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diff --git a/include/grpc++/test/mock_stream.h b/include/grpc++/test/mock_stream.h
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+/*
+ *
+ * Copyright 2017, 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.
+ *
+ */
+
+#ifndef GRPCXX_TEST_MOCK_STREAM_H
+#define GRPCXX_TEST_MOCK_STREAM_H
+
+#include <stdint.h>
+
+#include <gmock/gmock.h>
+#include <grpc++/impl/codegen/call.h>
+#include <grpc++/support/async_stream.h>
+#include <grpc++/support/async_unary_call.h>
+#include <grpc++/support/sync_stream.h>
+
+namespace grpc {
+namespace testing {
+
+template <class R>
+class MockClientReader : public ClientReaderInterface<R> {
+ public:
+  MockClientReader() = default;
+
+  // ClientStreamingInterface
+  MOCK_METHOD0_T(Finish, Status());
+
+  // ReaderInterface
+  MOCK_METHOD1_T(NextMessageSize, bool(uint32_t*));
+  MOCK_METHOD1_T(Read, bool(R*));
+
+  // ClientReaderInterface
+  MOCK_METHOD0_T(WaitForInitialMetadata, void());
+};
+
+template <class W>
+class MockClientWriter : public ClientWriterInterface<W> {
+ public:
+  MockClientWriter() = default;
+
+  // ClientStreamingInterface
+  MOCK_METHOD0_T(Finish, Status());
+
+  // WriterInterface
+  MOCK_METHOD2_T(Write, bool(const W&, const WriteOptions));
+
+  // ClientWriterInterface
+  MOCK_METHOD0_T(WritesDone, bool());
+};
+
+template <class W, class R>
+class MockClientReaderWriter : public ClientReaderWriterInterface<W, R> {
+ public:
+  MockClientReaderWriter() = default;
+
+  // ClientStreamingInterface
+  MOCK_METHOD0_T(Finish, Status());
+
+  // ReaderInterface
+  MOCK_METHOD1_T(NextMessageSize, bool(uint32_t*));
+  MOCK_METHOD1_T(Read, bool(R*));
+
+  // WriterInterface
+  MOCK_METHOD2_T(Write, bool(const W&, const WriteOptions));
+
+  // ClientReaderWriterInterface
+  MOCK_METHOD0_T(WaitForInitialMetadata, void());
+  MOCK_METHOD0_T(WritesDone, bool());
+};
+
+// TODO: We do not support mocking an async RPC for now.
+
+template <class R>
+class MockClientAsyncResponseReader
+    : public ClientAsyncResponseReaderInterface<R> {
+ public:
+  MockClientAsyncResponseReader() = default;
+
+  MOCK_METHOD1_T(ReadInitialMetadata, void(void*));
+  MOCK_METHOD3_T(Finish, void(R*, Status*, void*));
+};
+
+template <class R>
+class MockClientAsyncReader : public ClientAsyncReaderInterface<R> {
+ public:
+  MockClientAsyncReader() = default;
+
+  // ClientAsyncStreamingInterface
+  MOCK_METHOD1_T(ReadInitialMetadata, void(void*));
+  MOCK_METHOD2_T(Finish, void(Status*, void*));
+
+  // AsyncReaderInterface
+  MOCK_METHOD2_T(Read, void(R*, void*));
+};
+
+template <class W>
+class MockClientAsyncWriter : public ClientAsyncWriterInterface<W> {
+ public:
+  MockClientAsyncWriter() = default;
+
+  // ClientAsyncStreamingInterface
+  MOCK_METHOD1_T(ReadInitialMetadata, void(void*));
+  MOCK_METHOD2_T(Finish, void(Status*, void*));
+
+  // AsyncWriterInterface
+  MOCK_METHOD2_T(Write, void(const W&, void*));
+
+  // ClientAsyncWriterInterface
+  MOCK_METHOD1_T(WritesDone, void(void*));
+};
+
+template <class W, class R>
+class MockClientAsyncReaderWriter
+    : public ClientAsyncReaderWriterInterface<W, R> {
+ public:
+  MockClientAsyncReaderWriter() = default;
+
+  // ClientAsyncStreamingInterface
+  MOCK_METHOD1_T(ReadInitialMetadata, void(void*));
+  MOCK_METHOD2_T(Finish, void(Status*, void*));
+
+  // AsyncWriterInterface
+  MOCK_METHOD2_T(Write, void(const W&, void*));
+
+  // AsyncReaderInterface
+  MOCK_METHOD2_T(Read, void(R*, void*));
+
+  // ClientAsyncReaderWriterInterface
+  MOCK_METHOD1_T(WritesDone, void(void*));
+};
+
+}  // namespace testing
+}  // namespace grpc
+
+#endif  // GRPCXX_TEST_MOCK_STREAM_H