//  Boilerplate
import org.junit.*;
import static org.junit.Assert.*;

public class CartTest
{
	@Test
	public void testCount1()
	{
		Cart cart = new Cart();
		Item item = new Applesauce();
		cart.add(item);

		int numItems = cart.getItemCount();
		assertEquals(1, numItems);
	}

	@Test
	public void testCount2()
	{
		Cart cart = new Cart();
		cart.add(new Applesauce());
		cart.add(new Applesauce());

		int numItems = cart.getItemCount();
		assertEquals(2, numItems);
	}

	@Test
	public void testCount3()
	{
		Cart cart = new Cart();
		int numItems;

		cart.add(new Applesauce());
		numItems = cart.getItemCount();
		assertEquals(1, numItems);

		cart.add(new Applesauce());
		numItems = cart.getItemCount();
		assertEquals(2, numItems);
	}

	//  As written, this test WILL FAIL.
	//  The compiler will give you advice about how to fix it.
	//  
	@Test
	public void testTotal1()
	{
		Cart cart = new Cart();
		Item item = new Applesauce();
		cart.add(item);
		double total = cart.getTotal();

		assertEquals(3.80, total);
	}

	@Test
	public void testTotal2()
	{
		Cart cart = new Cart();
		Item item = new Chicken();
		cart.add(item);
		double total = cart.getTotal();

		assertEquals(6.99, total, 0.01);
	}

	@Test
	public void testCoupon1()
	{
		Cart cart = new Cart();
		cart.add(new Applesauce());
		Coupon coupon = new ApplesauceCoupon();
		cart.add(coupon);

		double total = cart.getTotal();
		assertEquals(2.80, total, 0.01);
	}

	@Test
	public void chickenIsMeat()
	{
		Chicken chicken = new Chicken();
		assertTrue(chicken instanceof Chicken);
		assertTrue(chicken instanceof Meat);
	}

	@Test
	public void meatIsChicken()
	{
		Meat chicken = new Chicken();
		assertTrue(chicken instanceof Chicken);
		assertTrue(chicken instanceof Meat);
	}

	@Test
	public void testMeatCoupon()
	{
		Cart cart = new Cart();
		cart.add(new Chicken());
		cart.add(new MeatCoupon());

		double total = cart.getTotal();
		assertEquals(3.50, total, 0.01);
	}

	@Test
	public void testMultipleCoupons()
	{
		Cart cart = new Cart();
		cart.add(new Chicken());
		cart.add(new Applesauce());
		cart.add(new MeatCoupon());

		double total = cart.getTotal();
		assertEquals(7.30, total, 0.01);
	}

	@Test
	public void applesauceIsNotMeat1()
	{
		Item applesauce = new Applesauce();
		assertFalse(applesauce instanceof Chicken);
	}

	@Test(expected=ClassCastException.class)
	public void applesauceIsNotMeat2()
	{
		Item applesauce = new Applesauce();
		Chicken chicken = (Chicken) applesauce;
	}

	//  You don't have to do anything with this one.
	@Test
	@Ignore
	public void applesauceIsNotMeat3()
	{
		// Doesn't even compile -- why not?
		// Applesauce applesauce = new Applesauce();
		// Chicken chicken = (Chicken) applesauce;
	}

	@Test
	public void idempotent()
	{
		Cart cart = new Cart();
		cart.add(new Chicken());
		cart.add(new Applesauce());
		cart.add(new MeatCoupon());

		double total = cart.getTotal();
		assertEquals(7.30, total, 0.01);

		double total2 = cart.getTotal();
		assertEquals(total, total2, 0.0001);
	}

}