1 /*
2 *
3 * Copyright 2018 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19 #include <memory>
20 #include <vector>
21
22 #include <gtest/gtest.h>
23
24 #include <grpcpp/channel.h>
25 #include <grpcpp/client_context.h>
26 #include <grpcpp/create_channel.h>
27 #include <grpcpp/generic/generic_stub.h>
28 #include <grpcpp/impl/codegen/delegating_channel.h>
29 #include <grpcpp/impl/codegen/proto_utils.h>
30 #include <grpcpp/server.h>
31 #include <grpcpp/server_builder.h>
32 #include <grpcpp/server_context.h>
33 #include <grpcpp/support/client_interceptor.h>
34
35 #include "src/proto/grpc/testing/echo.grpc.pb.h"
36 #include "test/core/util/port.h"
37 #include "test/core/util/test_config.h"
38 #include "test/cpp/end2end/test_service_impl.h"
39 #include "test/cpp/util/byte_buffer_proto_helper.h"
40 #include "test/cpp/util/string_ref_helper.h"
41
42 namespace grpc {
43 namespace testing {
44 namespace {
45
46 class TestChannel : public experimental::DelegatingChannel {
47 public:
TestChannel(const std::shared_ptr<ChannelInterface> & delegate_channel)48 explicit TestChannel(
49 const std::shared_ptr<ChannelInterface>& delegate_channel)
50 : experimental::DelegatingChannel(delegate_channel) {}
51 // Always returns GRPC_CHANNEL_READY
GetState(bool)52 grpc_connectivity_state GetState(bool /*try_to_connect*/) override {
53 return GRPC_CHANNEL_READY;
54 }
55 };
56
57 class DelegatingChannelTest : public ::testing::Test {
58 protected:
DelegatingChannelTest()59 DelegatingChannelTest() {
60 int port = grpc_pick_unused_port_or_die();
61 ServerBuilder builder;
62 server_address_ = "localhost:" + std::to_string(port);
63 builder.AddListeningPort(server_address_, InsecureServerCredentials());
64 builder.RegisterService(&service_);
65 server_ = builder.BuildAndStart();
66 }
67
~DelegatingChannelTest()68 ~DelegatingChannelTest() override { server_->Shutdown(); }
69
70 std::string server_address_;
71 TestServiceImpl service_;
72 std::unique_ptr<Server> server_;
73 };
74
TEST_F(DelegatingChannelTest,SimpleTest)75 TEST_F(DelegatingChannelTest, SimpleTest) {
76 auto channel = CreateChannel(server_address_, InsecureChannelCredentials());
77 std::shared_ptr<TestChannel> test_channel =
78 std::make_shared<TestChannel>(channel);
79 // gRPC channel should be in idle state at this point but our test channel
80 // will return ready.
81 EXPECT_EQ(channel->GetState(false), GRPC_CHANNEL_IDLE);
82 EXPECT_EQ(test_channel->GetState(false), GRPC_CHANNEL_READY);
83 auto stub = grpc::testing::EchoTestService::NewStub(test_channel);
84 ClientContext ctx;
85 EchoRequest req;
86 req.set_message("Hello");
87 EchoResponse resp;
88 Status s = stub->Echo(&ctx, req, &resp);
89 EXPECT_EQ(s.ok(), true);
90 EXPECT_EQ(resp.message(), "Hello");
91 }
92
93 } // namespace
94 } // namespace testing
95 } // namespace grpc
96
main(int argc,char ** argv)97 int main(int argc, char** argv) {
98 grpc::testing::TestEnvironment env(argc, argv);
99 ::testing::InitGoogleTest(&argc, argv);
100 return RUN_ALL_TESTS();
101 }
102