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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/drive/event_logger.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace drive {
TEST(EventLoggerTest, BasicLogging) {
EventLogger logger;
logger.SetHistorySize(3); // At most 3 events are kept.
EXPECT_EQ(0U, logger.GetHistory().size());
logger.Log(logging::LOG_INFO, "first");
logger.Log(logging::LOG_INFO, "%dnd", 2);
logger.Log(logging::LOG_INFO, "third");
// Events are recorded in the chronological order with sequential IDs.
std::vector<EventLogger::Event> history = logger.GetHistory();
ASSERT_EQ(3U, history.size());
EXPECT_EQ(0, history[0].id);
EXPECT_EQ("first", history[0].what);
EXPECT_EQ(1, history[1].id);
EXPECT_EQ("2nd", history[1].what);
EXPECT_EQ(2, history[2].id);
EXPECT_EQ("third", history[2].what);
logger.Log(logging::LOG_INFO, "fourth");
// It does not log events beyond the specified.
history = logger.GetHistory();
ASSERT_EQ(3U, history.size());
// The oldest events is pushed out.
EXPECT_EQ(1, history[0].id);
EXPECT_EQ("2nd", history[0].what);
EXPECT_EQ(2, history[1].id);
EXPECT_EQ("third", history[1].what);
EXPECT_EQ(3, history[2].id);
EXPECT_EQ("fourth", history[2].what);
}
} // namespace drive
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