diff -r 978f6a78c22e -r c6b50876b5cf task4/solution12/test/org/apidesign/apifest08/test/Task1Test.java
--- a/task4/solution12/test/org/apidesign/apifest08/test/Task1Test.java	Fri Oct 17 17:54:38 2008 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,174 +0,0 @@
-package org.apidesign.apifest08.test;
-
-import java.util.Currency;
-
-import junit.framework.TestCase;
-
-import org.apidesign.apifest08.currency.Convertor;
-import org.apidesign.apifest08.currency.exceptions.InvalidCurrencyException;
-import org.apidesign.apifest08.currency.exceptions.UnknownConvertorException;
-
-/**
- * Finish the Convertor API, and then write bodies of methods inside of this class to match the given tasks. To fullfil
- * your task, use the API define in the <code>org.apidesign.apifest08.currency</code> package. Do not you reflection, or
- * other hacks as your code shall run without any runtime permissions.
- */
-public class Task1Test extends TestCase {
-  public Task1Test(String testName) {
-    super(testName);
-  }
-
-  @Override
-  protected void setUp() throws Exception {
-  }
-
-  @Override
-  protected void tearDown() throws Exception {
-  }
-
-  //
-  // Imagine that there are three parts of the whole system:
-  // 1. there is someone who knows the current exchange rate
-  // 2. there is someone who wants to do the conversion
-  // 3. there is the API between 1. and 2. which allows them to communicate
-  // Please design such API
-  //
-
-  /**
-   * Create convertor that understands two currencies, CZK and USD. Make 1 USD == 17 CZK. This is a method provided for
-   * #1 group - e.g. those that know the exchange rate. They somehow need to create the objects from the API and tell
-   * them the exchange rate. The API itself knows nothing about any rates, before the createCZKtoUSD method is called.
-   * Creation of the convertor shall not require subclassing of any class or interface on the client side.
-   * @return prepared convertor ready for converting USD to CZK and CZK to USD
-   */
-  public static Convertor createCZKtoUSD() {
-    // set exchange rates
-    Convertor.setConvertorRates(Currency.getInstance("USD"), Currency.getInstance("CZK"), 17d, 1d);
-
-    // create new instance
-    Convertor convertor = null;
-    try {
-      convertor = Convertor.getConvertorInstance(Currency.getInstance("USD"), Currency.getInstance("CZK"));
-    } catch (UnknownConvertorException e) {
-      e.printStackTrace();
-    }
-
-    return convertor;
-  }
-
-  /**
-   * Create convertor that understands two currencies, CZK and SKK. Make 100 SKK == 80 CZK. Again this is method for the
-   * #1 group - it knows the exchange rate, and needs to use the API to create objects with the exchange rate. Anyone
-   * shall be ready to call this method without any other method being called previously. The API itself shall know
-   * nothing about any rates, before this method is called. Creation of the convertor shall not require subclassing of
-   * any class or interface on the client side.
-   * @return prepared convertor ready for converting SKK to CZK and CZK to SKK
-   */
-  public static Convertor createSKKtoCZK() {
-    // set exchange rates
-    Convertor.setConvertorRates(Currency.getInstance("SKK"), Currency.getInstance("CZK"), 80d, 100d);
-
-    // create new instance
-    Convertor convertor = null;
-    try {
-      convertor = Convertor.getConvertorInstance(Currency.getInstance("SKK"), Currency.getInstance("CZK"));
-    } catch (UnknownConvertorException e) {
-      e.printStackTrace();
-    }
-
-    return convertor;
-  }
-
-  //
-  // now the methods for group #2 follow:
-  // this group knows nothing about exchange rates, but knows how to use
-  // the API to do conversions. It somehow (by calling one of the factory
-  // methods) gets objects from the API and uses them to do the conversions.
-  //
-
-  /**
-   * Use the convertor from <code>createCZKtoUSD</code> method and do few conversions with it.
-   */
-  public void testCurrencyCZKUSD() throws Exception {
-    Convertor c = createCZKtoUSD();
-    // convert $5 to CZK using c:
-    double result = c.convert(5, Currency.getInstance("USD"), Currency.getInstance("CZK"));
-    assertEquals("Result is not 85 CZK", 85.0, result);
-
-    // convert $8 to CZK
-    result = c.convert(8, Currency.getInstance("USD"), Currency.getInstance("CZK"));
-    assertEquals("Result is not 136 CZK", 136.0, result);
-
-    // convert 1003CZK to USD
-    result = c.convert(1003, Currency.getInstance("CZK"), Currency.getInstance("USD"));
-    assertEquals("Result is not 59 USD", 59.0, result);
-  }
-
-  /**
-   * Use the convertor from <code>createSKKtoCZK</code> method and do few conversions with it.
-   */
-  public void testCurrencySKKCZK() throws Exception {
-    Convertor c = createSKKtoCZK();
-
-    // convert 16CZK using c:
-    double result = c.convert(16, Currency.getInstance("CZK"), Currency.getInstance("SKK"));
-    assertEquals("Result is not 20 SKK", 20.0, result);
-
-    // convert 500SKK to CZK
-    result = c.convert(500, Currency.getInstance("SKK"), Currency.getInstance("CZK"));
-    assertEquals("Result is not 400 CZK", 400.0, result);
-  }
-
-  /**
-   * Verify that the CZK to USD convertor knows nothing about SKK.
-   */
-  public void testCannotConvertToSKKwithCZKUSDConvertor() throws Exception {
-    Convertor c = createCZKtoUSD();
-    boolean exceptionThrown = false;
-
-    // convert $5 to SKK, the API shall say this is not possible
-    try {
-      c.convert(5, Currency.getInstance("USD"), Currency.getInstance("SKK"));
-      exceptionThrown = false;
-    } catch (InvalidCurrencyException e) {
-      exceptionThrown = true;
-    }
-    assertEquals("It should be impossible to convert to SKK with USD->CZK convertor", true, exceptionThrown);
-
-    // convert 500 SKK to CZK, the API shall say this is not possible
-    try {
-      c.convert(500, Currency.getInstance("SKK"), Currency.getInstance("CZK"));
-      exceptionThrown = false;
-    } catch (InvalidCurrencyException e) {
-      exceptionThrown = true;
-    }
-    assertEquals("It should be impossible to convert from SKK with USD->CZK convertor", true, exceptionThrown);
-
-  }
-
-  /**
-   * Verify that the CZK to SKK convertor knows nothing about USD.
-   */
-  public void testCannotConvertToSKKwithSKKCZKConvertor() throws Exception {
-    Convertor c = createSKKtoCZK();
-    boolean exceptionThrown = false;
-
-    // convert $5 to SKK, the API shall say this is not possible
-    try {
-      c.convert(5, Currency.getInstance("USD"), Currency.getInstance("SKK"));
-      exceptionThrown = false;
-    } catch (InvalidCurrencyException e) {
-      exceptionThrown = true;
-    }
-    assertEquals("It should be impossible to convert form USD with SKK->CZK convertor", true, exceptionThrown);
-
-    // convert 500 CZK to USD, the API shall say this is not possible
-    try {
-      c.convert(500, Currency.getInstance("CZK"), Currency.getInstance("USD"));
-      exceptionThrown = false;
-    } catch (InvalidCurrencyException e) {
-      exceptionThrown = true;
-    }
-    assertEquals("It should be impossible to convert to USD with SKK->CZK convertor", true, exceptionThrown);
-  }
-}