forked from envoyproxy/envoy
-
Notifications
You must be signed in to change notification settings - Fork 0
/
logging.h
204 lines (183 loc) · 11.6 KB
/
logging.h
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
#pragma once
#include <cstdint>
#include <string>
#include <vector>
#include "source/common/common/logger.h"
#include "absl/strings/str_join.h"
#include "absl/strings/str_split.h"
#include "absl/synchronization/mutex.h"
#include "spdlog/spdlog.h"
namespace Envoy {
/**
* Provides a mechanism to temporarily set the logging level on
* construction, restoring its previous state on destruction.
*
* The log_level is the minimum log severity required to print messages.
* Messages below this loglevel will be suppressed.
*
* Note that during the scope of this object, command-line overrides, e.g.,
* --log-level trace, will not take effect.
*
* Also note: instantiating this setter should only occur when the system is
* in a quiescent state, e.g. at startup or between tests.
*
* This is intended for use in EXPECT_LOG_CONTAINS and similar macros.
*/
class LogLevelSetter {
public:
explicit LogLevelSetter(spdlog::level::level_enum log_level);
~LogLevelSetter();
private:
std::vector<spdlog::level::level_enum> previous_levels_;
FancyLogLevelMap previous_fancy_levels_;
};
/**
* Records log messages in a vector<string>, forwarding them to the previous
* delegate. This is useful for unit-testing log messages while still being able
* to see them on stderr.
*
* Also note: instantiating this sink should only occur when the system is
* in a quiescent state, e.g. at startup or between tests
*
* This is intended for use in EXPECT_LOG_CONTAINS and similar macros.
*/
class LogRecordingSink : public Logger::SinkDelegate {
public:
explicit LogRecordingSink(Logger::DelegatingLogSinkSharedPtr log_sink);
~LogRecordingSink() override;
// Logger::SinkDelegate
void log(absl::string_view msg) override;
void flush() override;
const std::vector<std::string> messages() const {
absl::MutexLock ml(&mtx_);
std::vector<std::string> copy(messages_);
return copy;
}
private:
mutable absl::Mutex mtx_;
std::vector<std::string> messages_ ABSL_GUARDED_BY(mtx_);
};
using StringPair = std::pair<std::string, std::string>;
using ExpectedLogMessages = std::vector<StringPair>;
// Below macros specify Envoy:: before class names so that the macro can be used outside of
// namespace Envoy.
// Alias for EXPECT_LOG_CONTAINS_ALL_OF_HELPER, with escaped=true
#define EXPECT_LOG_CONTAINS_ALL_OF_ESCAPED(expected_messages, stmt) \
EXPECT_LOG_CONTAINS_ALL_OF_HELPER(expected_messages, stmt, true)
// Alias for EXPECT_LOG_CONTAINS_ALL_OF_HELPER, with escaped=false
#define EXPECT_LOG_CONTAINS_ALL_OF(expected_messages, stmt) \
EXPECT_LOG_CONTAINS_ALL_OF_HELPER(expected_messages, stmt, false)
// Validates that when stmt is executed, log messages containing substr and loglevel will be
// emitted. Escaped=true sets the behavior to function like the --log-format-escaped CLI flag.
// Failure message e.g.,
//
// Logs:
// [2018-04-12 05:51:00.245][7290192][debug][upstream] grpc_mux_impl.cc:160] Received gRPC
// [2018-04-12 05:51:00.246][7290192][warning][upstream] grpc_mux_impl.cc:63] Called bar
// [2018-04-12 05:51:00.246][7290192][trace][upstream] grpc_mux_impl.cc:80] Sending foo
// Does NOT contain:
// 'warning', 'Too many sendDiscoveryRequest calls for baz’
// 'warning', 'Too man sendDiscoveryRequest calls for foo'
#define EXPECT_LOG_CONTAINS_ALL_OF_HELPER(expected_messages, stmt, escaped) \
do { \
ASSERT_FALSE(expected_messages.empty()) << "Expected messages cannot be empty."; \
Envoy::LogLevelSetter save_levels(spdlog::level::trace); \
Envoy::Logger::DelegatingLogSinkSharedPtr sink_ptr = Envoy::Logger::Registry::getSink(); \
sink_ptr->setShouldEscape(escaped); \
Envoy::LogRecordingSink log_recorder(sink_ptr); \
stmt; \
auto messages = log_recorder.messages(); \
if (messages.empty()) { \
FAIL() << "Expected message(s), but NONE was recorded."; \
} \
Envoy::ExpectedLogMessages failed_expectations; \
for (const Envoy::StringPair& expected : expected_messages) { \
const auto log_message = \
std::find_if(messages.begin(), messages.end(), [&expected](const std::string& message) { \
return (message.find(expected.second) != std::string::npos) && \
(message.find(expected.first) != std::string::npos); \
}); \
if (log_message == messages.end()) { \
failed_expectations.push_back(expected); \
} \
} \
if (!failed_expectations.empty()) { \
std::string failed_message; \
absl::StrAppend(&failed_message, "\nLogs:\n ", absl::StrJoin(messages, " "), \
"\n Do NOT contain:\n"); \
for (const auto& expectation : failed_expectations) { \
absl::StrAppend(&failed_message, " '", expectation.first, "', '", expectation.second, \
"'\n"); \
} \
FAIL() << failed_message; \
} \
} while (false)
// Validates that when stmt is executed, log message containing substr and loglevel will NOT be
// emitted. Failure message e.g.,
//
// Logs:
// [2018-04-12 05:51:00.245][7290192][warning][upstream] grpc_mux_impl.cc:160] Received gRPC
// [2018-04-12 05:51:00.246][7290192][trace][upstream] grpc_mux_impl.cc:63] Called bar
// Should NOT contain:
// 'warning', 'Received gRPC’
#define EXPECT_LOG_NOT_CONTAINS(loglevel, substr, stmt) \
do { \
Envoy::LogLevelSetter save_levels(spdlog::level::trace); \
Envoy::LogRecordingSink log_recorder(Envoy::Logger::Registry::getSink()); \
stmt; \
auto messages = log_recorder.messages(); \
for (const std::string& message : messages) { \
if ((message.find(substr) != std::string::npos) && \
(message.find(loglevel) != std::string::npos)) { \
FAIL() << "\nLogs:\n " << absl::StrJoin(messages, " ") << "\n Should NOT contain:\n '" \
<< loglevel << "', '" << substr "'\n"; \
} \
} \
} while (false)
// Validates that when stmt is executed, the supplied substring matches at least one log message.
// Failure message e.g.,
//
// Logs:
// [2018-04-12 05:51:00.245][7290192][debug][upstream] grpc_mux_impl.cc:160] Received gRPC
// [2018-04-12 05:51:00.246][7290192][trace][upstream] grpc_mux_impl.cc:80] Sending foo
// Do NOT contain:
// 'warning', 'Too many sendDiscoveryRequest calls for baz’
#define EXPECT_LOG_CONTAINS(loglevel, substr, stmt) \
do { \
const Envoy::ExpectedLogMessages message{{loglevel, substr}}; \
EXPECT_LOG_CONTAINS_ALL_OF(message, stmt); \
} while (false)
// Validates that when stmt is executed, the supplied substring occurs exactly the specified
// number of times.
#define EXPECT_LOG_CONTAINS_N_TIMES(loglevel, substr, expected_occurrences, stmt) \
do { \
Envoy::LogLevelSetter save_levels(spdlog::level::trace); \
Envoy::LogRecordingSink log_recorder(Envoy::Logger::Registry::getSink()); \
stmt; \
auto messages = log_recorder.messages(); \
uint64_t actual_occurrences = 0; \
for (const std::string& message : messages) { \
if ((message.find(substr) != std::string::npos) && \
(message.find(loglevel) != std::string::npos)) { \
actual_occurrences++; \
} \
} \
EXPECT_EQ(expected_occurrences, actual_occurrences); \
} while (false)
// Validates that when stmt is executed, no logs will be emitted.
// Expected equality of these values:
// 0
// logs.size()
// Which is: 3
// Logs:
// [2018-04-12 05:51:00.245][7290192][debug][upstream] grpc_mux_impl.cc:160] Received gRPC
// [2018-04-12 05:51:00.246][7290192][trace][upstream] grpc_mux_impl.cc:80] Sending foo
#define EXPECT_NO_LOGS(stmt) \
do { \
Envoy::LogLevelSetter save_levels(spdlog::level::trace); \
Envoy::LogRecordingSink log_recorder(Envoy::Logger::Registry::getSink()); \
stmt; \
const std::vector<std::string> logs = log_recorder.messages(); \
ASSERT_EQ(0, logs.size()) << " Logs:\n " << absl::StrJoin(logs, " "); \
} while (false)
} // namespace Envoy