diff -r 000000000000 -r 621462e58e22 taskx/ked/against-solution04/test/apifest/CurrencyTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/taskx/ked/against-solution04/test/apifest/CurrencyTest.java	Sat Oct 25 20:30:54 2008 +0200
@@ -0,0 +1,33 @@
+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
+        }
+    }
+}