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How to use _alwayscopy_not_supported method in tox

Best Python code snippet using tox_python

test_z_cmdline.py

Source:test_z_cmdline.py

...655    cmd()656    result = cmd()657    assert "develop-inst-noop" in result.out658    assert "I am a warning" in result.err659def _alwayscopy_not_supported():660    # This is due to virtualenv bugs with alwayscopy in some platforms661    # see: https://github.com/pypa/virtualenv/issues/565662    supported = True663    tmpdir = tempfile.mkdtemp()664    try:665        with open(os.devnull) as fp:666            subprocess.check_call(667                [sys.executable, "-m", "virtualenv", "--always-copy", tmpdir],668                stdout=fp,669                stderr=fp,670            )671    except subprocess.CalledProcessError:672        supported = False673    finally:674        shutil.rmtree(tmpdir)675    return not supported676alwayscopy_not_supported = _alwayscopy_not_supported()677@pytest.mark.skipif(alwayscopy_not_supported, reason="Platform doesnt support alwayscopy")678def test_alwayscopy(initproj, cmd):679    initproj(680        "example123",681        filedefs={682            "tox.ini": """683            [testenv]684            commands={envpython} --version685            alwayscopy=True686    """,687        },688    )689    result = cmd("-vv")690    result.assert_success()...

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