#include <gtest/gtest.h>

#include "sysmon/battery_monitor.hpp"

TEST(BatteryMonitorTest, NormalizesKnownStateSpellings) {

EXPECT_EQ(BatteryMonitor::normalize_state("Charging"), "Charging");

EXPECT_EQ(BatteryMonitor::normalize_state("discharging"), "Discharging");

EXPECT_EQ(BatteryMonitor::normalize_state(" Full "), "Full");

EXPECT_EQ(BatteryMonitor::normalize_state("Not charging"), "Not charging");

EXPECT_TRUE(BatteryMonitor::normalize_state("").empty());

}

TEST(BatteryMonitorTest, UnknownStatesArePreservedNotDiscarded) {

EXPECT_EQ(BatteryMonitor::normalize_state("Calibrating"), "Calibrating");

}

TEST(BatteryMonitorTest, ReadNeverReportsImpossibleValues) {

BatteryMonitor monitor;

const BatteryStats stats = monitor.read();

if (!stats.present) {

// A machine without a battery must not invent one.

EXPECT_FALSE(stats.percent.has_value());

EXPECT_FALSE(stats.cycle_count.has_value());

return;

}

if (stats.percent.has_value()) {

EXPECT_GE(stats.percent.value(), 0.0);

EXPECT_LE(stats.percent.value(), 100.0);

}

if (stats.health_percent.has_value()) {

// Health is full capacity over design capacity; a value near zero means

// the two were read in different units.

EXPECT_GT(stats.health_percent.value(), 5.0);

EXPECT_LE(stats.health_percent.value(), 200.0);

}

if (stats.temperature_celsius.has_value()) {

EXPECT_GT(stats.temperature_celsius.value(), -30.0);

EXPECT_LT(stats.temperature_celsius.value(), 100.0);

}

}