Set __qualname__ equal to __name__ on derived classes

To make output on Python ≥ 3.5 the same as on previous Python versions.

This fixes #928.

functional_tests/test_load_tests_from_test_case.py

@@ -29,6 +29,7 @@ def setUp(self):
                 pass
             def tearDown(self):
                 pass
+        Derived.__qualname__ = Derived.__name__
         # must use nose loader here because the default loader in 2.3
         # won't load tests from base classes
         l = loader.TestLoader()

nose/util.py

@@ -643,6 +643,7 @@ class C(cls):
         pass
     C.__module__ = module
     C.__name__ = cls.__name__
+    C.__qualname__ = cls.__name__
     return C
 
 

unit_tests/test_xunit.py

@@ -16,6 +16,7 @@ def mktest():
     class TC(unittest.TestCase):
         def runTest(self):
             pass
+    TC.__qualname__ = TC.__name__
     test = TC()
     return test