adjust successful/failing tests from unittest/test

Lib/unittest/test/test_async_case.py

@@ -37,7 +37,8 @@ class LacksExit:
         pass
 
 
-VAR = contextvars.ContextVar('VAR', default=())
+# TODO: RUSTPYTHON; used by following test suite
+# VAR = contextvars.ContextVar('VAR', default=())
 
 
 @unittest.skip("TODO: RUSTPYTHON; requires sys.get_coroutine_origin_tracking_depth()")

Lib/unittest/test/test_runner.py

@@ -1293,8 +1293,6 @@ class Test_TextTestRunner(unittest.TestCase):
         expectedresult = (runner.stream, DESCRIPTIONS, VERBOSITY)
         self.assertEqual(runner._makeResult(), expectedresult)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     @support.requires_subprocess()
     def test_warnings(self):
         """