package apifest;

 import junit.framework.TestCase;

 import org.apidesign.apifest08.currency.ConvertorCurrency;

 import org.apidesign.apifest08.currency.ExchangeRate;

 import org.apidesign.apifest08.currency.ExchangeRateProvider;

 /** 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 {

        ExchangeRateProvider e = new ExchangeRateProvider(null, null, null, null) {

            private ExchangeRate getExchangeRate(ConvertorCurrency a, ConvertorCurrency b) { //in version B it shouln't compile

                return null;

            }

        };

     }

 }