[chromeos] New PowerManagerClient observer to collect power data.

chromeos/power/power_data_collector_unittest.cc

+// Copyright (c) 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 "chromeos/power/power_data_collector.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/fake_dbus_thread_manager.h"
+#include "chromeos/dbus/power_manager/power_supply_properties.pb.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+class PowerDataCollectorTest : public testing::Test {
+ public:
+  PowerDataCollectorTest() : power_data_collector_(NULL) {}
+  virtual ~PowerDataCollectorTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    FakeDBusThreadManager* fake_dbus_thread_manager = new FakeDBusThreadManager;
+    fake_dbus_thread_manager->SetFakeClients();
+    DBusThreadManager::InitializeForTesting(fake_dbus_thread_manager);
+    PowerDataCollector::Initialize();
+    power_data_collector_ = PowerDataCollector::Get();
+  }
+
+  virtual void TearDown() OVERRIDE {
+    PowerDataCollector::Shutdown();
+    DBusThreadManager::Shutdown();
+    power_data_collector_ = NULL;
+  }
+
+ protected:
+  PowerDataCollector* power_data_collector_;
+};
+
+TEST_F(PowerDataCollectorTest, PowerChanged) {
+  power_manager::PowerSupplyProperties prop1, prop2;
+
+  prop1.set_external_power(power_manager::PowerSupplyProperties::DISCONNECTED);
+  prop1.set_battery_percent(20.00);
+
+  power_data_collector_->PowerChanged(prop1);
+  const std::vector<PowerDataCollector::PowerSupplySnapshot>& data1 =
+      power_data_collector_->power_supply_data();
+  ASSERT_EQ(static_cast<size_t>(1), data1.size());
+  EXPECT_DOUBLE_EQ(prop1.battery_percent(), data1[0].battery_percent);
+  EXPECT_FALSE(data1[0].external_power);
+
+  prop2.set_external_power(power_manager::PowerSupplyProperties::AC);
+  prop2.set_battery_percent(100.00);
+
+  power_data_collector_->PowerChanged(prop2);
+  const std::vector<PowerDataCollector::PowerSupplySnapshot>& data2 =
+      power_data_collector_->power_supply_data();
+  ASSERT_EQ(static_cast<size_t>(2), data2.size());
+  EXPECT_DOUBLE_EQ(prop2.battery_percent(), data1[1].battery_percent);
+  EXPECT_TRUE(data2[1].external_power);
+}
+
+}  // namespace chromeos