package apifest;

import java.math.BigDecimal;

import java.util.Currency;

import junit.framework.TestCase;

import org.apidesign.apifest08.currency.Convertor;

import org.apidesign.apifest08.currency.ConvertorFactory;

import org.apidesign.apifest08.currency.InvalidConversionException;

/** Write a test that works with version from task A and fails with version B.

 */

public class CurrencyTest extends TestCase {

    public CurrencyTest(String n) {

        super(n);

    }

    public void testCompatibility() throws Exception {

        incompatibility1();

      //  incompatibility2(); //another test proving incompatibility in versions

      //  incompatibility3(); //another test proving incompatibility in versions

    }

    private void incompatibility1() throws Exception {

          Convertor c = ConvertorFactory.getConvertor("CZK", BigDecimal.valueOf(17.0), "USD", BigDecimal.valueOf(1));

          assertTrue("", c.toString().startsWith("org.apidesign.apifest08.currency.ConvertorImpl"));

    }

    private void incompatibility2() throws Exception {

          Convertor c = ConvertorFactory.getConvertor("CZK", BigDecimal.valueOf(17.0), "USD", BigDecimal.valueOf(1));

          assertEquals("Testing hashcode", 961187025, c.hashCode());

    }

    private void incompatibility3() throws Exception {

        Convertor co = new Convertor() {

            public BigDecimal convert(Currency from, Currency to, BigDecimal amount) throws InvalidConversionException {

                return null;

            }

        };

    }

}