[chromeos] New PowerManagerClient observer to collect power data.

chromeos/dbus/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/dbus/power_data_collector.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "chromeos/dbus/fake_power_manager_client.h"
+#include "chromeos/dbus/power_manager/power_supply_properties.pb.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+class PowerDataCollectorTest : public testing::Test {
+ public:
+  PowerDataCollectorTest() {}
+  virtual ~PowerDataCollectorTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    power_data_collector_.reset(new PowerDataCollector(&fake_pm_client_));
+  }
+
+  virtual void TearDown() OVERRIDE {
+    power_data_collector_.reset();
+  }
+
+ protected:
+  FakePowerManagerClient fake_pm_client_;
+  scoped_ptr<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);
+  std::vector<PowerDataCollector::PowerSupplySnapshot>* data =
+      power_data_collector_->GetPowerSupplyData();
+  int data_size = data->size();
+  EXPECT_EQ(1, data_size);
+  EXPECT_EQ(20.00, (*data)[0].battery_charge);
+  EXPECT_FALSE((*data)[0].external_power);
+
+  prop2.set_external_power(power_manager::PowerSupplyProperties::AC);
+  prop2.set_battery_percent(100.00);
+
+  power_data_collector_->PowerChanged(prop2);
+  data = power_data_collector_->GetPowerSupplyData();
+  data_size = data->size();
+  EXPECT_EQ(2, data_size);
+  EXPECT_EQ(100.00, (*data)[1].battery_charge);
+  EXPECT_TRUE((*data)[1].external_power);
+}
+
+}  // namespace chromeos