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__author__ = "Jon Reid"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"
from hamcrest.core.base_matcher import BaseMatcher
from hamcrest.core.core.allof import all_of
from hamcrest.core.helpers.hasmethod import hasmethod
from hamcrest.core.helpers.wrap_matcher import wrap_matcher
class IsSequenceContaining(BaseMatcher):
def __init__(self, element_matcher):
self.element_matcher = element_matcher
def _matches(self, sequence):
try:
for item in sequence:
if self.element_matcher.matches(item):
return True
except TypeError: # not a sequence
return False
def describe_to(self, description):
description.append_text('a sequence containing ') \
.append_description_of(self.element_matcher)
# It'd be great to make use of all_of, but we can't be sure we won't
# be seeing a one-time sequence here (like a generator); see issue #20
# Instead, we wrap it inside a class that will convert the sequence into
# a concrete list and then hand it off to the all_of matcher.
class IsSequenceContainingEvery(BaseMatcher):
def __init__(self, *element_matchers):
delegates = [has_item(e) for e in element_matchers]
self.matcher = all_of(*delegates)
def _matches(self, sequence):
try:
return self.matcher.matches(list(sequence))
except TypeError:
return False
def describe_mismatch(self, item, mismatch_description):
self.matcher.describe_mismatch(item, mismatch_description)
def describe_to(self, description):
self.matcher.describe_to(description)
def has_item(match):
"""Matches if any element of sequence satisfies a given matcher.
:param match: The matcher to satisfy, or an expected value for
:py:func:`~hamcrest.core.core.isequal.equal_to` matching.
This matcher iterates the evaluated sequence, searching for any element
that satisfies a given matcher. If a matching element is found,
``has_item`` is satisfied.
If the ``match`` argument is not a matcher, it is implicitly wrapped in an
:py:func:`~hamcrest.core.core.isequal.equal_to` matcher to check for
equality.
"""
return IsSequenceContaining(wrap_matcher(match))
def has_items(*items):
"""Matches if all of the given matchers are satisfied by any elements of
the sequence.
:param match1,...: A comma-separated list of matchers.
This matcher iterates the given matchers, searching for any elements in the
evaluated sequence that satisfy them. If each matcher is satisfied, then
``has_items`` 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.
"""
matchers = []
for item in items:
matchers.append(wrap_matcher(item))
return IsSequenceContainingEvery(*matchers)