japod@6: package org.apidesign.apifest08.test;
japod@6: 
japod@21: import static org.apidesign.apifest08.test.Currencies.CZK;
japod@21: import static org.apidesign.apifest08.test.Currencies.SKK;
japod@21: import static org.apidesign.apifest08.test.Currencies.USD;
japod@6: 
japod@6: import java.math.BigDecimal;
japod@6: 
japod@6: import junit.framework.TestCase;
japod@6: 
japod@6: import org.apidesign.apifest08.currency.Amount;
japod@21: import org.apidesign.apifest08.currency.ConversionException;
japod@6: import org.apidesign.apifest08.currency.Convertor;
japod@6: import org.apidesign.apifest08.currency.UnsupportedConversionException;
japod@6: 
japod@6: /** Finish the Convertor API, and then write bodies of methods inside
japod@6:  * of this class to match the given tasks. To fullfil your task, use the
japod@6:  * API define in the <code>org.apidesign.apifest08.currency</code> package.
japod@6:  * Do not you reflection, or other hacks as your code
japod@6:  * shall run without any runtime permissions.
japod@6:  */
japod@6: public class Task1Test extends TestCase {
japod@6:     public Task1Test(String testName) {
japod@6:         super(testName);
japod@6:     }
japod@6: 
japod@6:     @Override
japod@6:     protected void setUp() throws Exception {
japod@6:     }
japod@6: 
japod@6:     @Override
japod@6:     protected void tearDown() throws Exception {
japod@6:     }
japod@6: 
japod@6:     /** Create convertor that understands two currencies, CZK and
japod@6:      *  USD. Make 1 USD == 17 CZK.
japod@6:      *
japod@6:      * Creation of the convertor shall not require subclassing of any class
japod@6:      * or interface on the client side.
japod@6:      *
japod@6:      * @return prepared convertor ready for converting USD to CZK and CZK to USD
japod@6:      */
japod@6:     public static Convertor createCZKtoUSD() {
japod@21:         return new Convertor(new BigDecimal(17), USD, CZK);
japod@6:     }
japod@6: 
japod@6:     /** Create convertor that understands two currencies, CZK and
japod@6:      *  SKK. Make 100 SKK == 80 CZK.
japod@6:      *
japod@6:      * Creation of the convertor shall not require subclassing of any class
japod@6:      * or interface on the client side.
japod@6:      * 
japod@6:      * @return prepared convertor ready for converting SKK to CZK and CZK to SKK
japod@6:      */
japod@6:     public static Convertor createSKKtoCZK() {
japod@21:     	return new Convertor(new BigDecimal("0.8"), SKK, CZK);
japod@6:     }
japod@6:     
japod@6:     /** Use the convertor from <code>createCZKtoUSD</code> method and do few conversions
japod@6:      * with it.
japod@6:      */
japod@6:     public void testCurrencyCZKUSD() throws Exception {
japod@6:         Convertor c = createCZKtoUSD();
japod@6:         // convert $5 to CZK using c:
japod@6:         Amount result =  c.convert(new BigDecimal(5), USD, CZK);
japod@6:         assertEquals("Result is 85 CZK", 85, result.getValue().intValue());
japod@6: 
japod@6:         // convert $8 to CZK
japod@6:         result =  c.convert(new BigDecimal(8), USD, CZK);        
japod@6:         assertEquals("Result is 136 CZK", 136, result.getValue().intValue());
japod@6: 
japod@6:         // convert 1003CZK to USD
japod@6:         result =  c.convert(new BigDecimal(1003), CZK, USD);
japod@6:         assertEquals("Result is 59 USD", 59, result.getValue().intValue());
japod@6:     }
japod@6: 
japod@6:     /** Use the convertor from <code>createSKKtoCZK</code> method and do few conversions
japod@6:      * with it.
japod@6:      */
japod@6:     public void testCurrencySKKCZK() throws Exception {
japod@6:         Convertor c = createSKKtoCZK();
japod@6:         // convert 16CZK using c:
japod@6:         Amount result =  c.convert(new BigDecimal(16), CZK, SKK);
japod@6:         assertEquals("Result is 20 SKK", 20, result.getValue().intValue());
japod@6: 
japod@6:         // convert 500SKK to CZK
japod@6:         result =  c.convert(new BigDecimal(500), SKK, CZK);
japod@6:         assertEquals("Result is 400 CZK", 400, result.getValue().intValue());
japod@6:     }
japod@6:     
japod@21:     
japod@21:     /**
japod@21:      *  Verify that the CZK to USD convertor knows nothing about SKK.
japod@21:      */
japod@21:      public void testCannotConvertToSKKwithCZKUSDConvertor() throws Exception {
japod@21:     	 Convertor c = createCZKtoUSD();
japod@21:     	 // convert $5 to SKK, the API shall say this is not possible
japod@21:     	 try {
japod@21:     		 c.convert(new BigDecimal(5), USD, SKK);
japod@21:     		 fail("convert $5 to SKK, the API shall say this is not possible");
japod@21:     	 } catch (ConversionException e) {
japod@21:     		 //expected
japod@21:     	 }
japod@21:     	 
japod@21:     	 // convert 500 SKK to CZK, the API shall say this is not possible
japod@21:     	 
japod@21:     	 try {
japod@21:     		 c.convert(new BigDecimal("500"), SKK, CZK);
japod@21:     		 fail("convert 500 SKK to CZK, the API shall say this is not possible");
japod@21:     	 } catch (ConversionException e) {
japod@21:     		 //expected
japod@21:     	 }
japod@21:      }
japod@21:     
japod@21:     /** 
japod@21:      * Verify that the CZK to SKK convertor knows nothing about USD.
japod@21:      */
japod@21:     public void testCannotConvertToSKKwithCZKSKKConvertor() throws Exception {
japod@21:     	Convertor c = createSKKtoCZK();
japod@21:     	// convert $5 to SKK, the API shall say this is not possible
japod@6:     	try {
japod@6:     		c.convert(new BigDecimal(5), USD, SKK);
japod@21:     		fail("convert $5 to SKK, the API shall say this is not possible");
japod@21:     	} catch(ConversionException e) {
japod@21:     		//expected
japod@21:     	}
japod@21:     	
japod@21:     	try {
japod@21:     		c.convert(new BigDecimal(500), CZK, USD);	
japod@21:     		fail("convert 500 CZK to USD, the API shall say this is not possible");
japod@21:     	} catch(ConversionException e) {
japod@21:     		//expected
japod@21:     	}
japod@21:     } 
japod@6: }
japod@6: