Fix unicode upgrade of patch.

tests/patch_test.py

Index: tests/patch_test.py
diff --git a/tests/patch_test.py b/tests/patch_test.py
index 671e5c92579fe035bd619662162cc32c14cf0ad9..68cda901d527668bf069a308117d26686f86f17b 100755
--- a/tests/patch_test.py
+++ b/tests/patch_test.py
@@ -275,6 +275,12 @@ class PatchTest(unittest.TestCase):
         p, 'file_b', RAW.MINIMAL_RENAME, source_filename='file_a', is_new=True,
         nb_hunks=0)
 
+  def testUnicodeFilenameGet(self):
+    p = patch.FilePatchDiff(u'file_b', RAW.MINIMAL_RENAME, [])

[cmp, 2012/02/14 18:11:59]

This string (u'file_b') can be both encoded and decoded through 'utf-8'.  I
think a better test would be a unicode string that contains a unicode character
(like '\ua000') which can only be utf-8 encoded (u'\ua000' cannot be utf-8
decoded).  WDYT?

+    self.assertTrue(isinstance(p.get(False), str))
+    p.set_relpath('foo')
+    self.assertTrue(isinstance(p.get(False), str))
+
   def testGitCopyPartial(self):
     p = patch.FilePatchDiff('wtf2', GIT.COPY_PARTIAL, [])
     self._check_patch(