// Copyright 2013 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 "chrome/browser/sync_file_system/logger.h"
#include "testing/gtest/include/gtest/gtest.h"

using google_apis::EventLogger;

namespace sync_file_system {

namespace {

// Logs one event at each supported LogSeverity level.
void LogSampleEvents() {
  util::Log(logging::LOG_INFO, FROM_HERE, "Info test message");
  util::Log(logging::LOG_WARNING, FROM_HERE, "Warning test message");
  util::Log(logging::LOG_ERROR, FROM_HERE, "Error test message");
}

bool ContainsString(std::string contains_string, EventLogger::Event event) {
  return event.what.find(contains_string) != std::string::npos;
}

}  // namespace

class LoggerTest : public testing::Test {
 public:
  LoggerTest() {}

  virtual void SetUp() OVERRIDE {
    logging::SetMinLogLevel(logging::LOG_INFO);
    util::ClearLog();
  }

 protected:
  DISALLOW_COPY_AND_ASSIGN(LoggerTest);
};

TEST_F(LoggerTest, TestLogSeverityLevels) {
  // Check that all messages are logged when log LogSeverity is set to INFO.
  logging::SetMinLogLevel(logging::LOG_INFO);
  LogSampleEvents();

  const std::vector<EventLogger::Event> log = util::GetLogHistory();
  ASSERT_EQ(3u, log.size());
  EXPECT_TRUE(ContainsString("Info test message", log[0]));
  EXPECT_TRUE(ContainsString("Warning test message", log[1]));
  EXPECT_TRUE(ContainsString("Error test message", log[2]));
}

TEST_F(LoggerTest, TestMinSeverityLevel) {
  // Check that all messages are logged when log LogSeverity is set to ERROR.
  logging::SetMinLogLevel(logging::LOG_ERROR);
  LogSampleEvents();

  const std::vector<EventLogger::Event> log = util::GetLogHistory();
  ASSERT_EQ(1u, log.size());
  EXPECT_TRUE(ContainsString("Error test message", log[0]));
}

TEST_F(LoggerTest, TestClearLog) {
  LogSampleEvents();
  EXPECT_EQ(3u, util::GetLogHistory().size());

  util::ClearLog();
  EXPECT_EQ(0u, util::GetLogHistory().size());
}


}  // namespace sync_file_system