[Python-checkins] r69963 - python/branches/io-c/Lib/test/test_io.py

Wed Feb 25 16:42:59 CET 2009

Author: antoine.pitrou
Date: Wed Feb 25 16:42:59 2009
New Revision: 69963
Log:
Add a test of ABC inheritance
Modified:
 python/branches/io-c/Lib/test/test_io.py
Modified: python/branches/io-c/Lib/test/test_io.py
==============================================================================

--- python/branches/io-c/Lib/test/test_io.py	(original)
+++ python/branches/io-c/Lib/test/test_io.py	Wed Feb 25 16:42:59 2009
@@ -2043,6 +2043,24 @@
 gc.collect()
 self.assert_(wr() is None, wr)
 
+ def test_abc_inheritance(self):
+ # Test implementations inherit (even virtually) from their respective ABCs
+ f = self.open(support.TESTFN, "wb", buffering=0)
+ self.assertTrue(isinstance(f, self.IOBase))
+ self.assertTrue(isinstance(f, self.RawIOBase))
+ self.assertFalse(isinstance(f, self.BufferedIOBase))
+ self.assertFalse(isinstance(f, self.TextIOBase))
+ f = self.open(support.TESTFN, "wb")
+ self.assertTrue(isinstance(f, self.IOBase))
+ self.assertFalse(isinstance(f, self.RawIOBase))
+ self.assertTrue(isinstance(f, self.BufferedIOBase))
+ self.assertFalse(isinstance(f, self.TextIOBase))
+ f = self.open(support.TESTFN, "w")
+ self.assertTrue(isinstance(f, self.IOBase))
+ self.assertFalse(isinstance(f, self.RawIOBase))
+ self.assertFalse(isinstance(f, self.BufferedIOBase))
+ self.assertTrue(isinstance(f, self.TextIOBase))
+
 class CMiscIOTest(MiscIOTest):
 io = io
 
