mark new failing tests

Lib/test/test_sys.py

@@ -75,6 +75,8 @@ class ActiveExceptionTests(unittest.TestCase):
     def test_exc_info_no_exception(self):
         self.assertEqual(sys.exc_info(), (None, None, None))
 
+    # TODO: RUSTPYTHON; AttributeError: module 'sys' has no attribute 'exception'
+    @unittest.expectedFailure
     def test_sys_exception_no_exception(self):
         self.assertEqual(sys.exception(), None)
 
@@ -108,6 +110,8 @@ class ActiveExceptionTests(unittest.TestCase):
         self.assertIs(exc_info[1], e)
         self.assertIs(exc_info[2], e.__traceback__)
 
+    # TODO: RUSTPYTHON; AttributeError: module 'sys' has no attribute 'exception'
+    @unittest.expectedFailure
     def test_sys_exception_with_exception_instance(self):
         def f():
             raise ValueError(42)
@@ -121,6 +125,8 @@ class ActiveExceptionTests(unittest.TestCase):
         self.assertIsInstance(e, ValueError)
         self.assertIs(exc, e)
 
+    # TODO: RUSTPYTHON; AttributeError: module 'sys' has no attribute 'exception'
+    @unittest.expectedFailure
     def test_sys_exception_with_exception_type(self):
         def f():
             raise ValueError
@@ -1135,6 +1141,8 @@ class SysModuleTest(unittest.TestCase):
         for name in sys.stdlib_module_names:
             self.assertIsInstance(name, str)
 
+    # TODO: RUSTPYTHON, AttributeError: module 'sys' has no attribute '_stdlib_dir'
+    @unittest.expectedFailure
     def test_stdlib_dir(self):
         os = import_helper.import_fresh_module('os')
         marker = getattr(os, '__file__', None)