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// Copyright (c) 2010 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 "base/basictypes.h"
#include "base/logging.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace logging {
namespace {
using ::testing::Return;
// Class to make sure any manipulations we do to the min log level are
// contained (i.e., do not affect other unit tests).
class MinLogLevelSaver {
public:
MinLogLevelSaver() : old_min_log_level_(GetMinLogLevel()) {}
~MinLogLevelSaver() { SetMinLogLevel(old_min_log_level_); }
private:
int old_min_log_level_;
DISALLOW_COPY_AND_ASSIGN(MinLogLevelSaver);
};
class LoggingTest : public testing::Test {
private:
MinLogLevelSaver min_log_level_saver_;
};
class MockLogSource {
public:
MOCK_METHOD0(Log, const char*());
};
TEST_F(LoggingTest, BasicLogging) {
MockLogSource mock_log_source;
const int kExpectedDebugOrReleaseCalls = 6;
const int kExpectedDebugCalls = 6;
const int kExpectedCalls =
kExpectedDebugOrReleaseCalls + (DEBUG_MODE ? kExpectedDebugCalls : 0);
EXPECT_CALL(mock_log_source, Log()).Times(kExpectedCalls).
WillRepeatedly(Return("log message"));
SetMinLogLevel(LOG_INFO);
EXPECT_TRUE(LOG_IS_ON(INFO));
EXPECT_EQ(DEBUG_MODE != 0, DLOG_IS_ON(INFO));
EXPECT_TRUE(VLOG_IS_ON(0));
LOG(INFO) << mock_log_source.Log();
LOG_IF(INFO, true) << mock_log_source.Log();
PLOG(INFO) << mock_log_source.Log();
PLOG_IF(INFO, true) << mock_log_source.Log();
VLOG(0) << mock_log_source.Log();
VLOG_IF(0, true) << mock_log_source.Log();
DLOG(INFO) << mock_log_source.Log();
DLOG_IF(INFO, true) << mock_log_source.Log();
DPLOG(INFO) << mock_log_source.Log();
DPLOG_IF(INFO, true) << mock_log_source.Log();
DVLOG(0) << mock_log_source.Log();
DVLOG_IF(0, true) << mock_log_source.Log();
}
TEST_F(LoggingTest, LoggingIsLazy) {
MockLogSource mock_log_source;
EXPECT_CALL(mock_log_source, Log()).Times(0);
SetMinLogLevel(LOG_WARNING);
EXPECT_FALSE(LOG_IS_ON(INFO));
EXPECT_FALSE(DLOG_IS_ON(INFO));
EXPECT_FALSE(VLOG_IS_ON(1));
LOG(INFO) << mock_log_source.Log();
LOG_IF(INFO, false) << mock_log_source.Log();
PLOG(INFO) << mock_log_source.Log();
PLOG_IF(INFO, false) << mock_log_source.Log();
VLOG(1) << mock_log_source.Log();
VLOG_IF(1, true) << mock_log_source.Log();
DLOG(INFO) << mock_log_source.Log();
DLOG_IF(INFO, true) << mock_log_source.Log();
DPLOG(INFO) << mock_log_source.Log();
DPLOG_IF(INFO, true) << mock_log_source.Log();
DVLOG(1) << mock_log_source.Log();
DVLOG_IF(1, true) << mock_log_source.Log();
}
TEST_F(LoggingTest, ChecksAreNotLazy) {
MockLogSource mock_log_source, uncalled_mock_log_source;
EXPECT_CALL(mock_log_source, Log()).Times(8).
WillRepeatedly(Return("check message"));
EXPECT_CALL(uncalled_mock_log_source, Log()).Times(0);
SetMinLogLevel(LOG_FATAL + 1);
EXPECT_FALSE(LOG_IS_ON(FATAL));
CHECK(mock_log_source.Log()) << uncalled_mock_log_source.Log();
PCHECK(!mock_log_source.Log()) << mock_log_source.Log();
CHECK_EQ(mock_log_source.Log(), mock_log_source.Log())
<< uncalled_mock_log_source.Log();
CHECK_NE(mock_log_source.Log(), mock_log_source.Log())
<< mock_log_source.Log();
}
TEST_F(LoggingTest, DebugLoggingReleaseBehavior) {
#if !defined(NDEBUG)
int debug_only_variable = 1;
#endif
// These should avoid emitting references to |debug_only_variable|
// in release mode.
DLOG_IF(INFO, debug_only_variable) << "test";
DLOG_ASSERT(debug_only_variable) << "test";
DPLOG_IF(INFO, debug_only_variable) << "test";
DVLOG_IF(1, debug_only_variable) << "test";
}
TEST_F(LoggingTest, DchecksAreLazy) {
MockLogSource mock_log_source;
EXPECT_CALL(mock_log_source, Log()).Times(0);
#if !defined(LOGGING_IS_OFFICIAL_BUILD) && defined(NDEBUG)
// Unofficial release build.
logging::g_enable_dcheck = false;
#else // !defined(LOGGING_IS_OFFICIAL_BUILD) && defined(NDEBUG)
SetMinLogLevel(LOG_FATAL + 1);
EXPECT_FALSE(LOG_IS_ON(FATAL));
#endif // !defined(LOGGING_IS_OFFICIAL_BUILD) && defined(NDEBUG)
DCHECK(mock_log_source.Log()) << mock_log_source.Log();
DPCHECK(mock_log_source.Log()) << mock_log_source.Log();
DCHECK_EQ(0, 0) << mock_log_source.Log();
DCHECK_EQ(mock_log_source.Log(), static_cast<const char*>(NULL))
<< mock_log_source.Log();
}
TEST_F(LoggingTest, DcheckReleaseBehavior) {
int some_variable = 1;
// These should still reference |some_variable| so we don't get
// unused variable warnings.
DCHECK(some_variable) << "test";
DPCHECK(some_variable) << "test";
DCHECK_EQ(some_variable, 1) << "test";
}
} // namespace
} // namespace logging
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