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Introduce no_fnmatch_line/no_re_match_line in pytester (#5914)
Introduce no_fnmatch_line/no_re_match_line in pytester
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``pytester`` learned two new functions, `no_fnmatch_line <https://docs.pytest.org/en/latest/reference.html#_pytest.pytester.LineMatcher.no_fnmatch_line>`_ and | ||
`no_re_match_line <https://docs.pytest.org/en/latest/reference.html#_pytest.pytester.LineMatcher.no_re_match_line>`_. | ||
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The functions are used to ensure the captured text *does not* match the given | ||
pattern. | ||
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The previous idiom was to use ``re.match``: | ||
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.. code-block:: python | ||
assert re.match(pat, result.stdout.str()) is None | ||
Or the ``in`` operator: | ||
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.. code-block:: python | ||
assert text in result.stdout.str() | ||
But the new functions produce best output on failure. |
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