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