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How to use test_devenv_does_not_allow_multiple_environments method in tox

Best Python code snippet using tox_python

test_z_cmdline.py

Source:test_z_cmdline.py

...806    result.assert_success()807    # `--devenv` defaults to the `py` environment and a develop install808    assert "py develop-inst:" in result.out809    assert re.search("py create:.*venv", result.out)810def test_devenv_does_not_allow_multiple_environments(initproj, cmd):811    initproj(812        "example123",813        filedefs={814            "setup.py": """\815                from setuptools import setup816                setup(name='x')817            """,818            "tox.ini": """\819            [tox]820            envlist=foo,bar,baz821            """,822        },823    )824    result = cmd("--devenv", "venv", "-e", "foo,bar")...

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