0.4.27: pytest is failing

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I'm packaging your module as an rpm package so I'm using the typical PEP517 based build, install and test cycle used on building packages from non-root account.

python3 -sBm build -w --no-isolation
because I'm calling build with --no-isolation I'm using during all processes only locally installed modules
install .whl file in </install/prefix>
run pytest with $PYTHONPATH pointing to sitearch and sitelib inside </install/prefix>
build is performed in env which is cut off from access to the public network (pytest is executed with -m "not network")

Here is pytest output:

+ PYTHONPATH=/home/tkloczko/rpmbuild/BUILDROOT/python-magic-0.4.27-4.fc35.x86_64/usr/lib64/python3.8/site-packages:/home/tkloczko/rpmbuild/BUILDROOT/python-magic-0.4.27-4.fc35.x86_64/usr/lib/python3.8/site-packages
+ /usr/bin/pytest -ra -m 'not network'
==================================================================================== test session starts ====================================================================================
platform linux -- Python 3.8.16, pytest-7.2.2, pluggy-1.0.0
rootdir: /home/tkloczko/rpmbuild/BUILD/python-magic-0.4.27
collected 20 items

test/libmagic_test.py ...                                                                                                                                                             [ 15%]
test/python_magic_test.py ..F...........ss.                                                                                                                                           [100%]

========================================================================================= FAILURES ==========================================================================================
_________________________________________________________________________________ MagicTest.test_extension __________________________________________________________________________________

self = <test.python_magic_test.MagicTest testMethod=test_extension>

    def test_extension(self):
        try:
            m = magic.Magic(extension=True)
>           self.assert_values(m, {
                # some versions return '' for the extensions of a gz file,
                # including w/ the command line.  Who knows...
                'test.gz': ('gz/tgz/tpz/zabw/svgz', '', '???'),
                'name_use.jpg': 'jpeg/jpg/jpe/jfif',
            })

test/python_magic_test.py:134:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
test/python_magic_test.py:53: in assert_values
    self.assertIn(value, expected_value)
E   AssertionError: 'gz/tgz/tpz/zabw/svgz/adz/kmy/xcfgz' not found in ('gz/tgz/tpz/zabw/svgz', '', '???')
===================================================================================== warnings summary ======================================================================================
test/libmagic_test.py::MagicTestCase::test_detect_from_content
test/libmagic_test.py::MagicTestCase::test_detect_from_filename
test/libmagic_test.py::MagicTestCase::test_detect_from_fobj
  /home/tkloczko/rpmbuild/BUILD/python-magic-0.4.27/magic/__init__.py:437: PendingDeprecationWarning: Using compatibility mode with libmagic's python binding. See https://github.com/ahupp/python-magic/blob/master/COMPAT.md for details.
    warnings.warn(

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
================================================================================== short test summary info ==================================================================================
SKIPPED [1] test/python_magic_test.py:143: Magic file doesn't return expected type.
SKIPPED [1] test/python_magic_test.py:153: Magic file doesn't return expected type.
FAILED test/python_magic_test.py::MagicTest::test_extension - AssertionError: 'gz/tgz/tpz/zabw/svgz/adz/kmy/xcfgz' not found in ('gz/tgz/tpz/zabw/svgz', '', '???')
==================================================================== 1 failed, 17 passed, 2 skipped, 3 warnings in 0.14s ====================================================================

Here is list of installed modules in build env

Package         Version
--------------- --------------
attrs           22.2.0
build           0.10.0
distro          1.8.0
exceptiongroup  1.0.0
gpg             1.18.0-unknown
iniconfig       2.0.0
libcomps        0.1.19
packaging       23.0
pip             23.0.1
pluggy          1.0.0
pyproject_hooks 1.0.0
pytest          7.2.2
python-dateutil 2.8.2
rpm             4.17.0
setuptools      65.6.3
six             1.16.0
tomli           2.0.1
wheel           0.38.4

Inizia da test/python_magic_test.py, in particolare da MagicTest.test_extension e assert_values, quindi confronta l’elenco delle estensioni segnalato con la versione di libmagic utilizzata nell’ambiente in cui si verifica il fallimento. Esegui pytest -m 'not network' per verificare il fallimento e confermare che il test delle estensioni abbia esito positivo per tutto il comportamento supportato senza richiedere l’accesso alla rete.

Scritto dal modello di indicizzazione a partire dal testo della issue.

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