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// Copyright 2014 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 "device/battery/battery_status_service.h"
#include <utility>
#include "base/bind.h"
#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "device/battery/battery_status_manager.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace device {
namespace {
class FakeBatteryManager : public BatteryStatusManager {
public:
explicit FakeBatteryManager(
const BatteryStatusService::BatteryUpdateCallback& callback)
: callback_(callback), start_invoked_count_(0), stop_invoked_count_(0) {}
~FakeBatteryManager() override {}
// Methods from Battery Status Manager
bool StartListeningBatteryChange() override {
start_invoked_count_++;
return true;
}
void StopListeningBatteryChange() override { stop_invoked_count_++; }
void InvokeUpdateCallback(const BatteryStatus& status) {
callback_.Run(status);
}
int start_invoked_count() const { return start_invoked_count_; }
int stop_invoked_count() const { return stop_invoked_count_; }
private:
BatteryStatusService::BatteryUpdateCallback callback_;
int start_invoked_count_;
int stop_invoked_count_;
DISALLOW_COPY_AND_ASSIGN(FakeBatteryManager);
};
} // namespace
class BatteryStatusServiceTest : public testing::Test {
public:
BatteryStatusServiceTest()
: battery_manager_(nullptr),
callback1_invoked_count_(0),
callback2_invoked_count_(0) {}
~BatteryStatusServiceTest() override {}
protected:
typedef BatteryStatusService::BatteryUpdateSubscription BatterySubscription;
void SetUp() override {
callback1_ = base::Bind(&BatteryStatusServiceTest::Callback1,
base::Unretained(this));
callback2_ = base::Bind(&BatteryStatusServiceTest::Callback2,
base::Unretained(this));
// We keep a raw pointer to the FakeBatteryManager, which we expect to
// remain valid for the lifetime of the BatteryStatusService.
scoped_ptr<FakeBatteryManager> battery_manager(
new FakeBatteryManager(battery_service_.GetUpdateCallbackForTesting()));
battery_manager_ = battery_manager.get();
battery_service_.SetBatteryManagerForTesting(std::move(battery_manager));
}
void TearDown() override {
base::RunLoop().RunUntilIdle();
}
FakeBatteryManager* battery_manager() {
return battery_manager_;
}
scoped_ptr<BatterySubscription> AddCallback(
const BatteryStatusService::BatteryUpdateCallback& callback) {
return battery_service_.AddCallback(callback);
}
int callback1_invoked_count() const {
return callback1_invoked_count_;
}
int callback2_invoked_count() const {
return callback2_invoked_count_;
}
const BatteryStatus& battery_status() const {
return battery_status_;
}
const BatteryStatusService::BatteryUpdateCallback& callback1() const {
return callback1_;
}
const BatteryStatusService::BatteryUpdateCallback& callback2() const {
return callback2_;
}
private:
void Callback1(const BatteryStatus& status) {
callback1_invoked_count_++;
battery_status_ = status;
}
void Callback2(const BatteryStatus& status) {
callback2_invoked_count_++;
battery_status_ = status;
}
base::MessageLoop message_loop_;
BatteryStatusService battery_service_;
FakeBatteryManager* battery_manager_;
BatteryStatusService::BatteryUpdateCallback callback1_;
BatteryStatusService::BatteryUpdateCallback callback2_;
int callback1_invoked_count_;
int callback2_invoked_count_;
BatteryStatus battery_status_;
DISALLOW_COPY_AND_ASSIGN(BatteryStatusServiceTest);
};
TEST_F(BatteryStatusServiceTest, AddFirstCallback) {
scoped_ptr<BatterySubscription> subscription1 = AddCallback(callback1());
EXPECT_EQ(1, battery_manager()->start_invoked_count());
EXPECT_EQ(0, battery_manager()->stop_invoked_count());
subscription1.reset();
EXPECT_EQ(1, battery_manager()->start_invoked_count());
EXPECT_EQ(1, battery_manager()->stop_invoked_count());
}
TEST_F(BatteryStatusServiceTest, AddCallbackAfterUpdate) {
scoped_ptr<BatterySubscription> subscription1 = AddCallback(callback1());
BatteryStatus status;
battery_manager()->InvokeUpdateCallback(status);
base::RunLoop().RunUntilIdle();
EXPECT_EQ(1, callback1_invoked_count());
EXPECT_EQ(0, callback2_invoked_count());
scoped_ptr<BatterySubscription> subscription2 = AddCallback(callback2());
EXPECT_EQ(1, callback1_invoked_count());
EXPECT_EQ(1, callback2_invoked_count());
}
TEST_F(BatteryStatusServiceTest, TwoCallbacksUpdate) {
scoped_ptr<BatterySubscription> subscription1 = AddCallback(callback1());
scoped_ptr<BatterySubscription> subscription2 = AddCallback(callback2());
BatteryStatus status;
status.charging = true;
status.charging_time = 100;
status.discharging_time = 200;
status.level = 0.5;
battery_manager()->InvokeUpdateCallback(status);
base::RunLoop().RunUntilIdle();
EXPECT_EQ(1, callback1_invoked_count());
EXPECT_EQ(1, callback2_invoked_count());
EXPECT_EQ(status.charging, battery_status().charging);
EXPECT_EQ(status.charging_time, battery_status().charging_time);
EXPECT_EQ(status.discharging_time, battery_status().discharging_time);
EXPECT_EQ(status.level, battery_status().level);
}
TEST_F(BatteryStatusServiceTest, RemoveOneCallback) {
scoped_ptr<BatterySubscription> subscription1 = AddCallback(callback1());
scoped_ptr<BatterySubscription> subscription2 = AddCallback(callback2());
BatteryStatus status;
battery_manager()->InvokeUpdateCallback(status);
base::RunLoop().RunUntilIdle();
EXPECT_EQ(1, callback1_invoked_count());
EXPECT_EQ(1, callback2_invoked_count());
subscription1.reset();
battery_manager()->InvokeUpdateCallback(status);
base::RunLoop().RunUntilIdle();
EXPECT_EQ(1, callback1_invoked_count());
EXPECT_EQ(2, callback2_invoked_count());
}
} // namespace device
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