package carTrip;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class CarTest {

    private static final String MODEL = "Audi";
    private static final String EMPTY_STRING = "";
    private static final int INIT_FUEL_AMOUNT = 15;
    private static final int INIT_FUEL_CONSUMPTION_PER_KM = 10;
    private static final int INIT_TANK_CAPACITY = 20;

    private Car car;


    @Before
    public void createCar() {
        car = new Car(MODEL, INIT_TANK_CAPACITY, INIT_FUEL_AMOUNT, INIT_FUEL_CONSUMPTION_PER_KM);
    }

    @Test
    public void testGetModelFunctionality() {
        Assert.assertTrue("Car doesn't return the right model!", car.getModel().equals(MODEL));
    }

    @Test
    public void testSetTankCapacityFunctionality() {
        Assert.assertTrue("Car doesn't return the right model!", car.getTankCapacity() == INIT_TANK_CAPACITY);
    }

    @Test
    public void testGetTankCapacityFunctionality() {
        Assert.assertTrue("Car doesn't return the right tankCapacity!", car.getTankCapacity() == INIT_TANK_CAPACITY);
    }

    @Test
    public void testGetFuelAmountFunctionality() {
        Assert.assertTrue("Car doesn't return the right fuelAmount!", car.getFuelAmount() == INIT_FUEL_AMOUNT);
    }

    @Test
    public void testGetFuelConsumptionPerKmFunctionality() {
        Assert.assertTrue("Car doesn't return the right fuelConsumption!", car.getFuelConsumptionPerKm() == INIT_FUEL_CONSUMPTION_PER_KM);
    }

    @Test(expected = IllegalArgumentException.class)
    public void testSetModelWithNull() {
        new Car(null, 2, 2, 2);
    }

    @Test(expected = IllegalArgumentException.class)
    public void testSetModelWitEmptyInput() {
        new Car(EMPTY_STRING, 2, 2, 2);
    }

    @Test(expected = IllegalArgumentException.class)
    public void testSetFuelAmountWitHigherFuelAmount() {
        new Car(MODEL, 3, 4, 2);
    }

    @Test(expected = IllegalArgumentException.class)
    public void testSetFuelConsumptionPerKmWitZero() {
        new Car(MODEL, 2, 1, 0);
    }

    @Test(expected = IllegalArgumentException.class)
    public void testSetFuelConsumptionPerKmWitNegativeNumber() {
        new Car(MODEL, 2, 1, -10);
    }

    @Test(expected = IllegalStateException.class)
    public void testDrive() {
        car.drive(2);
    }

    @Test
    public void testDriveWithCorrectParameters() {
        String drive = car.drive(1);
        Assert.assertTrue("Cannot drive that amount of kilometers", drive.equals("Have a nice trip"));
    }

    @Test(expected = IllegalStateException.class)
    public void testRefuel() {
        car.refuel(10);
    }

    @Test
    public void testRefuelWithCorrectParameters() {
        car.refuel(3);
        Assert.assertTrue("Cannot refuel that amount of liters", car.getFuelAmount() == 3 + INIT_FUEL_AMOUNT);
    }


}