id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
33633	Some test_utils tests fail on databases that don't support transactions.	Xiang Zhang	Xiang Zhang	"
{{{
FAIL: test_reset_sequences (test_utils.test_testcase.TestTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File ""/Users/zhangyangyu/repos/django-tidb/django_tests_dir/django/tests/test_utils/test_testcase.py"", line 47, in test_reset_sequences
    old_reset_sequences = self.reset_sequences
  File ""/opt/homebrew/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/contextlib.py"", line 126, in __exit__
    next(self.gen)
  File ""/Users/zhangyangyu/repos/django-tidb/django_tests_dir/django/django/test/testcases.py"", line 807, in _assert_raises_or_warns_cm
    yield cm
AssertionError: TypeError not raised
}}}

{{{
FAIL: test_execute_tree (test_utils.tests.CaptureOnCommitCallbacksTests)
A visualisation of the callback tree tested. Each node is expected to
----------------------------------------------------------------------
Traceback (most recent call last):
  File ""/Users/zhangyangyu/repos/django-tidb/django_tests_dir/django/tests/test_utils/tests.py"", line 1657, in test_execute_tree
    self.assertEqual(callbacks, [branch_1, branch_2, leaf_3, leaf_1, leaf_2])
AssertionError: Lists differ: [] != [<function CaptureOnCommitCallbacksTests.t[412 chars]ee0>]

Second list contains 5 additional elements.
First extra element 0:
<function CaptureOnCommitCallbacksTests.test_execute_tree.<locals>.branch_1 at 0x107c52430>

- []
+ [<function CaptureOnCommitCallbacksTests.test_execute_tree.<locals>.branch_1 at 0x107c52430>,
+  <function CaptureOnCommitCallbacksTests.test_execute_tree.<locals>.branch_2 at 0x107c52040>,
+  <function CaptureOnCommitCallbacksTests.test_execute_tree.<locals>.leaf_3 at 0x107c52dc0>,
+  <function CaptureOnCommitCallbacksTests.test_execute_tree.<locals>.leaf_1 at 0x107e17310>,
+  <function CaptureOnCommitCallbacksTests.test_execute_tree.<locals>.leaf_2 at 0x107c52ee0>]
}}}

{{{
FAIL: test_execute_recursive (test_utils.tests.CaptureOnCommitCallbacksTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File ""/Users/zhangyangyu/repos/django-tidb/django_tests_dir/django/tests/test_utils/tests.py"", line 1604, in test_execute_recursive
    self.assertEqual(len(callbacks), 2)
AssertionError: 0 != 2
}}}


`test_reset_sequences`/`test_execute_tree`/`test_execute_recursive` fail with above error if testing against backends not supporting transactions, like MySQL MyIASM engine."	Cleanup/optimization	closed	Core (Other)	4.0	Normal	fixed			Ready for checkin	1	0	0	0	0	0