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  • Committer: Leo Arias
  • Date: 2014-11-10 19:28:56 UTC
  • mfrom: (345 touch)
  • mto: This revision was merged to the branch mainline in revision 352.
  • Revision ID: leo.arias@canonical.com-20141110192856-rgpksx9n9j0b39yl
Merged with the touch branch.

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tests/memevent/ubuntu_test_cases/memory_usage_measurement/matchers.py
 
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"""Custom matchers used by the tests."""
 
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from autopilot.matchers import Eventually as EventuallyMatcher
 
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from testtools.matchers import Mismatch
 
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def Eventually(matcher):
 
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    """Wrapper around autopilot.matchers.Eventually.
 
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    The aim of the wrapper is just use a different timeout default
 
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    :param matcher: A testools-like matcher that tests the desired condition
 
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    :type matcher: object
 
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    :returns: A value depending on the matcher protocol
 
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    :rtype: None | a mismatch object with information about the mismatch
 
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    """
 
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    return EventuallyMatcher(matcher, timeout=40)
 
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class DoesNotChange(object):
 
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    """Match if two consecutive values are equal."""
 
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    def __init__(self):
 
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        self.old_value = None
 
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        self.value = None
 
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    def __str__(self):
 
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        return 'DoesNotChange()'
 
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    def match(self, value):
 
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        self.old_value = self.value
 
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        self.value = value
 
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        if self.value != self.old_value:
 
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            return Mismatch('Current value ({}) does not match old value ({})'
 
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                            .format(self.value, self.old_value))
 
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        return None