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Diffstat (limited to 'docs/topics/testing/tools.txt')
| -rw-r--r-- | docs/topics/testing/tools.txt | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/docs/topics/testing/tools.txt b/docs/topics/testing/tools.txt index b14a173987..eac4fa3ef7 100644 --- a/docs/topics/testing/tools.txt +++ b/docs/topics/testing/tools.txt @@ -873,11 +873,13 @@ It also provides an additional method: (for instance, MySQL with the MyISAM engine), ``setUpTestData()`` will be called before each test, negating the speed benefits. - Be careful not to modify any objects created in ``setUpTestData()`` in - your test methods. Modifications to in-memory objects from setup work done - at the class level will persist between test methods. If you do need to - modify them, you could reload them in the ``setUp()`` method with - :meth:`~django.db.models.Model.refresh_from_db`, for example. + .. versionchanged:: 3.2 + + Objects assigned to class attributes in ``setUpTestData()`` must + support creating deep copies with :py:func:`copy.deepcopy` in order to + isolate them from alterations performed by each test methods. In + previous versions of Django these objects were reused and changes made + to them were persisted between test methods. .. _live-test-server: |