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
|
// Copyright 2021 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "quiche/quic/core/quic_connection_context.h"
#include "quiche/quic/platform/api/quic_test.h"
#include "quiche/quic/platform/api/quic_thread.h"
using testing::ElementsAre;
namespace quic {
namespace {
class TraceCollector : public QuicConnectionTracer {
public:
~TraceCollector() override = default;
void PrintLiteral(const char* literal) override { trace_.push_back(literal); }
void PrintString(absl::string_view s) override {
trace_.push_back(std::string(s));
}
const std::vector<std::string>& trace() const { return trace_; }
private:
std::vector<std::string> trace_;
};
struct FakeConnection {
FakeConnection() { context.tracer = std::make_unique<TraceCollector>(); }
const std::vector<std::string>& trace() const {
return static_cast<const TraceCollector*>(context.tracer.get())->trace();
}
QuicConnectionContext context;
};
void SimpleSwitch() {
FakeConnection connection;
// These should be ignored since current context is nullptr.
EXPECT_EQ(QuicConnectionContext::Current(), nullptr);
QUIC_TRACELITERAL("before switch: literal");
QUIC_TRACESTRING(std::string("before switch: string"));
QUIC_TRACEPRINTF("%s: %s", "before switch", "printf");
{
QuicConnectionContextSwitcher switcher(&connection.context);
QUIC_TRACELITERAL("literal");
QUIC_TRACESTRING(std::string("string"));
QUIC_TRACEPRINTF("%s", "printf");
}
EXPECT_EQ(QuicConnectionContext::Current(), nullptr);
QUIC_TRACELITERAL("after switch: literal");
QUIC_TRACESTRING(std::string("after switch: string"));
QUIC_TRACEPRINTF("%s: %s", "after switch", "printf");
EXPECT_THAT(connection.trace(), ElementsAre("literal", "string", "printf"));
}
void NestedSwitch() {
FakeConnection outer, inner;
{
QuicConnectionContextSwitcher switcher(&outer.context);
QUIC_TRACELITERAL("outer literal 0");
QUIC_TRACESTRING(std::string("outer string 0"));
QUIC_TRACEPRINTF("%s %s %d", "outer", "printf", 0);
{
QuicConnectionContextSwitcher switcher(&inner.context);
QUIC_TRACELITERAL("inner literal");
QUIC_TRACESTRING(std::string("inner string"));
QUIC_TRACEPRINTF("%s %s", "inner", "printf");
}
QUIC_TRACELITERAL("outer literal 1");
QUIC_TRACESTRING(std::string("outer string 1"));
QUIC_TRACEPRINTF("%s %s %d", "outer", "printf", 1);
}
EXPECT_THAT(outer.trace(), ElementsAre("outer literal 0", "outer string 0",
"outer printf 0", "outer literal 1",
"outer string 1", "outer printf 1"));
EXPECT_THAT(inner.trace(),
ElementsAre("inner literal", "inner string", "inner printf"));
}
void AlternatingSwitch() {
FakeConnection zero, one, two;
for (int i = 0; i < 15; ++i) {
FakeConnection* connection =
((i % 3) == 0) ? &zero : (((i % 3) == 1) ? &one : &two);
QuicConnectionContextSwitcher switcher(&connection->context);
QUIC_TRACEPRINTF("%d", i);
}
EXPECT_THAT(zero.trace(), ElementsAre("0", "3", "6", "9", "12"));
EXPECT_THAT(one.trace(), ElementsAre("1", "4", "7", "10", "13"));
EXPECT_THAT(two.trace(), ElementsAre("2", "5", "8", "11", "14"));
}
typedef void (*ThreadFunction)();
template <ThreadFunction func>
class TestThread : public QuicThread {
public:
TestThread() : QuicThread("TestThread") {}
~TestThread() override = default;
protected:
void Run() override { func(); }
};
template <ThreadFunction func>
void RunInThreads(size_t n_threads) {
using ThreadType = TestThread<func>;
std::vector<ThreadType> threads(n_threads);
for (ThreadType& t : threads) {
t.Start();
}
for (ThreadType& t : threads) {
t.Join();
}
}
class QuicConnectionContextTest : public QuicTest {
protected:
};
TEST_F(QuicConnectionContextTest, NullTracerOK) {
FakeConnection connection;
std::unique_ptr<QuicConnectionTracer> tracer;
{
QuicConnectionContextSwitcher switcher(&connection.context);
QUIC_TRACELITERAL("msg 1 recorded");
}
connection.context.tracer.swap(tracer);
{
QuicConnectionContextSwitcher switcher(&connection.context);
// Should be a no-op since connection.context.tracer is nullptr.
QUIC_TRACELITERAL("msg 2 ignored");
}
EXPECT_THAT(static_cast<TraceCollector*>(tracer.get())->trace(),
ElementsAre("msg 1 recorded"));
}
TEST_F(QuicConnectionContextTest, TestSimpleSwitch) {
RunInThreads<SimpleSwitch>(10);
}
TEST_F(QuicConnectionContextTest, TestNestedSwitch) {
RunInThreads<NestedSwitch>(10);
}
TEST_F(QuicConnectionContextTest, TestAlternatingSwitch) {
RunInThreads<AlternatingSwitch>(10);
}
} // namespace
} // namespace quic
|
