Added unit test for empty request/responses

src/python/grpcio/tests/tests.json

@@ -28,6 +28,7 @@
   "_crust_over_core_over_links_face_interface_test.GenericInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_crust_over_core_over_links_face_interface_test.MultiCallableInvokerBlockingInvocationInlineServiceTest", 
   "_crust_over_core_over_links_face_interface_test.MultiCallableInvokerFutureInvocationAsynchronousEventServiceTest", 
+  "_empty_message_test.EmptyMessageTest",
   "_face_interface_test.DynamicInvokerBlockingInvocationInlineServiceTest", 
   "_face_interface_test.DynamicInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_face_interface_test.GenericInvokerBlockingInvocationInlineServiceTest", 

src/python/grpcio/tests/unit/_empty_message_test.py

@@ -0,0 +1,137 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import unittest
+
+import grpc
+from grpc.framework.foundation import logging_pool
+
+from tests.unit.framework.common import test_constants
+
+_REQUEST = b''
+_RESPONSE = b''
+
+_UNARY_UNARY = b'/test/UnaryUnary'
+_UNARY_STREAM = b'/test/UnaryStream'
+_STREAM_UNARY = b'/test/StreamUnary'
+_STREAM_STREAM = b'/test/StreamStream'
+
+
+def handle_unary_unary(request, servicer_context):
+  return _RESPONSE
+
+
+def handle_unary_stream(request, servicer_context):
+  for _ in range(test_constants.STREAM_LENGTH):
+    yield _RESPONSE
+
+
+def handle_stream_unary(request_iterator, servicer_context):
+  for request in request_iterator:
+    pass
+  return _RESPONSE
+
+
+def handle_stream_stream(request_iterator, servicer_context):
+  for request in request_iterator:
+    yield _RESPONSE
+
+
+class _MethodHandler(grpc.RpcMethodHandler):
+
+  def __init__(self, request_streaming, response_streaming):
+    self.request_streaming = request_streaming
+    self.response_streaming = response_streaming
+    self.request_deserializer = None
+    self.response_serializer = None
+    self.unary_unary = None
+    self.unary_stream = None
+    self.stream_unary = None
+    self.stream_stream = None
+    if self.request_streaming and self.response_streaming:
+      self.stream_stream = handle_stream_stream
+    elif self.request_streaming:
+      self.stream_unary = handle_stream_unary
+    elif self.response_streaming:
+      self.unary_stream = handle_unary_stream
+    else:
+      self.unary_unary = handle_unary_unary
+
+
+class _GenericHandler(grpc.GenericRpcHandler):
+
+  def service(self, handler_call_details):
+    if handler_call_details.method == _UNARY_UNARY:
+      return _MethodHandler(False, False)
+    elif handler_call_details.method == _UNARY_STREAM:
+      return _MethodHandler(False, True)
+    elif handler_call_details.method == _STREAM_UNARY:
+      return _MethodHandler(True, False)
+    elif handler_call_details.method == _STREAM_STREAM:
+      return _MethodHandler(True, True)
+    else:
+      return None
+
+
+class EmptyMessageTest(unittest.TestCase):
+
+  def setUp(self):
+    self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+    self._server = grpc.server((_GenericHandler(),), self._server_pool)
+    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 testUnaryUnary(self):
+    response = self._channel.unary_unary(_UNARY_UNARY)(_REQUEST)
+    self.assertEqual(_RESPONSE, response)
+
+  def testUnaryStream(self):
+    response_iterator = self._channel.unary_stream(_UNARY_STREAM)(_REQUEST)
+    self.assertSequenceEqual(
+        [_RESPONSE] * test_constants.STREAM_LENGTH, list(response_iterator))
+
+  def testStreamUnary(self):
+    response = self._channel.stream_unary(_STREAM_UNARY)(
+        [_REQUEST] * test_constants.STREAM_LENGTH)
+    self.assertEqual(_RESPONSE, response)
+
+  def testStreamStream(self):
+    response_iterator = self._channel.stream_stream(_STREAM_STREAM)(
+        [_REQUEST] * test_constants.STREAM_LENGTH)
+    self.assertSequenceEqual(
+        [_RESPONSE] * test_constants.STREAM_LENGTH, list(response_iterator))
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)
+