Add a test of metadata, status code, and details

2 files changed, 524 insertions, 0 deletions

diff --git a/src/python/grpcio/tests/tests.json b/src/python/grpcio/tests/tests.json
index 8e509621a8..e384a2fc13 100644
--- a/src/python/grpcio/tests/tests.json
+++ b/src/python/grpcio/tests/tests.json
@@ -24,6 +24,7 @@
   "_implementations_test.ChannelCredentialsTest", 
   "_insecure_interop_test.InsecureInteropTest", 
   "_logging_pool_test.LoggingPoolTest", 
+  "_metadata_code_details_test.MetadataCodeDetailsTest",
   "_metadata_test.MetadataTest",
   "_not_found_test.NotFoundTest", 
   "_python_plugin_test.PythonPluginTest",
diff --git a/src/python/grpcio/tests/unit/_metadata_code_details_test.py b/src/python/grpcio/tests/unit/_metadata_code_details_test.py
new file mode 100644
index 0000000000..dd74268cbf
--- /dev/null
+++ b/src/python/grpcio/tests/unit/_metadata_code_details_test.py
@@ -0,0 +1,523 @@
+# 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.
+
+"""Tests application-provided metadata, status code, and details."""
+
+import threading
+import unittest
+
+import grpc
+from grpc.framework.foundation import logging_pool
+
+from tests.unit import test_common
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.common import test_control
+
+_SERIALIZED_REQUEST = b'\x46\x47\x48'
+_SERIALIZED_RESPONSE = b'\x49\x50\x51'
+
+_REQUEST_SERIALIZER = lambda unused_request: _SERIALIZED_REQUEST
+_REQUEST_DESERIALIZER = lambda unused_serialized_request: object()
+_RESPONSE_SERIALIZER = lambda unused_response: _SERIALIZED_RESPONSE
+_RESPONSE_DESERIALIZER = lambda unused_serialized_resopnse: object()
+
+_SERVICE = b'test.TestService'
+_UNARY_UNARY = b'UnaryUnary'
+_UNARY_STREAM = b'UnaryStream'
+_STREAM_UNARY = b'StreamUnary'
+_STREAM_STREAM = b'StreamStream'
+
+_CLIENT_METADATA = (
+    (b'client-md-key', b'client-md-key'),
+    (b'client-md-key-bin', b'\x00\x01')
+)
+
+_SERVER_INITIAL_METADATA = (
+    (b'server-initial-md-key', b'server-initial-md-value'),
+    (b'server-initial-md-key-bin', b'\x00\x02')
+)
+
+_SERVER_TRAILING_METADATA = (
+    (b'server-trailing-md-key', b'server-trailing-md-value'),
+    (b'server-trailing-md-key-bin', b'\x00\x03')
+)
+
+_NON_OK_CODE = grpc.StatusCode.NOT_FOUND
+_DETAILS = b'Test details!'
+
+
+class _Servicer(object):
+
+  def __init__(self):
+    self._lock = threading.Lock()
+    self._code = None
+    self._details = None
+    self._exception = False
+    self._return_none = False
+    self._received_client_metadata = None
+
+  def unary_unary(self, request, context):
+    with self._lock:
+      self._received_client_metadata = context.invocation_metadata()
+      context.send_initial_metadata(_SERVER_INITIAL_METADATA)
+      context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
+      if self._code is not None:
+        context.set_code(self._code)
+      if self._details is not None:
+        context.set_details(self._details)
+      if self._exception:
+        raise test_control.Defect()
+      else:
+        return None if self._return_none else object()
+
+  def unary_stream(self, request, context):
+    with self._lock:
+      self._received_client_metadata = context.invocation_metadata()
+      context.send_initial_metadata(_SERVER_INITIAL_METADATA)
+      context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
+      if self._code is not None:
+        context.set_code(self._code)
+      if self._details is not None:
+        context.set_details(self._details)
+      for _ in range(test_constants.STREAM_LENGTH // 2):
+        yield _SERIALIZED_RESPONSE
+      if self._exception:
+        raise test_control.Defect()
+
+  def stream_unary(self, request_iterator, context):
+    with self._lock:
+      self._received_client_metadata = context.invocation_metadata()
+      context.send_initial_metadata(_SERVER_INITIAL_METADATA)
+      context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
+      if self._code is not None:
+        context.set_code(self._code)
+      if self._details is not None:
+        context.set_details(self._details)
+      # TODO(https://github.com/grpc/grpc/issues/6891): just ignore the
+      # request iterator.
+      for ignored_request in request_iterator:
+        pass
+      if self._exception:
+        raise test_control.Defect()
+      else:
+        return None if self._return_none else _SERIALIZED_RESPONSE
+
+  def stream_stream(self, request_iterator, context):
+    with self._lock:
+      self._received_client_metadata = context.invocation_metadata()
+      context.send_initial_metadata(_SERVER_INITIAL_METADATA)
+      context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
+      if self._code is not None:
+        context.set_code(self._code)
+      if self._details is not None:
+        context.set_details(self._details)
+      # TODO(https://github.com/grpc/grpc/issues/6891): just ignore the
+      # request iterator.
+      for ignored_request in request_iterator:
+        pass
+      for _ in range(test_constants.STREAM_LENGTH // 3):
+        yield object()
+      if self._exception:
+        raise test_control.Defect()
+
+  def set_code(self, code):
+    with self._lock:
+      self._code = code
+
+  def set_details(self, details):
+    with self._lock:
+      self._details = details
+
+  def set_exception(self):
+    with self._lock:
+      self._exception = True
+
+  def set_return_none(self):
+    with self._lock:
+      self._return_none = True
+
+  def received_client_metadata(self):
+    with self._lock:
+      return self._received_client_metadata
+
+
+def _generic_handler(servicer):
+  method_handlers = {
+      _UNARY_UNARY: grpc.unary_unary_rpc_method_handler(
+          servicer.unary_unary, request_deserializer=_REQUEST_DESERIALIZER,
+          response_serializer=_RESPONSE_SERIALIZER),
+      _UNARY_STREAM: grpc.unary_stream_rpc_method_handler(
+          servicer.unary_stream),
+      _STREAM_UNARY: grpc.stream_unary_rpc_method_handler(
+          servicer.stream_unary),
+      _STREAM_STREAM: grpc.stream_stream_rpc_method_handler(
+          servicer.stream_stream, request_deserializer=_REQUEST_DESERIALIZER,
+          response_serializer=_RESPONSE_SERIALIZER),
+  }
+  return grpc.method_handlers_generic_handler(_SERVICE, method_handlers)
+
+
+class MetadataCodeDetailsTest(unittest.TestCase):
+
+  def setUp(self):
+    self._servicer = _Servicer()
+    self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+    self._server = grpc.server(
+        (_generic_handler(self._servicer),), self._server_pool)
+    port = self._server.add_insecure_port('[::]:0')
+    self._server.start()
+
+    channel = grpc.insecure_channel('localhost:{}'.format(port))
+    self._unary_unary = channel.unary_unary(
+        b'/'.join((b'', _SERVICE, _UNARY_UNARY,)),
+        request_serializer=_REQUEST_SERIALIZER,
+        response_deserializer=_RESPONSE_DESERIALIZER,)
+    self._unary_stream = channel.unary_stream(
+        b'/'.join((b'', _SERVICE, _UNARY_STREAM,)),)
+    self._stream_unary = channel.stream_unary(
+        b'/'.join((b'', _SERVICE, _STREAM_UNARY,)),)
+    self._stream_stream = channel.stream_stream(
+        b'/'.join((b'', _SERVICE, _STREAM_STREAM,)),
+        request_serializer=_REQUEST_SERIALIZER,
+        response_deserializer=_RESPONSE_DESERIALIZER,)
+
+
+  def testSuccessfulUnaryUnary(self):
+    self._servicer.set_details(_DETAILS)
+
+    unused_response, call = self._unary_unary.with_call(
+        object(), metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, call.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(grpc.StatusCode.OK, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testSuccessfulUnaryStream(self):
+    self._servicer.set_details(_DETAILS)
+
+    call = self._unary_stream(_SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    for _ in call:
+      pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(grpc.StatusCode.OK, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testSuccessfulStreamUnary(self):
+    self._servicer.set_details(_DETAILS)
+
+    unused_response, call = self._stream_unary.with_call(
+        iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+        metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, call.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(grpc.StatusCode.OK, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testSuccessfulStreamStream(self):
+    self._servicer.set_details(_DETAILS)
+
+    call = self._stream_stream(
+        iter([object()] * test_constants.STREAM_LENGTH),
+        metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    for _ in call:
+      pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(grpc.StatusCode.OK, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testCustomCodeUnaryUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._unary_unary.with_call(object(), metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeUnaryStream(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+
+    call = self._unary_stream(_SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    with self.assertRaises(grpc.RpcError):
+      for _ in call:
+        pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testCustomCodeStreamUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._stream_unary.with_call(
+          iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+          metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+          _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+          _SERVER_INITIAL_METADATA,
+          exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+          _SERVER_TRAILING_METADATA,
+          exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeStreamStream(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+
+    call = self._stream_stream(
+        iter([object()] * test_constants.STREAM_LENGTH),
+        metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      for _ in call:
+        pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+          _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeExceptionUnaryUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_exception()
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+     self._unary_unary.with_call(object(), metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeExceptionUnaryStream(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_exception()
+
+    call = self._unary_stream(_SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    with self.assertRaises(grpc.RpcError):
+      for _ in call:
+        pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testCustomCodeExceptionStreamUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_exception()
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._stream_unary.with_call(
+          iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+          metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeExceptionStreamStream(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_exception()
+
+    call = self._stream_stream(
+        iter([object()] * test_constants.STREAM_LENGTH),
+        metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    with self.assertRaises(grpc.RpcError):
+      for _ in call:
+        pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testCustomCodeReturnNoneUnaryUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_return_none()
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._unary_unary.with_call(object(), metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeReturnNoneStreamUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_return_none()
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._stream_unary.with_call(
+          iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+          metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)