Performance Monitor Database

chrome/browser/performance_monitor/database_unittest.cc

+// Copyright (c) 2010 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 <string>
+#include <vector>
+
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time.h"
+#include "chrome/browser/performance_monitor/database.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace performance_monitor {
+
+// A clock that increments every access. Great for testing.
+class TestingClock : public Database::Clock {
+ public:
+  TestingClock()
+      : counter_(0) {
+  }
+  explicit TestingClock(const TestingClock& other)
+      : counter_(other.counter_) {
+  }
+  virtual ~TestingClock() {}
+  base::Time GetTime() {
+    return base::Time::FromInternalValue(counter_++);
+  }
+ private:
+  int64 counter_;
+};
+
+////// PerformanceMonitorDatabaseSetupTests ////////////////////////////////////
+TEST(PerformanceMonitorDatabaseSetupTest, OpenCloseTest) {
+  FilePath alternate_path;
+  file_util::CreateNewTempDirectory(std::string(), &alternate_path);
+  scoped_refptr<Database> db = Database::Create(alternate_path);
+  ASSERT_TRUE(db);
+  ASSERT_TRUE(db->Close());
+}
+
+TEST(PerformanceMonitorDatabaseSetupTest, ActiveIntervalTest) {
+  FilePath alternate_path;
+  file_util::CreateNewTempDirectory(std::string(), &alternate_path);
+  TestingClock* clock_1 = new TestingClock();
+  base::Time start_time = clock_1->GetTime();
+
+  scoped_refptr<Database> db_1 = Database::Create(alternate_path);
+  db_1->set_clock(scoped_ptr<Database::Clock>(clock_1));
+  ASSERT_TRUE(db_1);
+  ASSERT_TRUE(db_1->Close());
+
+  TestingClock* clock_2 = new TestingClock(*clock_1);
+  base::Time mid_time = clock_2->GetTime();
+  scoped_refptr<Database> db_2 = Database::Create(alternate_path);
+  db_2->set_clock(scoped_ptr<Database::Clock>(clock_2));
+  ASSERT_TRUE(db_2);
+  ASSERT_TRUE(db_2->Close());
+
+  TestingClock* clock_3 = new TestingClock(*clock_2);
+  base::Time end_time = clock_3->GetTime();
+  scoped_refptr<Database> db_3 = Database::Create(alternate_path);
+  db_3->set_clock(scoped_ptr<Database::Clock>(clock_3));
+  ASSERT_TRUE(db_3);
+
+  std::vector<TimeRange> active_interval = db_3->GetActiveInterval(start_time,
+                                                                   end_time);
+  ASSERT_EQ(active_interval.size(), static_cast<size_t>(2));
+  ASSERT_TRUE(active_interval[0].start > start_time &&
+              active_interval[0].end < mid_time);
+  ASSERT_TRUE(active_interval[1].start > mid_time &&
+              active_interval[1].end < end_time);
+}
+}  // namespace performance_monitor