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+# Copyright 2015, 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.
+
+"""Common construction and destruction for GRPC-backed Face-layer tests."""
+
+import unittest
+
+from grpc._adapter import fore
+from grpc._adapter import rear
+from grpc.framework.base import util
+from grpc.framework.base import implementations as base_implementations
+from grpc.framework.face import implementations as face_implementations
+from grpc.framework.foundation import logging_pool
+from grpc_test.framework.face.testing import coverage
+from grpc_test.framework.face.testing import serial
+from grpc_test.framework.face.testing import test_case
+
+_TIMEOUT = 3
+_MAXIMUM_TIMEOUT = 90
+_MAXIMUM_POOL_SIZE = 4
+
+
+class FaceTestCase(test_case.FaceTestCase, coverage.BlockingCoverage):
+ """Provides abstract Face-layer tests a GRPC-backed implementation."""
+
+ def set_up_implementation(
+ self, name, methods, method_implementations,
+ multi_method_implementation):
+ pool = logging_pool.pool(_MAXIMUM_POOL_SIZE)
+
+ servicer = face_implementations.servicer(
+ pool, method_implementations, multi_method_implementation)
+
+ serialization = serial.serialization(methods)
+
+ fore_link = fore.ForeLink(
+ pool, serialization.request_deserializers,
+ serialization.response_serializers, None, ())
+ fore_link.start()
+ port = fore_link.port()
+ rear_link = rear.RearLink(
+ 'localhost', port, pool,
+ serialization.request_serializers,
+ serialization.response_deserializers, False, None, None, None)
+ rear_link.start()
+ front = base_implementations.front_link(pool, pool, pool)
+ back = base_implementations.back_link(
+ servicer, pool, pool, pool, _TIMEOUT, _MAXIMUM_TIMEOUT)
+ fore_link.join_rear_link(back)
+ back.join_fore_link(fore_link)
+ rear_link.join_fore_link(front)
+ front.join_rear_link(rear_link)
+
+ stub = face_implementations.generic_stub(front, pool)
+ return stub, (rear_link, fore_link, front, back)
+
+ def tear_down_implementation(self, memo):
+ rear_link, fore_link, front, back = memo
+ # TODO(nathaniel): Waiting for the front and back to idle possibly should
+ # not be necessary - investigate as part of graceful shutdown work.
+ util.wait_for_idle(front)
+ util.wait_for_idle(back)
+ rear_link.stop()
+ fore_link.stop()
+
+ @unittest.skip('Service-side failure not transmitted by GRPC.')
+ def testFailedUnaryRequestUnaryResponse(self):
+ raise NotImplementedError()
+
+ @unittest.skip('Service-side failure not transmitted by GRPC.')
+ def testFailedUnaryRequestStreamResponse(self):
+ raise NotImplementedError()
+
+ @unittest.skip('Service-side failure not transmitted by GRPC.')
+ def testFailedStreamRequestUnaryResponse(self):
+ raise NotImplementedError()
+
+ @unittest.skip('Service-side failure not transmitted by GRPC.')
+ def testFailedStreamRequestStreamResponse(self):
+ raise NotImplementedError()