1 files changed, 283 insertions, 0 deletions
diff --git a/test/cpp/end2end/client_callback_end2end_test.cc b/test/cpp/end2end/client_callback_end2end_test.cc
new file mode 100644
index 0000000000..a35991396a
--- /dev/null
+++ b/test/cpp/end2end/client_callback_end2end_test.cc
@@ -0,0 +1,283 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <functional>
+#include <mutex>
+#include <thread>
+
+#include <grpcpp/channel.h>
+#include <grpcpp/client_context.h>
+#include <grpcpp/create_channel.h>
+#include <grpcpp/generic/generic_stub.h>
+#include <grpcpp/impl/codegen/proto_utils.h>
+#include <grpcpp/server.h>
+#include <grpcpp/server_builder.h>
+#include <grpcpp/server_context.h>
+#include <grpcpp/support/client_callback.h>
+
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/test_config.h"
+#include "test/cpp/end2end/test_service_impl.h"
+#include "test/cpp/util/byte_buffer_proto_helper.h"
+#include "test/cpp/util/string_ref_helper.h"
+
+#include <gtest/gtest.h>
+
+namespace grpc {
+namespace testing {
+namespace {
+
+class TestScenario {
+ public:
+  TestScenario(bool serve_callback) : callback_server(serve_callback) {}
+  void Log() const;
+  bool callback_server;
+};
+
+static std::ostream& operator<<(std::ostream& out,
+                                const TestScenario& scenario) {
+  return out << "TestScenario{callback_server="
+             << (scenario.callback_server ? "true" : "false") << "}";
+}
+
+void TestScenario::Log() const {
+  std::ostringstream out;
+  out << *this;
+  gpr_log(GPR_DEBUG, "%s", out.str().c_str());
+}
+
+class ClientCallbackEnd2endTest
+    : public ::testing::TestWithParam<TestScenario> {
+ protected:
+  ClientCallbackEnd2endTest() { GetParam().Log(); }
+
+  void SetUp() override {
+    ServerBuilder builder;
+
+    if (!GetParam().callback_server) {
+      builder.RegisterService(&service_);
+    } else {
+      builder.RegisterService(&callback_service_);
+    }
+
+    server_ = builder.BuildAndStart();
+    is_server_started_ = true;
+  }
+
+  void ResetStub() {
+    ChannelArguments args;
+    channel_ = server_->InProcessChannel(args);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel_);
+    generic_stub_.reset(new GenericStub(channel_));
+  }
+
+  void TearDown() override {
+    if (is_server_started_) {
+      server_->Shutdown();
+    }
+  }
+
+  void SendRpcs(int num_rpcs, bool with_binary_metadata) {
+    grpc::string test_string("");
+    for (int i = 0; i < num_rpcs; i++) {
+      EchoRequest request;
+      EchoResponse response;
+      ClientContext cli_ctx;
+
+      test_string += "Hello world. ";
+      request.set_message(test_string);
+      grpc::string val;
+      if (with_binary_metadata) {
+        request.mutable_param()->set_echo_metadata(true);
+        char bytes[8] = {'\0', '\1', '\2', '\3',
+                         '\4', '\5', '\6', static_cast<char>(i)};
+        val = grpc::string(bytes, 8);
+        cli_ctx.AddMetadata("custom-bin", val);
+      }
+
+      cli_ctx.set_compression_algorithm(GRPC_COMPRESS_GZIP);
+
+      std::mutex mu;
+      std::condition_variable cv;
+      bool done = false;
+      stub_->experimental_async()->Echo(
+          &cli_ctx, &request, &response,
+          [&cli_ctx, &request, &response, &done, &mu, &cv, val,
+           with_binary_metadata](Status s) {
+            GPR_ASSERT(s.ok());
+
+            EXPECT_EQ(request.message(), response.message());
+            if (with_binary_metadata) {
+              EXPECT_EQ(
+                  1u, cli_ctx.GetServerTrailingMetadata().count("custom-bin"));
+              EXPECT_EQ(val, ToString(cli_ctx.GetServerTrailingMetadata()
+                                          .find("custom-bin")
+                                          ->second));
+            }
+            std::lock_guard<std::mutex> l(mu);
+            done = true;
+            cv.notify_one();
+          });
+      std::unique_lock<std::mutex> l(mu);
+      while (!done) {
+        cv.wait(l);
+      }
+    }
+  }
+
+  void SendRpcsGeneric(int num_rpcs, bool maybe_except) {
+    const grpc::string kMethodName("/grpc.testing.EchoTestService/Echo");
+    grpc::string test_string("");
+    for (int i = 0; i < num_rpcs; i++) {
+      EchoRequest request;
+      std::unique_ptr<ByteBuffer> send_buf;
+      ByteBuffer recv_buf;
+      ClientContext cli_ctx;
+
+      test_string += "Hello world. ";
+      request.set_message(test_string);
+      send_buf = SerializeToByteBuffer(&request);
+
+      std::mutex mu;
+      std::condition_variable cv;
+      bool done = false;
+      generic_stub_->experimental().UnaryCall(
+          &cli_ctx, kMethodName, send_buf.get(), &recv_buf,
+          [&request, &recv_buf, &done, &mu, &cv, maybe_except](Status s) {
+            GPR_ASSERT(s.ok());
+
+            EchoResponse response;
+            EXPECT_TRUE(ParseFromByteBuffer(&recv_buf, &response));
+            EXPECT_EQ(request.message(), response.message());
+            std::lock_guard<std::mutex> l(mu);
+            done = true;
+            cv.notify_one();
+#if GRPC_ALLOW_EXCEPTIONS
+            if (maybe_except) {
+              throw - 1;
+            }
+#else
+            GPR_ASSERT(!maybe_except);
+#endif
+          });
+      std::unique_lock<std::mutex> l(mu);
+      while (!done) {
+        cv.wait(l);
+      }
+    }
+  }
+
+  bool is_server_started_;
+  std::shared_ptr<Channel> channel_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
+  std::unique_ptr<grpc::GenericStub> generic_stub_;
+  TestServiceImpl service_;
+  CallbackTestServiceImpl callback_service_;
+  std::unique_ptr<Server> server_;
+};
+
+TEST_P(ClientCallbackEnd2endTest, SimpleRpc) {
+  ResetStub();
+  SendRpcs(1, false);
+}
+
+TEST_P(ClientCallbackEnd2endTest, SequentialRpcs) {
+  ResetStub();
+  SendRpcs(10, false);
+}
+
+TEST_P(ClientCallbackEnd2endTest, SequentialRpcsWithVariedBinaryMetadataValue) {
+  ResetStub();
+  SendRpcs(10, true);
+}
+
+TEST_P(ClientCallbackEnd2endTest, SequentialGenericRpcs) {
+  ResetStub();
+  SendRpcsGeneric(10, false);
+}
+
+#if GRPC_ALLOW_EXCEPTIONS
+TEST_P(ClientCallbackEnd2endTest, ExceptingRpc) {
+  ResetStub();
+  SendRpcsGeneric(10, true);
+}
+#endif
+
+TEST_P(ClientCallbackEnd2endTest, MultipleRpcsWithVariedBinaryMetadataValue) {
+  ResetStub();
+  std::vector<std::thread> threads;
+  threads.reserve(10);
+  for (int i = 0; i < 10; ++i) {
+    threads.emplace_back([this] { SendRpcs(10, true); });
+  }
+  for (int i = 0; i < 10; ++i) {
+    threads[i].join();
+  }
+}
+
+TEST_P(ClientCallbackEnd2endTest, MultipleRpcs) {
+  ResetStub();
+  std::vector<std::thread> threads;
+  threads.reserve(10);
+  for (int i = 0; i < 10; ++i) {
+    threads.emplace_back([this] { SendRpcs(10, false); });
+  }
+  for (int i = 0; i < 10; ++i) {
+    threads[i].join();
+  }
+}
+
+TEST_P(ClientCallbackEnd2endTest, CancelRpcBeforeStart) {
+  ResetStub();
+  EchoRequest request;
+  EchoResponse response;
+  ClientContext context;
+  request.set_message("hello");
+  context.TryCancel();
+
+  std::mutex mu;
+  std::condition_variable cv;
+  bool done = false;
+  stub_->experimental_async()->Echo(
+      &context, &request, &response, [&response, &done, &mu, &cv](Status s) {
+        EXPECT_EQ("", response.message());
+        EXPECT_EQ(grpc::StatusCode::CANCELLED, s.error_code());
+        std::lock_guard<std::mutex> l(mu);
+        done = true;
+        cv.notify_one();
+      });
+  std::unique_lock<std::mutex> l(mu);
+  while (!done) {
+    cv.wait(l);
+  }
+}
+
+TestScenario scenarios[] = {TestScenario{false}, TestScenario{true}};
+
+INSTANTIATE_TEST_CASE_P(ClientCallbackEnd2endTest, ClientCallbackEnd2endTest,
+                        ::testing::ValuesIn(scenarios));
+
+}  // namespace
+}  // namespace testing
+}  // namespace grpc
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}