blob: 48079c17b5950e264535b36e52c77e079ca2dbef [file] [log] [blame] [edit]
// Copyright 2019 The Chromium OS 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 "power_manager/common/battery_percentage_converter.h"
#include <cmath>
#include <base/macros.h>
#include <gtest/gtest.h>
#include "power_manager/common/power_constants.h"
namespace power_manager {
namespace {
constexpr double kLowBatteryShutdownPercent = 4.0;
constexpr double kFullFactor = 0.97;
class BatteryPercentageConverterTest : public ::testing::Test {
public:
BatteryPercentageConverterTest() = default;
BatteryPercentageConverterTest(const BatteryPercentageConverterTest&) =
delete;
BatteryPercentageConverterTest& operator=(
const BatteryPercentageConverterTest&) = delete;
protected:
BatteryPercentageConverter converter_{kLowBatteryShutdownPercent,
kFullFactor};
};
} // namespace
// Tests that |ConvertActualToDisplay| is the partially inverse function of
// |ConvertDisplayToActual|.
TEST_F(BatteryPercentageConverterTest,
ConvertActualToDisplayIsPartiallyInverse) {
constexpr double kActual = 86.0;
constexpr double kExpectedDisplay =
100.0 * (kActual - kLowBatteryShutdownPercent) /
(100 * kFullFactor - kLowBatteryShutdownPercent);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(kActual),
kExpectedDisplay);
EXPECT_DOUBLE_EQ(converter_.ConvertDisplayToActual(kExpectedDisplay),
kActual);
}
// Tests that |ConvertActualToDisplay| is the not inverse function of
// |ConvertDisplayToActual|.
TEST_F(BatteryPercentageConverterTest, ConvertActualToDisplayIsNotInverse) {
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(0.0), 0.0);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(1.0), 0.0);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(2.0), 0.0);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(3.0), 0.0);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(4.0), 0.0);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(97.0), 100.0);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(98.0), 100.0);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(99.0), 100.0);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(100.0), 100.0);
}
// Tests that |ConvertDisplayToActual| is the inverse function of
// |ConvertActualToDisplay|.
TEST_F(BatteryPercentageConverterTest, ConvertDisplayToActualIsInverse) {
constexpr double kDisplay = 88.0;
constexpr double kExpectedActual =
kFullFactor * kDisplay + kLowBatteryShutdownPercent -
kDisplay * kLowBatteryShutdownPercent / 100.0;
EXPECT_DOUBLE_EQ(converter_.ConvertDisplayToActual(kDisplay),
kExpectedActual);
EXPECT_DOUBLE_EQ(converter_.ConvertActualToDisplay(kExpectedActual),
kDisplay);
}
} // namespace power_manager