Mark failing tests for test_codecmaps_kr

Lib/test/test_codecmaps_kr.py

@@ -11,6 +11,10 @@ class TestCP949Map(multibytecodec_support.TestBase_Mapping,
     encoding = 'cp949'
     mapfileurl = 'http://www.pythontest.net/unicode/CP949.TXT'
 
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; LookupError: unknown encoding: cp949
+    def test_mapping_file(self):
+        return super().test_mapping_file()
+
 
 class TestEUCKRMap(multibytecodec_support.TestBase_Mapping,
                    unittest.TestCase):
@@ -21,6 +25,10 @@ class TestEUCKRMap(multibytecodec_support.TestBase_Mapping,
     pass_enctest = [(b'\xa4\xd4', '\u3164')]
     pass_dectest = [(b'\xa4\xd4', '\u3164')]
 
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; LookupError: unknown encoding: euc_kr
+    def test_mapping_file(self):
+        return super().test_mapping_file()
+
 
 class TestJOHABMap(multibytecodec_support.TestBase_Mapping,
                    unittest.TestCase):
@@ -33,5 +41,9 @@ class TestJOHABMap(multibytecodec_support.TestBase_Mapping,
     pass_enctest = [(b'\\', '\u20a9')]
     pass_dectest = [(b'\\', '\u20a9')]
 
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; LookupError: unknown encoding: johab
+    def test_mapping_file(self):
+        return super().test_mapping_file()
+
 if __name__ == "__main__":
     unittest.main()