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86 lines
2.1 KiB
Python
86 lines
2.1 KiB
Python
# Authors:
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# Jason Gerard DeRose <jderose@redhat.com>
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#
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# Copyright (C) 2008 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; version 2 only
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""
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Utility functions for the unit tests.
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"""
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class ExceptionNotRaised(Exception):
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"""
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Exception raised when an *expected* exception is *not* raised during a
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unit test.
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"""
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msg = 'expected %s'
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def __init__(self, expected):
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self.expected = expected
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def __str__(self):
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return self.msg % self.expected.__name__
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def raises(exception, callback, *args, **kw):
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"""
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Tests that the expected exception is raised; raises ExceptionNotRaised
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if test fails.
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"""
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raised = False
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try:
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callback(*args, **kw)
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except exception:
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raised = True
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if not raised:
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raise ExceptionNotRaised(exception)
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def getitem(obj, key):
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"""
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Works like getattr but for dictionary interface. Uses this in combination
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with raises() to test that, for example, KeyError is raised.
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"""
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return obj[key]
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def no_set(obj, name, value='some_new_obj'):
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"""
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Tests that attribute cannot be set.
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"""
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raises(AttributeError, setattr, obj, name, value)
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def no_del(obj, name):
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"""
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Tests that attribute cannot be deleted.
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"""
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raises(AttributeError, delattr, obj, name)
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def read_only(obj, name, value='some_new_obj'):
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"""
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Tests that attribute is read-only. Returns attribute.
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"""
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# Test that it cannot be set:
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no_set(obj, name, value)
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# Test that it cannot be deleted:
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no_del(obj, name)
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# Return the attribute
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return getattr(obj, name)
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