Merge pull request #5393 from nicoddemus/unittest-self-5390

item.obj is again a bound method on TestCase function items

src/_pytest/unittest.py

@@ -114,6 +114,7 @@ class TestCaseFunction(Function):
     def setup(self):
         self._testcase = self.parent.obj(self.name)
         self._fix_unittest_skip_decorator()
+        self._obj = getattr(self._testcase, self.name)
         if hasattr(self, "_request"):
             self._request._fillfixtures()
 
@@ -132,6 +133,7 @@ class TestCaseFunction(Function):
 
     def teardown(self):
         self._testcase = None
+        self._obj = None
 
     def startTest(self, testcase):
         pass