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.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 {

         Convertor myOwnImplementationOfConvertor =

                 new MyOwnImplementationOfConvertor();

         BigDecimal result = myOwnImplementationOfConvertor.convert(

                 Currency.getInstance("CZK"),

                 Currency.getInstance("USD"),

                 new BigDecimal("1"));

         assertEquals(1, result.intValue());

     }

     class MyOwnImplementationOfConvertor implements Convertor {

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

             return amount; // not very smart implementation

         }

     }

 }