, DeclarativeBase): metadata = _md type_annotation_map = { str: sa.String().with_variant( sa.String(50), "mysql", "mariadb" ) } yield Base Base.registry.dispose() @config.fixture() def future_connection(self, future_engine, connection): # integrate the future_engine and connection fixtures so # that users of the "connection" fixture will get at the # "future" connection yield connection @config.fixture() def future_engine(self): yield @config.fixture() def testing_engine(self): from .. import engines def gen_testing_engine( url=None, options=None, future=None, asyncio=False, transfer_staticpool=False, share_pool=False, ): if options is None: options = {} options["scope"] = "fixture" return engines.testing_engine( url=url, options=options, asyncio=asyncio, transfer_staticpool=transfer_staticpool, share_pool=share_pool, ) yield gen_testing_engine engines.testing_reaper._drop_testing_engines("fixture") @config.fixture() def async_testing_engine(self, testing_engine): def go(**kw): kw["asyncio"] = True return testing_engine(**kw) return go @config.fixture() def metadata(self, request): """Provide bound MetaData for a single test, dropping afterwards.""" from ...sql import schema metadata = schema.MetaData() request.instance.metadata = metadata yield metadata del request.instance.metadata if ( _connection_fixture_connection and _connection_fixture_connection.in_transaction() ): trans = _connection_fixture_connection.get_transaction() trans.rollback() with _connection_fixture_connection.begin(): drop_all_tables_from_metadata( metadata, _connection_fixture_connection ) else: drop_all_tables_from_metadata(metadata, config.db) @config.fixture( params=[ (rollback, second_operation, begin_nested) for rollback in (True, False) for second_operation in ("none", "execute", "begin") for begin_nested in ( True, False, ) ] ) def trans_ctx_manager_fixture(self, request, metadata): rollback, second_operation, begin_nested = request.param t = Table("test", metadata, Column("data", Integer)) eng = getattr(self, "bind", None) or config.db t.create(eng) def run_test(subject, trans_on_subject, execute_on_subject): with subject.begin() as trans: if begin_nested: if not config.requirements.savepoints.enabled: config.skip_test("savepoints not enabled") if execute_on_subject: nested_trans = subject.begin_nested() else: nested_trans = trans.begin_nested() with nested_trans: if execute_on_subject: subject.execute(t.insert(), {"data": 10}) else: trans.execute(t.insert(), {"data": 10}) # for nested trans, we always commit/rollback on the # "nested trans" object itself. # only Session(future=False) will affect savepoint # transaction for session.commit/rollback if rollback: nested_trans.rollback() else: nested_trans.commit() if second_operation != "none": with assertions.expect_raises_message( sa.exc.InvalidRequestError, "Can't operate on closed transaction " "inside context " "manager. Please complete the context " "manager " "before emitting further commands.", ): if second_operation == "execute": if execute_on_subject: subject.execute( t.insert(), {"data": 12} ) else: trans.execute(t.insert(), {"data": 12}) elif second_operation == "begin": if execute_on_subject: subject.begin_nested() else: trans.begin_nested() # outside the nested trans block, but still inside the # transaction block, we can run SQL, and it will be # committed if execute_on_subject: subject.execute(t.insert(), {"data": 14}) else: trans.execute(t.insert(), {"data": 14}) else: if execute_on_subject: subject.execute(t.insert(), {"data": 10}) else: trans.execute(t.insert(), {"data": 10}) if trans_on_subject: if rollback: subject.rollback() else: subject.commit() else: if rollback: trans.rollback() else: trans.commit() if second_operation != "none": with assertions.expect_raises_message( sa.exc.InvalidRequestError, "Can't operate on closed transaction inside " "context " "manager. Please complete the context manager " "before emitting further commands.", ): if second_operation == "execute": if execute_on_subject: subject.execute(t.insert(), {"data": 12}) else: trans.execute(t.insert(), {"data": 12}) elif second_operation == "begin": if hasattr(trans, "begin"): trans.begin() else: subject.begin() elif second_operation == "begin_nested": if execute_on_subject: subject.begin_nested() else: trans.begin_nested() expected_committed = 0 if begin_nested: # begin_nested variant, we inserted a row after the nested # block expected_committed += 1 if not rollback: # not rollback variant, our row inserted in the target # block itself would be committed expected_committed += 1 if execute_on_subject: eq_( subject.scalar(select(func.count()).select_from(t)), expected_committed, ) else: with subject.connect() as conn: eq_( conn.scalar(select(func.count()).select_from(t)), expected_committed, ) return run_test _connection_fixture_connection = None class FutureEngineMixin: """alembic's suite still using this"""