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from hamcrest.core.base_matcher import BaseMatcher |
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from hamcrest.core.string_description import StringDescription |
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class SequenceMapsMatcher(BaseMatcher): |
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def __init__(self, matcher_callable, expected_items): |
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self.matcher = matcher_callable |
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self.expected = expected_items |
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self.description = StringDescription() |
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def _matches(self, actual_items): |
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result = True |
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for i, (exp, act) in enumerate(zip(self.expected, actual_items)): |
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matcher = self.matcher(exp) |
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if not matcher.matches(act): |
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self.description.append_text("\n [{0}] ".format(i)) |
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matcher.describe_mismatch(act, self.description) |
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result = False |
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return result |
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def describe_to(self, description): |
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description.append("A collection of items, containing:") |
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for i, item in enumerate(self.expected): |
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description.append_text( |
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"\n [{0}] ".format(i) |
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).append_description_of( |
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self.matcher(item) |
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) |
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def describe_mismatch(self, item, mismatch_description): |
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mismatch_description.append(self.description) |
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def maps(matcher_callable, items): |
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""" |
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Matches if each item of the expected collection matches each corresponding |
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item in the actual collection using the provided matcher_callable and |
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in the same order. |
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That is, if you provide :py:func:`~hamcrest.core.core.isequal.equal_to` |
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as the matcher callable, the 0th item of your actual collection must be equal |
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to the 0th item of you expected collection, 1st == 1st, and so on. |
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Please note, that unlike in most other cases, you shouldn't call the matcher |
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function/callable yourself. |
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`assert_that([1, 2, 3], maps(equal_to, [1, 2, 3])` |
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:param matcher_callable: The matcher callable that must be applied to the items. |
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:type matcher_callable: :py:class:`~hamcrest.core.base_matcher.BaseMatcher` |
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:param items: Expected collection of items |
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:type items: |
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:return: matcher |
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:rtype: :py:class:`~hamcrest.core.base_matcher.BaseMatcher` |
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""" |
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return SequenceMapsMatcher(matcher_callable, items) |
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hamcrest /
PyHamcrest
