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"""Implementation of the parametric test support for Python 3.x.
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Thanks for the py3 version to Robert Collins, from the Testing in Python
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mailing list.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2009-2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import unittest
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from unittest import TestSuite
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#-----------------------------------------------------------------------------
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# Classes and functions
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#-----------------------------------------------------------------------------
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def isgenerator(func):
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return hasattr(func,'_generator')
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class IterCallableSuite(TestSuite):
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def __init__(self, iterator, adapter):
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self._iter = iterator
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self._adapter = adapter
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def __iter__(self):
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yield self._adapter(self._iter.__next__)
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class ParametricTestCase(unittest.TestCase):
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"""Write parametric tests in normal unittest testcase form.
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Limitations: the last iteration misses printing out a newline when
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running in verbose mode.
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"""
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def run(self, result=None):
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testMethod = getattr(self, self._testMethodName)
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# For normal tests, we just call the base class and return that
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if isgenerator(testMethod):
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def adapter(next_test):
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ftc = unittest.FunctionTestCase(next_test,
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self.setUp,
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self.tearDown)
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self._nose_case = ftc # Nose 1.0 rejects the test without this
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return ftc
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return IterCallableSuite(testMethod(),adapter).run(result)
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else:
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return super(ParametricTestCase, self).run(result)
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def parametric(func):
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"""Decorator to make a simple function into a normal test via
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unittest."""
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# Hack, until I figure out how to write isgenerator() for python3!!
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func._generator = True
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class Tester(ParametricTestCase):
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test = staticmethod(func)
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Tester.__name__ = func.__name__
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return Tester
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