Blog test using internal python package

[marksweb]

Having recently switched to using uv, my version of python 3.12 doesn't come with the test module.

As stated at the top of the docs

Note
The test package is meant for internal use by Python only. It is documented for the benefit of the core developers of Python. Any use of this package outside of Python’s standard library is discouraged as code mentioned here can change or be removed without notice between releases of Python.

The blog tests import from test;

from test.support import captured_stderr

So running tox on my machine results in;

======================================================================
ERROR: blog.tests (unittest.loader._FailedTest.blog.tests)
----------------------------------------------------------------------
ImportError: Failed to import test module: blog.tests
Traceback (most recent call last):
  File "/Users/mark/.local/share/uv/python/cpython-3.12.7-macos-aarch64-none/lib/python3.12/unittest/loader.py", line 396, in _find_test_path
    module = self._get_module_from_name(name)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/mark/.local/share/uv/python/cpython-3.12.7-macos-aarch64-none/lib/python3.12/unittest/loader.py", line 339, in _get_module_from_name
    __import__(name)
  File "/Users/mark/dev/djangoproject.com/blog/tests.py", line 2, in <module>
    from test.support import captured_stderr
ModuleNotFoundError: No module named 'test'

In pytest there's a fixture for stderr, but not sure on the solution here.

[bmispelon]

Oh interesting. I agree that this should be fixed.

I wonder if we can replaced that by contextlib.redirect_stderr: https://docs.python.org/3/library/contextlib.html#contextlib.redirect_stderr

[bmispelon]

It looks like contextlib.redirect_stderr works as a replacement: #1769