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// Copyright (c) 2011 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;
// Needs to be global since log assert handlers can't maintain state.
int log_sink_call_count = 0;
#if !defined(OFFICIAL_BUILD) || defined(DCHECK_ALWAYS_ON) || !defined(NDEBUG)
void LogSink(const std::string& str) {
++log_sink_call_count;
}
#endif
// Class to make sure any manipulations we do to the min log level are
// contained (i.e., do not affect other unit tests).
class LogStateSaver {
public:
LogStateSaver() : old_min_log_level_(GetMinLogLevel()) {}
~LogStateSaver() {
SetMinLogLevel(old_min_log_level_);
SetLogAssertHandler(NULL);
log_sink_call_count = 0;
}
private:
int old_min_log_level_;
DISALLOW_COPY_AND_ASSIGN(LogStateSaver);
};
class LoggingTest : public testing::Test {
private:
LogStateSaver log_state_saver_;
};
class MockLogSource {
public:
MOCK_METHOD0(Log, const char*());
};
TEST_F(LoggingTest, BasicLogging) {
MockLogSource mock_log_source;
EXPECT_CALL(mock_log_source, Log()).Times(DEBUG_MODE ? 16 : 8).
WillRepeatedly(Return("log message"));
SetMinLogLevel(LOG_INFO);
EXPECT_TRUE(LOG_IS_ON(INFO));
// As of g++-4.5, the first argument to EXPECT_EQ cannot be a
// constant expression.
const bool kIsDebugMode = (DEBUG_MODE != 0);
EXPECT_TRUE(kIsDebugMode == 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();
VPLOG(0) << mock_log_source.Log();
VPLOG_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();
DVPLOG(0) << mock_log_source.Log();
DVPLOG_IF(0, true) << mock_log_source.Log();
}
TEST_F(LoggingTest, LogIsOn) {
#if defined(NDEBUG)
const bool kDfatalIsFatal = false;
#else // defined(NDEBUG)
const bool kDfatalIsFatal = true;
#endif // defined(NDEBUG)
SetMinLogLevel(LOG_INFO);
EXPECT_TRUE(LOG_IS_ON(INFO));
EXPECT_TRUE(LOG_IS_ON(WARNING));
EXPECT_TRUE(LOG_IS_ON(ERROR));
EXPECT_TRUE(LOG_IS_ON(FATAL));
EXPECT_TRUE(LOG_IS_ON(DFATAL));
SetMinLogLevel(LOG_WARNING);
EXPECT_FALSE(LOG_IS_ON(INFO));
EXPECT_TRUE(LOG_IS_ON(WARNING));
EXPECT_TRUE(LOG_IS_ON(ERROR));
EXPECT_TRUE(LOG_IS_ON(FATAL));
EXPECT_TRUE(LOG_IS_ON(DFATAL));
SetMinLogLevel(LOG_ERROR);
EXPECT_FALSE(LOG_IS_ON(INFO));
EXPECT_FALSE(LOG_IS_ON(WARNING));
EXPECT_TRUE(LOG_IS_ON(ERROR));
EXPECT_TRUE(LOG_IS_ON(FATAL));
EXPECT_TRUE(LOG_IS_ON(DFATAL));
// LOG_IS_ON(FATAL) should always be true.
SetMinLogLevel(LOG_FATAL + 1);
EXPECT_FALSE(LOG_IS_ON(INFO));
EXPECT_FALSE(LOG_IS_ON(WARNING));
EXPECT_FALSE(LOG_IS_ON(ERROR));
EXPECT_TRUE(LOG_IS_ON(FATAL));
EXPECT_TRUE(kDfatalIsFatal == LOG_IS_ON(DFATAL));
}
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();
VPLOG(1) << mock_log_source.Log();
VPLOG_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();
DVPLOG(1) << mock_log_source.Log();
DVPLOG_IF(1, true) << mock_log_source.Log();
}
// Official builds have CHECKs directly call BreakDebugger.
#if !defined(OFFICIAL_BUILD)
TEST_F(LoggingTest, CheckStreamsAreLazy) {
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);
SetLogAssertHandler(&LogSink);
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();
}
#endif
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, DcheckStreamsAreLazy) {
MockLogSource mock_log_source;
EXPECT_CALL(mock_log_source, Log()).Times(0);
#if DCHECK_IS_ON
DCHECK(true) << mock_log_source.Log();
DCHECK_EQ(0, 0) << mock_log_source.Log();
#else
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();
#endif
}
TEST_F(LoggingTest, Dcheck) {
#if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON)
// Release build.
EXPECT_FALSE(DCHECK_IS_ON);
EXPECT_FALSE(DLOG_IS_ON(DCHECK));
#elif defined(NDEBUG) && defined(DCHECK_ALWAYS_ON)
// Release build with real DCHECKS.
SetLogAssertHandler(&LogSink);
EXPECT_TRUE(DCHECK_IS_ON);
EXPECT_FALSE(DLOG_IS_ON(DCHECK));
#else
// Debug build.
SetLogAssertHandler(&LogSink);
EXPECT_TRUE(DCHECK_IS_ON);
EXPECT_TRUE(DLOG_IS_ON(DCHECK));
#endif
EXPECT_EQ(0, log_sink_call_count);
DCHECK(false);
EXPECT_EQ(DCHECK_IS_ON ? 1 : 0, log_sink_call_count);
DPCHECK(false);
EXPECT_EQ(DCHECK_IS_ON ? 2 : 0, log_sink_call_count);
DCHECK_EQ(0, 1);
EXPECT_EQ(DCHECK_IS_ON ? 3 : 0, log_sink_call_count);
}
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";
}
// Test that defining an operator<< for a type in a namespace doesn't prevent
// other code in that namespace from calling the operator<<(ostream, wstring)
// defined by logging.h. This can fail if operator<<(ostream, wstring) can't be
// found by ADL, since defining another operator<< prevents name lookup from
// looking in the global namespace.
namespace nested_test {
class Streamable {};
ALLOW_UNUSED_TYPE std::ostream& operator<<(std::ostream& out,
const Streamable&) {
return out << "Streamable";
}
TEST_F(LoggingTest, StreamingWstringFindsCorrectOperator) {
std::wstring wstr = L"Hello World";
std::ostringstream ostr;
ostr << wstr;
EXPECT_EQ("Hello World", ostr.str());
}
} // namespace nested_test
} // namespace
} // namespace logging
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