Re: [Django] #33633: test_reset_sequences/test_execute_tree/test_execute_recursive fail for backends not supporting transactions (was: test_reset_sequences fails for backends not supporting transactions)

[Django]

#33633: test_reset_sequences/test_execute_tree/test_execute_recursive fail for
backends not supporting transactions
-----------------------------------+--------------------------------------
Reporter: Xiang Zhang | Owner: nobody
Type: Uncategorized | Status: new
Component: Testing framework | Version: 4.0
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-----------------------------------+--------------------------------------
Description changed by Xiang Zhang:

Old description:

> {{{
> 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
> }}}
>
> `test_reset_sequences` fails with above error if testing against backends
> not supporting transactions, like MySQL MyIASM engine.

New description:

{{{
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.

--

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Ticket URL: <https://code.djangoproject.com/ticket/33633#comment:1>
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