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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 IsDictContaining(BaseMatcher):
def __init__(self, key_matcher, value_matcher):
self.key_matcher = key_matcher
self.value_matcher = value_matcher
def _matches(self, dictionary):
if hasmethod(dictionary, 'items'):
for key, value in dictionary.items():
if self.key_matcher.matches(key) and self.value_matcher.matches(value):
return True
return False
def describe_to(self, description):
description.append_text('a dictionary containing [') \
.append_description_of(self.key_matcher) \
.append_text(': ') \
.append_description_of(self.value_matcher) \
.append_text(']')
def has_entry(key_match, value_match):
"""Matches if dictionary contains key-value entry satisfying a given pair
of matchers.
:param key_match: The matcher to satisfy for the key, or an expected value
for :py:func:`~hamcrest.core.core.isequal.equal_to` matching.
:param value_match: The matcher to satisfy for the value, 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 that satisfies ``key_match`` and ``value_match``. If a matching entry
is found, ``has_entry`` 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_entry(equal_to('foo'), equal_to(1))
has_entry('foo', 1)
"""
return IsDictContaining(wrap_matcher(key_match), wrap_matcher(value_match))
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