package org.apidesign.apifest08.test;

 import static junit.framework.Assert.assertEquals;

 import static org.apidesign.apifest08.currency.MoneyImpl.money;

 import static org.apidesign.apifest08.test.Task1Test.CZK;

 import static org.apidesign.apifest08.test.Task1Test.USD;

 import java.math.BigDecimal;

 import org.apidesign.apifest08.currency.Convertor;

 import org.apidesign.apifest08.currency.Money;

 import org.junit.Test;

 public class OnlineConvertorTest {

 	private static final Money ONE_USD = money(1, USD);

 	@Test

 	public void testBounce()

 	{

 		Convertor c = Task3Test.createOnlineCZKUSDConvertor();

 		doBounceTest(c);

 		doBounceTest(c);

 	}

 	private void doBounceTest(Convertor c) {

 		BigDecimal expectedRate = new BigDecimal(16);

 		BigDecimal increment = new BigDecimal("0.01");

 		for (int i=0;i<100;i++)

 		{

 			assertEquals(money(expectedRate,CZK), c.convert(ONE_USD, CZK));

 			expectedRate = expectedRate.subtract(increment);

 		}

 		assertEquals(money(15,CZK), c.convert(ONE_USD, CZK));

 		for (int i=0;i<99;i++)

 		{

 			expectedRate = expectedRate.add(increment);

 			assertEquals(money(expectedRate,CZK), c.convert(ONE_USD, CZK));

 		}

 	}

 }