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# IPython: modified copy of numpy.testing.noseclasses, so
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# IPython.external._decorators works without numpy being installed.
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# These classes implement a "known failure" error class.
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import os
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from nose.plugins.errorclass import ErrorClass, ErrorClassPlugin
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try:
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import pytest
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KnownFailureTest = pytest.xfail.Exception
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except ImportError:
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class KnownFailureTest(Exception):
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"""Raise this exception to mark a test as a known failing test."""
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class KnownFailure(ErrorClassPlugin):
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'''Plugin that installs a KNOWNFAIL error class for the
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KnownFailureClass exception. When KnownFailureTest is raised,
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the exception will be logged in the knownfail attribute of the
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result, 'K' or 'KNOWNFAIL' (verbose) will be output, and the
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exception will not be counted as an error or failure.'''
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enabled = True
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knownfail = ErrorClass(KnownFailureTest,
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label='KNOWNFAIL',
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isfailure=False)
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def options(self, parser, env=os.environ):
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env_opt = 'NOSE_WITHOUT_KNOWNFAIL'
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parser.add_option('--no-knownfail', action='store_true',
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dest='noKnownFail', default=env.get(env_opt, False),
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help='Disable special handling of KnownFailureTest '
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'exceptions')
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def configure(self, options, conf):
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if not self.can_configure:
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return
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self.conf = conf
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disable = getattr(options, 'noKnownFail', False)
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if disable:
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self.enabled = False
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