python 封装testcase参考

address:https://code.google.com/p/quodlibet/source/browse/quodlibet/tests/__init__.py
[popexizhi]
封装testcase参考，参加以下，定义自己的错误类
----------------------------

class TestCase(OrigTestCase):

# silence deprec warnings about useless renames

failUnless = OrigTestCase.assertTrue

failIf = OrigTestCase.assertFalse

failUnlessEqual = OrigTestCase.assertEqual

failUnlessRaises = OrigTestCase.assertRaises

failUnlessAlmostEqual = OrigTestCase.assertAlmostEqual

failIfEqual = OrigTestCase.assertNotEqual

failIfAlmostEqual = OrigTestCase.assertNotAlmostEqual