#31752: Intermittent test failure on Windows with PostgreSQL
-------------------------------------+-------------------------------------
Reporter: Carlton | Owner: nobody
Gibson |
Type: Bug | Status: new
Component: Database | Version: master
layer (models, ORM) |
Severity: Normal | Keywords: Tests, Windows
Triage Stage: Accepted | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
[https://forum.djangoproject.com/t/gsoc-2020-parallel-test-runner/2528/17
Reported by Ahmad on the forum], there's an intermittent test failure with
Windows+Postgres.
{{{
(django) PS C:\Users\carlt\src\django\tests> python .\runtests.py
--settings=test_postgres m2m_through.tests.M2mThroughTests
Testing against Django installed in 'c:\users\carlt\src\django\django'
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
.....................F...................
======================================================================
FAIL: test_order_by_relational_field_through_model
(m2m_through.tests.M2mThroughTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File "C:\Users\carlt\src\django\tests\m2m_through\tests.py", line 247,
in test_order_by_relational_field_through_model
[self.jim, self.bob]
AssertionError: Sequences differ: <QuerySet [<Person: Person object (1)>,
<Person: Person object (2)>]> != [<Person: Person object (2)>, <Person:
Person object (1)>]
First differing element 0:
<Person: Person object (1)>
<Person: Person object (2)>
- <QuerySet [<Person: Person object (1)>, <Person: Person object (2)>]>
? ---------- ^ ^ -
+ [<Person: Person object (2)>, <Person: Person object (1)>]
? ^ ^
----------------------------------------------------------------------
Ran 41 tests in 0.264s
FAILED (failures=1)
Destroying test database for alias 'default'...
}}}
Looks like a non-deterministic ordering problem.
Reproduced at 615e32162ff646db3456b90fb4eaaecc33dd3e4e.
--
Ticket URL: <https://code.djangoproject.com/ticket/31752>
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