[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/dbus/power_data_collector.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 {
+    PowerDataCollector::InitializeTesting();
+  }
+
+  virtual void TearDown() OVERRIDE {
+    PowerDataCollector::Shutdown();
+  }
+};
+
+TEST_F(PowerDataCollectorTest, PowerChanged) {
+  power_manager::PowerSupplyProperties prop1, prop2;
+  PowerDataCollector* power_data_collector = PowerDataCollector::Get();
+
+  prop1.set_external_power(power_manager::PowerSupplyProperties::DISCONNECTED);
+  prop1.set_battery_percent(20.00);
+
+  power_data_collector->PowerChanged(prop1);
+  std::vector<PowerDataCollector::PowerSupplySnapshot>& data1 =
+      power_data_collector->GetPowerSupplyData();
+  int data_size = data1->size();
+  EXPECT_EQ(1, data_size);
+  EXPECT_EQ(20.00, data1[0].battery_charge);
+  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);
+  std::vector<PowerDataCollector::PowerSupplySnapshot>& data2 =
+      power_data_collector->GetPowerSupplyData();
+  data_size = data2.size();
+  EXPECT_EQ(2, data_size);
+  EXPECT_EQ(100.00, data2[1].battery_charge);
+  EXPECT_TRUE(data2[1].external_power);
+}
+
+}  // namespace chromeos