package org.apidesign.apifest08.test;

 import junit.framework.*;

 import org.apidesign.apifest08.currency.*;

 import java.util.*;

 /** 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 {

 	private static final String

 			USD = "USD",

 			CZK = "CZK",

 			SKK = "SKK";

 	private static final Currency

 			USD2 = Currency.getInstance(USD),

 			CZK2 = Currency.getInstance(CZK),

 			SKK2 = Currency.getInstance(SKK);

 	public Task1Test(String testName) {

     	super(testName);

     }

     @Override

     protected void setUp() throws Exception {

 	}

     @Override

     protected void tearDown() throws Exception {

     }

     /** Create convertor that understands two currencies, CZK and

      *  USD. Make 1 USD == 17 CZK.

      *

      * 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 CurrencyConverter createCZKtoUSD() {

 		return OfflineConverterProvider.getInstance().getConverter(17, CZK, 1, USD);

     }

 	public static CurrencyConverter createCZKtoUSD2() {

 		return OfflineConverterProvider.getInstance().getConverter(CZK, USD);

     }

     /** Create convertor that understands two currencies, CZK and

      *  SKK. Make 100 SKK == 80 CZK.

      *

      * 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 CurrencyConverter createSKKtoCZK() {

         return OfflineConverterProvider.getInstance().getConverter(100, SKK, 80, CZK);

     }

 	public static CurrencyConverter createSKKtoCZK2() {

         return OfflineConverterProvider.getInstance().getConverter(SKK, CZK);

     }

     /** Use the convertor from <code>createCZKtoUSD</code> method and do few conversions

      * with it.

      */

     public void testCurrencyCZKUSD() throws Exception {

 		CurrencyConverter c = createCZKtoUSD();

 		testCZKUSD(c);

 		// test without specifying rates

 		c = createCZKtoUSD2();

 		testCZKUSD(c);

 	}

 	private void testCZKUSD(CurrencyConverter c) {

 		double czk, usd;

 		// convert $5 to CZK using c:

 		// assertEquals("Result is 85 CZK");

 		czk = c.convert(5, USD, CZK);

 		assertEquals(85.0, czk, 0.0);

 		czk = c.convert(5, USD2, CZK2);

 		assertEquals(85.0, czk, 0.0);

 		// convert $8 to CZK

 		// assertEquals("Result is 136 CZK");

 		czk = c.convert(8, USD, CZK);

 		assertEquals(136.0, czk, 0.0);

 		czk = c.convert(8, USD2, CZK2);

 		assertEquals(136.0, czk, 0.0);

 		// convert 1003CZK to USD

 		// assertEquals("Result is 59 USD");

 		usd = c.convert(1003, CZK, USD);

 		assertEquals(59.0, usd, 0.0);

 		usd = c.convert(1003, CZK2, USD2);

 		assertEquals(59.0, usd, 0.0);

 	}

 	/** Use the convertor from <code>createSKKtoCZK</code> method and do few conversions

      * with it.

      */

     public void testCurrencySKKCZK() throws Exception {

 		CurrencyConverter c = createSKKtoCZK();

 		testCZKSKK(c);

 		// test without specifying rates

 		c = createSKKtoCZK2();

 		testCZKSKK(c);

 	}

 	private void testCZKSKK(CurrencyConverter c) {

 		double czk, skk;

 		// convert 16CZK using c:

 		// assertEquals("Result is 20 SKK");

 		skk = c.convert(16, CZK, SKK);

 		assertEquals(20.0, skk, 0.0);

 		skk = c.convert(16, CZK2, SKK2);

 		assertEquals(20.0, skk, 0.0);

 		// convert 500SKK to CZK

 		// assertEquals("Result is 400 CZK");

 		czk = c.convert(500, SKK, CZK);

 		assertEquals(400.0, czk, 0.0);

 		czk = c.convert(500, SKK2, CZK2);

 		assertEquals(400.0, czk, 0.0);

 	}

 }