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));

		}

	}

}