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from hamcrest.core.base_matcher import BaseMatcher |
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import re |
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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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ARG_PATTERN = re.compile('%([0-9]+)') |
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class DescribedAs(BaseMatcher): |
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def __init__(self, description_template, matcher, *values): |
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self.template = description_template |
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self.matcher = matcher |
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self.values = values |
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def matches(self, item, mismatch_description=None): |
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return self.matcher.matches(item, mismatch_description) |
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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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text_start = 0 |
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for match in re.finditer(ARG_PATTERN, self.template): |
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description.append_text(self.template[text_start:match.start()]) |
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arg_index = int(match.group()[1:]) |
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description.append_description_of(self.values[arg_index]) |
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text_start = match.end() |
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if text_start < len(self.template): |
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description.append_text(self.template[text_start:]) |
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def described_as(description, matcher, *values): |
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"""Adds custom failure description to a given matcher. |
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:param description: Overrides the matcher's description. |
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:param matcher: The matcher to satisfy. |
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:param value1,...: Optional comma-separated list of substitution values. |
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The description may contain substitution placeholders %0, %1, etc. These |
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will be replaced by any values that follow the matcher. |
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""" |
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return DescribedAs(description, matcher, *values) |
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hamcrest /
PyHamcrest
