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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/test/mock_log.h"
namespace base::test {
// static
MockLog* MockLog::g_instance_ = nullptr;
Lock MockLog::g_lock;
MockLog::MockLog() : is_capturing_logs_(false) {}
MockLog::~MockLog() {
if (is_capturing_logs_) {
StopCapturingLogs();
}
}
void MockLog::StartCapturingLogs() {
AutoLock scoped_lock(g_lock);
// We don't use CHECK(), which can generate a new LOG message, and
// thus can confuse MockLog objects or other registered
// LogSinks.
RAW_CHECK(!is_capturing_logs_);
RAW_CHECK(!g_instance_);
is_capturing_logs_ = true;
g_instance_ = this;
previous_handler_ = logging::GetLogMessageHandler();
logging::SetLogMessageHandler(LogMessageHandler);
}
void MockLog::StopCapturingLogs() {
AutoLock scoped_lock(g_lock);
// We don't use CHECK(), which can generate a new LOG message, and
// thus can confuse MockLog objects or other registered
// LogSinks.
RAW_CHECK(is_capturing_logs_);
RAW_CHECK(g_instance_ == this);
is_capturing_logs_ = false;
logging::SetLogMessageHandler(previous_handler_);
g_instance_ = nullptr;
}
// static
bool MockLog::LogMessageHandler(int severity,
const char* file,
int line,
size_t message_start,
const std::string& str) {
// gMock guarantees thread-safety for calling a mocked method
// (https://github.com/google/googlemock/blob/master/googlemock/docs/CookBook.md#using-google-mock-and-threads)
// but we also need to make sure that Start/StopCapturingLogs are synchronized
// with LogMessageHandler.
AutoLock scoped_lock(g_lock);
return g_instance_->Log(severity, file, line, message_start, str);
}
} // namespace base::test
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