#include <gtest/gtest.h>
#define private public
#include "DCBattery.hh"

TEST( BatteryTest , one ) {
    // Attempt to create an Battery
    DCBattery * battery;
    battery = new DCBattery(9.0, 2.0);
    EXPECT_NE( (void*)0, battery);
    //delete battery;
}

TEST( BatteryTest , two ) {
    // Test Ideal Voltage
    DCBattery battery(9.0, 2.0);
    EXPECT_DOUBLE_EQ( 9.0, battery.idealVoltage );

}

TEST( BatteryTest , three ) {
    // Test Internal Resistance
    DCBattery battery(9.0, 2.0);
    EXPECT_DOUBLE_EQ( 2, battery.internalResistance );

}

TEST( BatteryTest , four ) {
    // Test Actual Voltage doesnt go below zero
    DCBattery battery(9.0, 2.0);
    battery.setCurrent(6.0);
    battery.update ();
    EXPECT_DOUBLE_EQ( 0.0, battery.actualVoltage );

}

TEST( BatteryTest , five ) {
    // Test Actual Voltage under normal load
    DCBattery battery(9.0, 2.0);
    battery.setCurrent(4.0);
    battery.update ();
    EXPECT_DOUBLE_EQ( 1.0, battery.actualVoltage );

}

TEST( BatteryTest , six ) {
    // Test Actual Voltage doesnt go above Ideal Voltage
    DCBattery battery(9.0, 2.0);
    battery.setCurrent(-4.0);
    battery.update ();
    EXPECT_DOUBLE_EQ( 9.0, battery.actualVoltage );

}