1 //
2 //
3 // Copyright 2015 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 <gtest/gtest.h>
20
21 #include "absl/memory/memory.h"
22
23 #include <grpc/grpc.h>
24 #include <grpc/support/log.h>
25 #include <grpc/support/time.h>
26 #include <grpcpp/channel.h>
27 #include <grpcpp/client_context.h>
28 #include <grpcpp/create_channel.h>
29 #include <grpcpp/server.h>
30 #include <grpcpp/server_builder.h>
31 #include <grpcpp/server_context.h>
32
33 #include "src/core/lib/gprpp/crash.h"
34 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
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/util/subprocess.h"
39
40 static std::string g_root;
41
42 namespace grpc {
43 namespace testing {
44
45 namespace {
46
47 class CrashTest : public ::testing::Test {
48 protected:
CrashTest()49 CrashTest() {}
50
CreateServerAndStub()51 std::unique_ptr<grpc::testing::EchoTestService::Stub> CreateServerAndStub() {
52 auto port = grpc_pick_unused_port_or_die();
53 std::ostringstream addr_stream;
54 addr_stream << "localhost:" << port;
55 auto addr = addr_stream.str();
56 server_ = std::make_unique<SubProcess>(std::vector<std::string>({
57 g_root + "/client_crash_test_server",
58 "--address=" + addr,
59 }));
60 GPR_ASSERT(server_);
61 return grpc::testing::EchoTestService::NewStub(
62 grpc::CreateChannel(addr, InsecureChannelCredentials()));
63 }
64
KillServer()65 void KillServer() { server_.reset(); }
66
67 private:
68 std::unique_ptr<SubProcess> server_;
69 };
70
TEST_F(CrashTest,KillBeforeWrite)71 TEST_F(CrashTest, KillBeforeWrite) {
72 auto stub = CreateServerAndStub();
73
74 EchoRequest request;
75 EchoResponse response;
76 ClientContext context;
77 context.set_wait_for_ready(true);
78
79 auto stream = stub->BidiStream(&context);
80
81 request.set_message("Hello");
82 EXPECT_TRUE(stream->Write(request));
83 EXPECT_TRUE(stream->Read(&response));
84 EXPECT_EQ(response.message(), request.message());
85
86 KillServer();
87
88 request.set_message("You should be dead");
89 // This may succeed or fail depending on the state of the TCP connection
90 stream->Write(request);
91 // But the read will definitely fail
92 EXPECT_FALSE(stream->Read(&response));
93
94 EXPECT_FALSE(stream->Finish().ok());
95 }
96
TEST_F(CrashTest,KillAfterWrite)97 TEST_F(CrashTest, KillAfterWrite) {
98 auto stub = CreateServerAndStub();
99
100 EchoRequest request;
101 EchoResponse response;
102 ClientContext context;
103 context.set_wait_for_ready(true);
104
105 auto stream = stub->BidiStream(&context);
106
107 request.set_message("Hello");
108 EXPECT_TRUE(stream->Write(request));
109 EXPECT_TRUE(stream->Read(&response));
110 EXPECT_EQ(response.message(), request.message());
111
112 request.set_message("I'm going to kill you");
113 EXPECT_TRUE(stream->Write(request));
114
115 KillServer();
116
117 // This may succeed or fail depending on how quick the server was
118 stream->Read(&response);
119
120 EXPECT_FALSE(stream->Finish().ok());
121 }
122
123 } // namespace
124
125 } // namespace testing
126 } // namespace grpc
127
main(int argc,char ** argv)128 int main(int argc, char** argv) {
129 std::string me = argv[0];
130 auto lslash = me.rfind('/');
131 if (lslash != std::string::npos) {
132 g_root = me.substr(0, lslash);
133 } else {
134 g_root = ".";
135 }
136
137 grpc::testing::TestEnvironment env(&argc, argv);
138 ::testing::InitGoogleTest(&argc, argv);
139 // Order seems to matter on these tests: run three times to eliminate that
140 for (int i = 0; i < 3; i++) {
141 if (RUN_ALL_TESTS() != 0) {
142 return 1;
143 }
144 }
145 return 0;
146 }
147