ChromeOs Power Emulation Impl

chromeos/dbus/fake_power_manager_client_unittest.cc

+// Copyright 2015 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/fake_power_manager_client.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+class FakePowerManagerClientTest : public testing::Test {
+ public:
+  // These are based on the PowerSupplyProperties enums for BatteryState
+  // and ExternalPower.
+  enum BatteryState { FULL, CHARGING, DISCHARGING };

[Daniel Erat, 2015/07/06 14:28:15]

this will break; someone will update the proto's enums without updating these.
why not just use the enums from the .proto file?

[mozartalouis, 2015/07/06 20:49:42]

Done.

+  enum ExternalPower { AC, USB, DISCONNECTED };
+
+  FakePowerManagerClientTest() {
+    // Test the default values that are assigned when the
+    // FakePowerManagerClient::Init() is called.
+    client_.Init(nullptr);
+
+    EXPECT_EQ(50, client_.props().battery_percent());

[Daniel Erat, 2015/07/06 14:28:14]

putting expectations in the base class doesn't make sense; it means that these
will run over and over for every test case. it would be better to put these in a
separate test case.

but, i don't think that these expectations accomplish anything -- they're just
testing that the same constants are hardcoded in the implementation and in the
tests. please just remove these expectations.

[mozartalouis, 2015/07/06 20:49:42]

Done.

+    EXPECT_FALSE(client_.props().is_calculating_battery_time());
+    EXPECT_EQ(power_manager::PowerSupplyProperties_BatteryState_DISCHARGING,
+              client_.props().battery_state());
+    EXPECT_EQ(power_manager::PowerSupplyProperties_ExternalPower_DISCONNECTED,
+              client_.props().external_power());
+  }
+
+  void UpdatePowerProperties(int percentage,
+                             BatteryState state,
+                             ExternalPower power) {
+    client_.UpdatePowerProperties(
+        percentage, false,
+        static_cast<power_manager::PowerSupplyProperties_BatteryState>(state),
+        static_cast<power_manager::PowerSupplyProperties_ExternalPower>(power));
+  }
+
+  FakePowerManagerClient& client() { return client_; }

[Daniel Erat, 2015/07/06 14:28:15]

we don't use non-const references (but see below; this should just be deleted)

[mozartalouis, 2015/07/06 20:49:42]

Done.

+
+ private:
+  FakePowerManagerClient client_;

[Daniel Erat, 2015/07/06 14:28:15]

put this in a "protected:" section; then derived classes can use it without
needing to go through an accessor

[mozartalouis, 2015/07/06 20:49:42]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(FakePowerManagerClientTest);
+};
+
+TEST_F(FakePowerManagerClientTest, BatteryStateTest) {
+  // Test if setting battery_percent to 100 and battery_state to
+  // CHARGING will reset the battery_state to FULL.
+  UpdatePowerProperties(100, BatteryState::CHARGING, ExternalPower::AC);
+  EXPECT_EQ(100, client().props().battery_percent());
+  EXPECT_EQ(power_manager::PowerSupplyProperties_BatteryState_FULL,
+            client().props().battery_state());
+
+  // Test if setting battery_percent less than 100 and
+  // battery_state to FULL will reset battery_state to
+  // DISCHARGING.
+  UpdatePowerProperties(80, BatteryState::FULL, ExternalPower::DISCONNECTED);
+  EXPECT_EQ(80, client().props().battery_percent());
+  EXPECT_EQ(power_manager::PowerSupplyProperties_BatteryState_DISCHARGING,
+            client().props().battery_state());
+}
+
+TEST_F(FakePowerManagerClientTest, ExternalPowerTest) {
+  // Test if setting battery_percent less than 100 and
+  // battery_state to CHARGING while external_power is set to
+  // USB will set external_power to USB.
+  UpdatePowerProperties(80, BatteryState::CHARGING, ExternalPower::USB);
+  EXPECT_EQ(power_manager::PowerSupplyProperties_ExternalPower_USB,
+            client().props().external_power());
+
+  // Test if setting battery_percent less than 100 and
+  // battery_state to DISCHARGING while external_power is set to
+  // USB will set external_power to USB.
+  UpdatePowerProperties(80, BatteryState::DISCHARGING, ExternalPower::USB);
+  EXPECT_EQ(power_manager::PowerSupplyProperties_ExternalPower_USB,
+            client().props().external_power());
+
+  // Test if setting battery_percent less than 100 and
+  // battery_state to CHARGING while external_power is set to
+  // DISCONNECTED will set external_power to AC.
+  UpdatePowerProperties(80, BatteryState::CHARGING,
+                        ExternalPower::DISCONNECTED);
+  EXPECT_EQ(power_manager::PowerSupplyProperties_ExternalPower_AC,
+            client().props().external_power());
+
+  // Test if setting battery_percent less than 100 and
+  // battery_state to CHARGING while external_power is set to
+  // AC will set external_power to DISCONNECTED.
+  UpdatePowerProperties(80, BatteryState::DISCHARGING, ExternalPower::AC);
+  EXPECT_EQ(power_manager::PowerSupplyProperties_ExternalPower_DISCONNECTED,
+            client().props().external_power());
+}
+
+}  // namespace chromeos