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36 lines
913 B
Python
36 lines
913 B
Python
from hamcrest.core.base_matcher import BaseMatcher
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__author__ = "Chris Rose"
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__copyright__ = "Copyright 2012 hamcrest.org"
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__license__ = "BSD, see License.txt"
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class IsEmpty(BaseMatcher):
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def matches(self, item, mismatch_description=None):
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try:
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if len(item) == 0:
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return True
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if mismatch_description:
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mismatch_description \
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.append_text('has %d item(s)' % len(item))
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except TypeError:
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if mismatch_description:
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mismatch_description \
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.append_text('does not support length')
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return False
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def describe_to(self, description):
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description.append_text('an empty collection')
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def empty():
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"""
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This matcher matches any collection-like object that responds to the
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__len__ method, and has a length of 0.
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"""
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return IsEmpty()
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