1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/drive/event_logger.h"
6
7#include "testing/gtest/include/gtest/gtest.h"
8
9namespace drive {
10
11TEST(EventLoggerTest, BasicLogging) {
12  EventLogger logger;
13  logger.SetHistorySize(3);  // At most 3 events are kept.
14  EXPECT_EQ(0U, logger.GetHistory().size());
15
16  logger.Log(logging::LOG_INFO, "first");
17  logger.Log(logging::LOG_INFO, "%dnd", 2);
18  logger.Log(logging::LOG_INFO, "third");
19
20  // Events are recorded in the chronological order with sequential IDs.
21  std::vector<EventLogger::Event> history = logger.GetHistory();
22  ASSERT_EQ(3U, history.size());
23  EXPECT_EQ(0, history[0].id);
24  EXPECT_EQ("first", history[0].what);
25  EXPECT_EQ(1, history[1].id);
26  EXPECT_EQ("2nd", history[1].what);
27  EXPECT_EQ(2, history[2].id);
28  EXPECT_EQ("third", history[2].what);
29
30  logger.Log(logging::LOG_INFO, "fourth");
31  // It does not log events beyond the specified.
32  history = logger.GetHistory();
33  ASSERT_EQ(3U, history.size());
34  // The oldest events is pushed out.
35  EXPECT_EQ(1, history[0].id);
36  EXPECT_EQ("2nd", history[0].what);
37  EXPECT_EQ(2, history[1].id);
38  EXPECT_EQ("third", history[1].what);
39  EXPECT_EQ(3, history[2].id);
40  EXPECT_EQ("fourth", history[2].what);
41}
42
43}   // namespace drive
44