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from hamcrest.core.base_matcher import BaseMatcher
from hamcrest.core.helpers.hasmethod import hasmethod
from hamcrest.core.helpers.wrap_matcher import wrap_matcher
__author__ = "Jon Reid"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"
class IsDictContainingKey(BaseMatcher):
def __init__(self, key_matcher):
self.key_matcher = key_matcher
def _matches(self, dictionary):
if hasmethod(dictionary, 'keys'):
for key in dictionary.keys():
if self.key_matcher.matches(key):
return True
return False
def describe_to(self, description):
description.append_text('a dictionary containing key ') \
.append_description_of(self.key_matcher)
def has_key(key_match):
"""Matches if dictionary contains an entry whose key satisfies a given
matcher.
:param key_match: The matcher to satisfy for the key, or an expected value
for :py:func:`~hamcrest.core.core.isequal.equal_to` matching.
This matcher iterates the evaluated dictionary, searching for any key-value
entry whose key satisfies the given matcher. If a matching entry is found,
``has_key`` is satisfied.
Any argument that is not a matcher is implicitly wrapped in an
:py:func:`~hamcrest.core.core.isequal.equal_to` matcher to check for
equality.
Examples::
has_key(equal_to('foo'))
has_key('foo')
"""
return IsDictContainingKey(wrap_matcher(key_match))