package tests;

import oqube.salestaxes.Imported;
import oqube.salestaxes.Item;
import oqube.salestaxes.Sales;
import oqube.salestaxes.SalesTax;
import junit.framework.Assert;
import org.junit.Test;


public class SalesTest
{
    @Test(expected=IllegalArgumentException.class)
	public void casAddException()
    {
	/* L'argument good ne doit pas être null.
	 * Or cela ne lui pose aucun problème de passer null
	 */
	Sales sales = new Sales();
	sales.add(null);
    }
	
    @Test
	public void casAddCorrect()
    {
	/* OK */
	Sales sales = new Sales();
	Sales res = sales.add(new SalesTax(new Item("chocolat", 2)));
	Assert.assertSame(sales, res);
    }
	
    @Test
	public void casPriceCorrect1()
    {
	/* Produits avec taxes */
	Sales sales = new Sales();
	sales = sales.add(new SalesTax(new Item("chocolat", 2)));
	sales = sales.add(new Imported(new Item("CD", 10)));
	Assert.assertEquals(12.7, sales.price(), 0);
    }

    @Test
	public void casPriceCorrect2()
    {
	/* Produits sans taxes */
	Sales sales = new Sales();
	sales = sales.add(new Item("chocolat", 2));
	sales = sales.add(new Item("CD", 10));
	Assert.assertEquals(12, sales.price(), 0);
    }

	
    @Test
	public void casPriceIncorrect()
    {
	/* Produits avec taxes */
	Sales sales = new Sales();
	sales = sales.add(new SalesTax(new Item("chocolat", 2)));
	sales = sales.add(new Imported(new Item("CD", 20)));
	Assert.assertFalse(Double.compare(22, sales.price()) == 0);
    }
	
    @Test
	public void casTaxesCorrect()
    {
	Sales sales = new Sales();
	sales = sales.add(new SalesTax(new Item("chocolat", 2)));
	sales = sales.add(new Imported(new Item("CD", 100)));
	Assert.assertEquals(5.2, sales.taxes(), 0);
    }
	
    @Test
	public void casTaxesIncorrect()
    {
	Sales sales = new Sales();
	sales = sales.add(new SalesTax(new Item("chocolat", 2)));
	sales = sales.add(new Imported(new Item("CD", 100)));
	Assert.assertFalse(Double.compare(2.2, sales.taxes()) == 0);
    }
}