1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
// Tests socket functionality using loopback connections. The UDP tests assume that no packets are
// lost, which should be the case for loopback communication, but is not guaranteed.
//
// Also tests our SocketMock class to make sure it works as expected and reports errors properly
// if the mock expectations aren't met during a test.
#include "socket.h"
#include "socket_mock.h"
#include <gtest/gtest.h>
#include <gtest/gtest-spi.h>
enum { kTestTimeoutMs = 3000 };
// Creates connected sockets |server| and |client|. Returns true on success.
bool MakeConnectedSockets(Socket::Protocol protocol, std::unique_ptr<Socket>* server,
std::unique_ptr<Socket>* client,
const std::string hostname = "localhost") {
*server = Socket::NewServer(protocol, 0);
if (*server == nullptr) {
ADD_FAILURE() << "Failed to create server.";
return false;
}
*client = Socket::NewClient(protocol, hostname, (*server)->GetLocalPort(), nullptr);
if (*client == nullptr) {
ADD_FAILURE() << "Failed to create client.";
return false;
}
// TCP passes the client off to a new socket.
if (protocol == Socket::Protocol::kTcp) {
*server = (*server)->Accept();
if (*server == nullptr) {
ADD_FAILURE() << "Failed to accept client connection.";
return false;
}
}
return true;
}
// Sends a string over a Socket. Returns true if the full string (without terminating char)
// was sent.
static bool SendString(Socket* sock, const std::string& message) {
return sock->Send(message.c_str(), message.length()) == static_cast<ssize_t>(message.length());
}
// Receives a string from a Socket. Returns true if the full string (without terminating char)
// was received.
static bool ReceiveString(Socket* sock, const std::string& message) {
std::string received(message.length(), '\0');
ssize_t bytes = sock->ReceiveAll(&received[0], received.length(), kTestTimeoutMs);
return static_cast<size_t>(bytes) == received.length() && received == message;
}
// Tests sending packets client -> server, then server -> client.
TEST(SocketTest, TestSendAndReceive) {
std::unique_ptr<Socket> server, client;
for (Socket::Protocol protocol : {Socket::Protocol::kUdp, Socket::Protocol::kTcp}) {
ASSERT_TRUE(MakeConnectedSockets(protocol, &server, &client));
EXPECT_TRUE(SendString(client.get(), "foo"));
EXPECT_TRUE(ReceiveString(server.get(), "foo"));
EXPECT_TRUE(SendString(server.get(), "bar baz"));
EXPECT_TRUE(ReceiveString(client.get(), "bar baz"));
}
}
// Tests sending and receiving large packets.
TEST(SocketTest, TestLargePackets) {
std::string message(1024, '\0');
std::unique_ptr<Socket> server, client;
for (Socket::Protocol protocol : {Socket::Protocol::kUdp, Socket::Protocol::kTcp}) {
ASSERT_TRUE(MakeConnectedSockets(protocol, &server, &client));
// Run through the test a few times.
for (int i = 0; i < 10; ++i) {
// Use a different message each iteration to prevent false positives.
for (size_t j = 0; j < message.length(); ++j) {
message[j] = static_cast<char>(i + j);
}
EXPECT_TRUE(SendString(client.get(), message));
EXPECT_TRUE(ReceiveString(server.get(), message));
}
}
}
// Tests UDP receive overflow when the UDP packet is larger than the receive buffer.
TEST(SocketTest, TestUdpReceiveOverflow) {
std::unique_ptr<Socket> server, client;
ASSERT_TRUE(MakeConnectedSockets(Socket::Protocol::kUdp, &server, &client));
EXPECT_TRUE(SendString(client.get(), "1234567890"));
// This behaves differently on different systems, either truncating the packet or returning -1.
char buffer[5];
ssize_t bytes = server->Receive(buffer, 5, kTestTimeoutMs);
if (bytes == 5) {
EXPECT_EQ(0, memcmp(buffer, "12345", 5));
} else {
EXPECT_EQ(-1, bytes);
}
}
TEST(SocketMockTest, TestSendSuccess) {
SocketMock mock;
mock.ExpectSend("foo");
EXPECT_TRUE(SendString(&mock, "foo"));
mock.ExpectSend("abc");
mock.ExpectSend("123");
EXPECT_TRUE(SendString(&mock, "abc"));
EXPECT_TRUE(SendString(&mock, "123"));
}
TEST(SocketMockTest, TestSendFailure) {
SocketMock* mock = new SocketMock;
EXPECT_NONFATAL_FAILURE(SendString(mock, "foo"), "no message was expected");
mock->ExpectSend("foo");
EXPECT_NONFATAL_FAILURE(SendString(mock, "bar"), "expected foo, but got bar");
EXPECT_TRUE(SendString(mock, "foo"));
mock->AddReceive("foo");
EXPECT_NONFATAL_FAILURE(SendString(mock, "foo"), "called out-of-order");
EXPECT_TRUE(ReceiveString(mock, "foo"));
mock->ExpectSend("foo");
EXPECT_NONFATAL_FAILURE(delete mock, "1 event(s) were not handled");
}
TEST(SocketMockTest, TestReceiveSuccess) {
SocketMock mock;
mock.AddReceive("foo");
EXPECT_TRUE(ReceiveString(&mock, "foo"));
mock.AddReceive("abc");
mock.AddReceive("123");
EXPECT_TRUE(ReceiveString(&mock, "abc"));
EXPECT_TRUE(ReceiveString(&mock, "123"));
}
TEST(SocketMockTest, TestReceiveFailure) {
SocketMock* mock = new SocketMock;
EXPECT_NONFATAL_FAILURE(ReceiveString(mock, "foo"), "no message was ready");
mock->ExpectSend("foo");
EXPECT_NONFATAL_FAILURE(ReceiveString(mock, "foo"), "called out-of-order");
EXPECT_TRUE(SendString(mock, "foo"));
char c;
mock->AddReceive("foo");
EXPECT_NONFATAL_FAILURE(mock->Receive(&c, 1, 0), "not enough bytes (1) for foo");
EXPECT_TRUE(ReceiveString(mock, "foo"));
mock->AddReceive("foo");
EXPECT_NONFATAL_FAILURE(delete mock, "1 event(s) were not handled");
}
TEST(SocketMockTest, TestAcceptSuccess) {
SocketMock mock;
SocketMock* mock_handler = new SocketMock;
mock.AddAccept(std::unique_ptr<SocketMock>(mock_handler));
EXPECT_EQ(mock_handler, mock.Accept().get());
mock.AddAccept(nullptr);
EXPECT_EQ(nullptr, mock.Accept().get());
}
TEST(SocketMockTest, TestAcceptFailure) {
SocketMock* mock = new SocketMock;
EXPECT_NONFATAL_FAILURE(mock->Accept(), "no socket was ready");
mock->ExpectSend("foo");
EXPECT_NONFATAL_FAILURE(mock->Accept(), "called out-of-order");
EXPECT_TRUE(SendString(mock, "foo"));
mock->AddAccept(nullptr);
EXPECT_NONFATAL_FAILURE(delete mock, "1 event(s) were not handled");
}
|
