/usr/lib/python3/dist-packages/hamcrest/core/matcher.py is in python3-hamcrest 1.8.0-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | from .selfdescribing import SelfDescribing
__author__ = "Jon Reid"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"
class Matcher(SelfDescribing):
"""A matcher over acceptable values.
A matcher is able to describe itself to give feedback when it fails.
Matcher implementations should *not* directly implement this protocol.
Instead, *extend* the :py:class:`~hamcrest.core.base_matcher.BaseMatcher`
class, which will ensure that the
:py:class:`~hamcrest.core.matcher.Matcher` API can grow to support new
features and remain compatible with all
:py:class:`~hamcrest.core.matcher.Matcher` implementations.
"""
def matches(self, item, mismatch_description=None):
"""Evaluates the matcher for argument item.
If a mismatch is detected and argument ``mismatch_description`` is
provided, it will generate a description of why the matcher has not
accepted the item.
:param item: The object against which the matcher is evaluated.
:returns: ``True`` if ``item`` matches, otherwise ``False``.
"""
raise NotImplementedError('matches')
def describe_mismatch(self, item, mismatch_description):
"""Generates a description of why the matcher has not accepted the
item.
The description will be part of a larger description of why a matching
failed, so it should be concise.
This method assumes that ``matches(item)`` is ``False``, but will not
check this.
:param item: The item that the
:py:class:`~hamcrest.core.matcher.Matcher` has rejected.
:param mismatch_description: The description to be built or appended
to.
"""
raise NotImplementedError('describe_mismatch')
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