1 files changed, 86 insertions, 0 deletions
diff --git a/src/python/grpcio_tests/tests/unit/_error_message_encoding_test.py b/src/python/grpcio_tests/tests/unit/_error_message_encoding_test.py
new file mode 100644
index 0000000000..6c551df3ec
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_error_message_encoding_test.py
@@ -0,0 +1,86 @@
+# Copyright 2018 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Tests 'utf-8' encoded error message."""
+
+import unittest
+import weakref
+
+import grpc
+
+from tests.unit import test_common
+from tests.unit.framework.common import test_constants
+
+_UNICODE_ERROR_MESSAGES = [
+    b'\xe2\x80\x9d'.decode('utf-8'),
+    b'abc\x80\xd0\xaf'.decode('latin-1'),
+    b'\xc3\xa9'.decode('utf-8'),
+]
+
+_REQUEST = b'\x00\x00\x00'
+_RESPONSE = b'\x00\x00\x00'
+
+_UNARY_UNARY = '/test/UnaryUnary'
+
+
+class _MethodHandler(grpc.RpcMethodHandler):
+
+    def __init__(self, request_streaming=None, response_streaming=None):
+        self.request_streaming = request_streaming
+        self.response_streaming = response_streaming
+        self.request_deserializer = None
+        self.response_serializer = None
+        self.unary_stream = None
+        self.stream_unary = None
+        self.stream_stream = None
+
+    def unary_unary(self, request, servicer_context):
+        servicer_context.set_code(grpc.StatusCode.UNKNOWN)
+        servicer_context.set_details(request.decode('utf-8'))
+        return _RESPONSE
+
+
+class _GenericHandler(grpc.GenericRpcHandler):
+
+    def __init__(self, test):
+        self._test = test
+
+    def service(self, handler_call_details):
+        return _MethodHandler()
+
+
+class ErrorMessageEncodingTest(unittest.TestCase):
+
+    def setUp(self):
+        self._server = test_common.test_server()
+        self._server.add_generic_rpc_handlers((_GenericHandler(
+            weakref.proxy(self)),))
+        port = self._server.add_insecure_port('[::]:0')
+        self._server.start()
+        self._channel = grpc.insecure_channel('localhost:%d' % port)
+
+    def tearDown(self):
+        self._server.stop(0)
+
+    def testMessageEncoding(self):
+        for message in _UNICODE_ERROR_MESSAGES:
+            multi_callable = self._channel.unary_unary(_UNARY_UNARY)
+            with self.assertRaises(grpc.RpcError) as cm:
+                multi_callable(message.encode('utf-8'))
+
+            self.assertEqual(cm.exception.code(), grpc.StatusCode.UNKNOWN)
+            self.assertEqual(cm.exception.details(), message)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)