package apifest;

 import java.math.BigDecimal;

 import junit.framework.TestCase;

 import org.apidesign.apifest08.currency.Convertor;

 import org.apidesign.apifest08.currency.ConvertorCurrency;

 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);

     }

     /** Fails because runtime incompatibility. */

     public void testCompatibility() throws Exception {

         ConvertorCurrency cur1 = ConvertorCurrency.getInstance("CZK");

         ConvertorCurrency cur2 = ConvertorCurrency.getInstance("CZK");

         assertEquals(false, cur1.equals(cur2));

     }

     /** Fails because source incompatibility. */

     public void testCompatibility2() throws Exception {

         MyOwnExchangeRateProvider provider = new MyOwnExchangeRateProvider(

                 new BigDecimal("1"), ConvertorCurrency.getInstance("USD"),

                 new BigDecimal("16"), ConvertorCurrency.getInstance("CZK"));

         Convertor c = Convertor.createConvertor(provider);

         boolean result = provider.addFixedCurencyRate(

                 ConvertorCurrency.getInstance("CZK"), new BigDecimal("80"),

                 ConvertorCurrency.getInstance("SKK"), new BigDecimal("100"));

         assertEquals(true, result);

     }

     class MyOwnExchangeRateProvider extends ExchangeRateProvider {

         public MyOwnExchangeRateProvider(BigDecimal fromValue, ConvertorCurrency fromCurrency, BigDecimal toValue, ConvertorCurrency toCurrency) {

             super(fromValue, fromCurrency, toValue, toCurrency);

         }

         public boolean addFixedCurencyRate(ConvertorCurrency fromCurrency, BigDecimal fromValue, ConvertorCurrency toCurrency, BigDecimal toValue) {

             return true; // great method - do nothing and is always satisfied ;-)

         }

     }

 }