61 lines
2.3 KiB
Python
61 lines
2.3 KiB
Python
from typing import Hashable, Mapping, TypeVar, Union
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from hamcrest.core.base_matcher import BaseMatcher
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from hamcrest.core.description import Description
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from hamcrest.core.helpers.hasmethod import hasmethod
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from hamcrest.core.helpers.wrap_matcher import wrap_matcher
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from hamcrest.core.matcher import Matcher
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__author__ = "Jon Reid"
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__copyright__ = "Copyright 2011 hamcrest.org"
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__license__ = "BSD, see License.txt"
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K = TypeVar("K", bound=Hashable) # TODO - covariant?
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V = TypeVar("V")
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class IsDictContaining(BaseMatcher[Mapping[K, V]]):
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def __init__(self, key_matcher: Matcher[K], value_matcher: Matcher[V]) -> None:
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self.key_matcher = key_matcher
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self.value_matcher = value_matcher
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def _matches(self, item: Mapping[K, V]) -> bool:
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if hasmethod(item, "items"):
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for key, value in item.items():
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if self.key_matcher.matches(key) and self.value_matcher.matches(value):
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return True
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return False
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def describe_to(self, description: Description) -> None:
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description.append_text("a dictionary containing [").append_description_of(
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self.key_matcher
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).append_text(": ").append_description_of(self.value_matcher).append_text("]")
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def has_entry(
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key_match: Union[K, Matcher[K]], value_match: Union[V, Matcher[V]]
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) -> Matcher[Mapping[K, V]]:
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"""Matches if dictionary contains key-value entry satisfying a given pair
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of matchers.
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:param key_match: The matcher to satisfy for the key, or an expected value
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for :py:func:`~hamcrest.core.core.isequal.equal_to` matching.
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:param value_match: The matcher to satisfy for the value, or an expected
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value for :py:func:`~hamcrest.core.core.isequal.equal_to` matching.
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This matcher iterates the evaluated dictionary, searching for any key-value
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entry that satisfies ``key_match`` and ``value_match``. If a matching entry
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is found, ``has_entry`` is satisfied.
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Any argument that is not a matcher is implicitly wrapped in an
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:py:func:`~hamcrest.core.core.isequal.equal_to` matcher to check for
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equality.
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Examples::
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has_entry(equal_to('foo'), equal_to(1))
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has_entry('foo', 1)
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"""
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return IsDictContaining(wrap_matcher(key_match), wrap_matcher(value_match))
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