japod@23: package org.apidesign.apifest08.test;
japod@23: 
japod@23: import java.math.BigDecimal;
japod@23: import junit.framework.TestCase;
japod@23: import org.apidesign.apifest08.currency.ConversionResult;
japod@23: import org.apidesign.apifest08.currency.Convertor;
japod@23: import org.apidesign.apifest08.currency.ConvertorCurrency;
japod@23: import org.apidesign.apifest08.currency.ExchangeRateProvider;
japod@41: import org.apidesign.apifest08.currency.ConversionNotSupportedException;
japod@23: 
japod@23: /** Finish the Convertor API, and then write bodies of methods inside
japod@23:  * of this class to match the given tasks. To fullfil your task, use the
japod@23:  * API define in the <code>org.apidesign.apifest08.currency</code> package.
japod@23:  * Do not you reflection, or other hacks as your code
japod@23:  * shall run without any runtime permissions.
japod@23:  */
japod@23: public class Task1Test extends TestCase {
japod@23:     public Task1Test(String testName) {
japod@23:         super(testName);
japod@23:     }
japod@23: 
japod@23:     @Override
japod@23:     protected void setUp() throws Exception {
japod@23:     }
japod@23: 
japod@23:     @Override
japod@23:     protected void tearDown() throws Exception {
japod@23:     }
japod@23: 
japod@23:     /** Create convertor that understands two currencies, CZK and
japod@23:      *  USD. Make 1 USD == 17 CZK.
japod@23:      *
japod@23:      * Creation of the convertor shall not require subclassing of any class
japod@23:      * or interface on the client side.
japod@23:      *
japod@23:      * @return prepared convertor ready for converting USD to CZK and CZK to USD
japod@23:      */
japod@41:     public static Convertor createCZKtoUSD() {
japod@23:         ConvertorCurrency fromCurrency = ConvertorCurrency.getInstance("CZK");
japod@23:         ConvertorCurrency toCurrency = ConvertorCurrency.getInstance("USD");
japod@23:         ExchangeRateProvider exchangeRateProvider = new ExchangeRateProvider(new BigDecimal(17), fromCurrency, new BigDecimal(1), toCurrency);
japod@23:         
japod@23:         return Convertor.createConvertor(exchangeRateProvider);
japod@23:     }
japod@23: 
japod@23:     /** Create convertor that understands two currencies, CZK and
japod@23:      *  SKK. Make 100 SKK == 80 CZK.
japod@23:      *
japod@23:      * Creation of the convertor shall not require subclassing of any class
japod@23:      * or interface on the client side.
japod@23:      * 
japod@23:      * @return prepared convertor ready for converting SKK to CZK and CZK to SKK
japod@23:      */
japod@41:     public static Convertor createSKKtoCZK() {
japod@23:         ConvertorCurrency fromCurrency = ConvertorCurrency.getInstance("SKK");
japod@23:         ConvertorCurrency toCurrency = ConvertorCurrency.getInstance("CZK");
japod@23:         ExchangeRateProvider exchangeRateProvider = new ExchangeRateProvider(new BigDecimal(100), fromCurrency, new BigDecimal(80), toCurrency);
japod@23:         
japod@23:         return Convertor.createConvertor(exchangeRateProvider);
japod@23:     }
japod@23:     
japod@23:     
japod@41:     public static Convertor createCZKtoYEN() {
japod@23:         ConvertorCurrency fromCurrency = ConvertorCurrency.getInstance("CZK");
japod@23:         ConvertorCurrency toCurrency = ConvertorCurrency.getInstance("JPY");
japod@23:         ExchangeRateProvider exchangeRateProvider = new ExchangeRateProvider(new BigDecimal(1), fromCurrency, new BigDecimal(1), toCurrency);
japod@23:         
japod@23:         return Convertor.createConvertor(exchangeRateProvider);
japod@23:     }
japod@23:     
japod@23:     /** Use the convertor from <code>createCZKtoUSD</code> method and do few conversions
japod@23:      * with it.
japod@23:      */
japod@23:     public void testCurrencyCZKUSD() throws Exception {
japod@23:         Convertor convertCzkUsd = createCZKtoUSD();
japod@23: 
japod@23:         {
japod@23:             // convert $1 to CZK using c:
japod@23:             ConversionResult result = convertCzkUsd.convertBack(new BigDecimal(1));
japod@23:             assertEquals("Result is 17 CZK", new BigDecimal("17.00"), result.getConverted());
japod@23:             assertEquals("No Remainer", BigDecimal.ZERO, result.getRemainder());
japod@23:         }
japod@23: 
japod@23:         {
japod@23:             // convert 17CKZ to $ using c:
japod@23:             ConversionResult result = convertCzkUsd.convert(new BigDecimal(17));
japod@23:             assertEquals("Result is 1 $", new BigDecimal("1.00"), result.getConverted());
japod@23:             assertEquals("No Remainer", BigDecimal.ZERO, result.getRemainder());
japod@23:         }
japod@23: 
japod@23:         {
japod@23:             // convert $5 to CZK using c:
japod@23:             ConversionResult result = convertCzkUsd.convertBack(new BigDecimal(5));
japod@23:             assertEquals("Result is 85 CZK", new BigDecimal("85.00"), result.getConverted());
japod@23:             assertEquals("No Remainer", BigDecimal.ZERO, result.getRemainder());
japod@23:         }
japod@23:         
japod@23:         {
japod@23:             // convert $8 to CZK
japod@23:             ConversionResult result = convertCzkUsd.convertBack(new BigDecimal(8));
japod@23:             assertEquals("Result is 136 CZK", new BigDecimal("136.00"), result.getConverted());
japod@23:             assertEquals("No Remainer", BigDecimal.ZERO, result.getRemainder());
japod@23:         }
japod@23: 
japod@23:         {
japod@23:             // convert 1003CZK to USD
japod@23:             ConversionResult result = convertCzkUsd.convert(new BigDecimal(1003));
japod@23:             assertEquals("Result is 59 USD", new BigDecimal("59.00"), result.getConverted());
japod@23:             assertEquals("No Remainer", BigDecimal.ZERO, result.getRemainder());
japod@23:         }
japod@23:     }
japod@23: 
japod@23:     /** Use the convertor from <code>createSKKtoCZK</code> method and do few conversions
japod@23:      * with it.
japod@23:      */
japod@23:     public void testCurrencySKKCZK() throws Exception {
japod@23:         Convertor convertSkkCzk = createSKKtoCZK();
japod@23:         {
japod@23:             // convert 100SKK using c:
japod@23:             ConversionResult result = convertSkkCzk.convert(new BigDecimal(100));
japod@23:             assertEquals("Result is 80 CZK", new BigDecimal("80.00"), result.getConverted());
japod@23:         }
japod@23:         {
japod@23:             // convert 80CZK using c:
japod@23:             ConversionResult result = convertSkkCzk.convertBack(new BigDecimal(80));
japod@23:             assertEquals("Result is 100 SKK", new BigDecimal("100.00"), result.getConverted());
japod@23:         }
japod@23:         
japod@23:         {
japod@23:             // convert 16CZK using c:
japod@23:             ConversionResult result = convertSkkCzk.convertBack(new BigDecimal(16));
japod@23:             assertEquals("Result is 20 SKK", new BigDecimal("20.00"), result.getConverted());
japod@23:         }
japod@23: 
japod@23:         {
japod@23:             // convert 500SKK to CZK
japod@23:             ConversionResult result = convertSkkCzk.convert(new BigDecimal(500));
japod@23:             assertEquals("Result is 400 CZK", new BigDecimal("400.00"), result.getConverted());
japod@23:             assertEquals("No Remainer", BigDecimal.ZERO, result.getRemainder());            
japod@23:         }
japod@23:         
japod@23:         {
japod@23:             // convert 501SKK to CZK
japod@23:             ConversionResult result = convertSkkCzk.convert(new BigDecimal(501));
japod@23:             assertEquals("Result is 400 CZK", new BigDecimal("400.80"), result.getConverted());
japod@23:             assertEquals("No Remainer", BigDecimal.ZERO, result.getRemainder());
japod@23:             
japod@23:         }
japod@23:     }
japod@23:     
japod@23:     /**
japod@23:      * Convert SKK to CZK. Convertor can't convert whole amout (can't convert one SKK cent to CZK). Remaining
japod@23:      * amount is stored in remainder result.
japod@23:      * 
japod@23:      * Test is currently failing, because implementation can't handle this case.
japod@23:      */
japod@23: //    public void testConvertSmallUnits_failing() {
japod@23: //        Convertor convertSkkCzk = createSKKtoCZK();
japod@23: //        {
japod@23: //            // convert 501SKK to CZK
japod@23: //            ConversionResult result = convertSkkCzk.convert(new BigDecimal("501.01"));
japod@23: //            assertEquals("Result is 400 CZK", new BigDecimal("400.80"), result.getConverted());
japod@23: //            assertEquals("No Remainer", new BigDecimal("0.01"), result.getRemainder());
japod@23: //            
japod@23: //        }
japod@23: //        
japod@23: //    }
japod@23:     
japod@23:     /**
japod@23:      * Test converting from CZK to JPY. Remained has scale of CZK.
japod@23:      * 
japod@23:      * This test is currently failing, because converter implementation currently can't handle conversion from "cent" to "no-cent" currency.
japod@23:      */
japod@23: //    public void testConvertCzkToJpy_failing() {
japod@23: //        Convertor convertSkkCzk = createCZKtoYEN();
japod@23: //        {
japod@23: //            // convert 501SKK to CZK
japod@23: //            ConversionResult result = convertSkkCzk.convert(new BigDecimal("120.00"));
japod@23: //            assertEquals("Result is 120 YEN", new BigDecimal("120"), result.getConverted());
japod@23: //            assertEquals("No Remainer", new BigDecimal("0.00"), result.getRemainder());
japod@23: //            
japod@23: //        }
japod@23: //    }
japod@23:     
japod@23:     /**
japod@23:      * Test converting from JPY to CZK. Remained has scale of JPY.
japod@23:      * 
japod@23:      * This test is currently failing, because converter implementation currently can't handle conversion from "cent" to "no-cent" currency.
japod@23:      */
japod@23: //    public void testConvertJpyToCzk_failing() {
japod@23: //        Convertor convertSkkCzk = createCZKtoYEN();
japod@23: //        {
japod@23: //            // convert 501SKK to CZK
japod@23: //            ConversionResult result = convertSkkCzk.convert(new BigDecimal("120.00"));
japod@23: //            assertEquals("Result is 120 YEN", new BigDecimal("120"), result.getConverted());
japod@23: //            assertEquals("No Remainer", new BigDecimal("0"), result.getRemainder());
japod@23: //            
japod@23: //        }
japod@23: //    }
japod@23:     
japod@23:     public void testCannotConvertToSKKwithCZKUSDConvertor() throws Exception {
japod@23:             Convertor c = createCZKtoUSD();
japod@23:             // convert $5 to SKK, the API shall say this is not possible
japod@41:             try {
japod@41:                 c.convert(ConvertorCurrency.getInstance("USD"), ConvertorCurrency.getInstance("SKK"), new BigDecimal(5));
japod@41:                 fail();
japod@41:             } catch (ConversionNotSupportedException e) {
japod@41:                 //expected error;
japod@41:                 assertEquals("Exception From USD", "USD",e.getFromCurrecyCode());
japod@41:                 assertEquals("Exception To SKK", "SKK",e.getToCurrecyCode());
japod@41:             }
japod@23:             // convert 500 SKK to CZK, the API shall say this is not possible
japod@41:             try {
japod@41:                 c.convert(ConvertorCurrency.getInstance("SKK"), ConvertorCurrency.getInstance("CZK"), new BigDecimal(500));
japod@41:                 fail();
japod@41:             } catch (ConversionNotSupportedException e) {
japod@41:                 assertEquals("Exception From USD", "SKK",e.getFromCurrecyCode());
japod@41:                 assertEquals("Exception To SKK", "CZK",e.getToCurrecyCode());            }
japod@23:     }
japod@23:     
japod@23:  
japod@23: }
japod@23: