1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/task4/solution04/test/org/apidesign/apifest08/test/Task1Test.java Sat Oct 11 23:38:46 2008 +0200
1.3 @@ -0,0 +1,223 @@
1.4 +package org.apidesign.apifest08.test;
1.5 +
1.6 +
1.7 +import java.math.BigDecimal;
1.8 +import java.util.Currency;
1.9 +import java.util.Set;
1.10 +import junit.framework.TestCase;
1.11 +import org.apidesign.apifest08.currency.Convertor;
1.12 +import org.apidesign.apifest08.currency.ConvertorFactory;
1.13 +import org.apidesign.apifest08.currency.InvalidConversionException;
1.14 +
1.15 +
1.16 +/** Finish the Convertor API, and then write bodies of methods inside
1.17 + * of this class to match the given tasks. To fullfil your task, use the
1.18 + * API define in the <code>org.apidesign.apifest08.currency</code> package.
1.19 + * Do not you reflection, or other hacks as your code
1.20 + * shall run without any runtime permissions.
1.21 + */
1.22 +public class Task1Test extends TestCase {
1.23 +
1.24 + private final static Currency CZK;
1.25 + private final static Currency SKK;
1.26 + private final static Currency USD;
1.27 +
1.28 + static
1.29 + {
1.30 + CZK = Currency.getInstance("CZK");
1.31 + SKK = Currency.getInstance("SKK");
1.32 + USD = Currency.getInstance("USD");
1.33 + }
1.34 +
1.35 + public Task1Test(String testName) {
1.36 + super(testName);
1.37 + }
1.38 +
1.39 + @Override
1.40 + protected void setUp() throws Exception {
1.41 + }
1.42 +
1.43 + @Override
1.44 + protected void tearDown() throws Exception {
1.45 + }
1.46 +
1.47 + /** Create convertor that understands two currencies, CZK and
1.48 + * USD. Make 1 USD == 17 CZK.
1.49 + *
1.50 + * Creation of the convertor shall not require subclassing of any class
1.51 + * or interface on the client side.
1.52 + *
1.53 + * @return prepared convertor ready for converting USD to CZK and CZK to USD
1.54 + */
1.55 + public static Convertor createCZKtoUSD()
1.56 + {
1.57 + return (ConvertorFactory.getConvertor("CZK", BigDecimal.valueOf(17.0),
1.58 + "USD", BigDecimal.valueOf(1)));
1.59 + }
1.60 +
1.61 + /** Create convertor that understands two currencies, CZK and
1.62 + * SKK. Make 100 SKK == 80 CZK.
1.63 + *
1.64 + * Creation of the convertor shall not require subclassing of any class
1.65 + * or interface on the client side.
1.66 + *
1.67 + * @return prepared convertor ready for converting SKK to CZK and CZK to SKK
1.68 + */
1.69 + public static Convertor createSKKtoCZK()
1.70 + {
1.71 + return (ConvertorFactory.getConvertor(Currency.getInstance("SKK"), BigDecimal.valueOf(100),
1.72 + Currency.getInstance("CZK"), BigDecimal.valueOf(80)));
1.73 + }
1.74 +
1.75 + /** Use the convertor from <code>createCZKtoUSD</code> method and do few conversions
1.76 + * with it.
1.77 + */
1.78 + public void testCurrencyCZKUSD() throws Exception {
1.79 + Convertor c = createCZKtoUSD();
1.80 + BigDecimal result;
1.81 +
1.82 + // convert $5 to CZK using c:
1.83 + // assertEquals("Result is 85 CZK");
1.84 + result = c.convert(USD, CZK, BigDecimal.valueOf(5));
1.85 + assertEquals(new BigDecimal("85.00"), result);
1.86 +
1.87 + // convert $8 to CZK
1.88 + // assertEquals("Result is 136 CZK");
1.89 + result = c.convert(USD, CZK, BigDecimal.valueOf(8));
1.90 + assertEquals(new BigDecimal("136.00"), result);
1.91 +
1.92 + // convert 1003CZK to USD
1.93 + // assertEquals("Result is 59 USD");
1.94 + result = c.convert(CZK, USD, BigDecimal.valueOf(1003));
1.95 + assertEquals(new BigDecimal("59.00"), result);
1.96 + }
1.97 +
1.98 + /** Use the convertor from <code>createSKKtoCZK</code> method and do few conversions
1.99 + * with it.
1.100 + */
1.101 + public void testCurrencySKKCZK() throws Exception {
1.102 + Convertor c = createSKKtoCZK();
1.103 + BigDecimal result;
1.104 +
1.105 + // convert 16CZK using c:
1.106 + // assertEquals("Result is 20 SKK");
1.107 + result = c.convert(CZK, SKK, BigDecimal.valueOf(16));
1.108 + assertEquals(new BigDecimal("20.00"), result);
1.109 +
1.110 + // convert 500SKK to CZK
1.111 + // assertEquals("Result is 400 CZK");
1.112 + result = c.convert(SKK, CZK, BigDecimal.valueOf(500));
1.113 + assertEquals(new BigDecimal("400.00"), result);
1.114 + }
1.115 +
1.116 + /**
1.117 + * Verify that the CZK to USD convertor knows nothing about SKK.
1.118 + */
1.119 + public void testCannotConvertToSKKwithCZKUSDConvertor()
1.120 + throws Exception
1.121 + {
1.122 + Convertor c = createCZKtoUSD();
1.123 +
1.124 + try
1.125 + {
1.126 + // convert $5 to SKK, the API shall say this is not possible
1.127 + c.convert(USD, SKK, BigDecimal.valueOf(5));
1.128 + fail("cannot use the CZKtoUSD converter to convert to SKK");
1.129 + }
1.130 + catch(InvalidConversionException ex)
1.131 + {
1.132 + assertEquals("cannot convert to: SKK", ex.getMessage());
1.133 + assertEquals(SKK, ex.getBadCurrency());
1.134 + assertEquals(CZK, ex.getCurrencyA());
1.135 + assertEquals(USD, ex.getCurrencyB());
1.136 + }
1.137 +
1.138 + try
1.139 + {
1.140 + // convert 500 SKK to CZK, the API shall say this is not possible
1.141 + c.convert(SKK, CZK, BigDecimal.valueOf(5));
1.142 + fail("cannot use the CZKtoUSD converter to convert from SKK");
1.143 + }
1.144 + catch(InvalidConversionException ex)
1.145 + {
1.146 + assertEquals("cannot convert from: SKK", ex.getMessage());
1.147 + assertEquals(SKK, ex.getBadCurrency());
1.148 + assertEquals(CZK, ex.getCurrencyA());
1.149 + assertEquals(USD, ex.getCurrencyB());
1.150 + }
1.151 + }
1.152 +
1.153 + /**
1.154 + * Verify that the CZK to SKK convertor knows nothing about USD.
1.155 + */
1.156 + public void testCannotConvertToUSDwithSKKCZKConvertor()
1.157 + throws Exception
1.158 + {
1.159 + Convertor c = createSKKtoCZK();
1.160 +
1.161 + try
1.162 + {
1.163 + // convert $5 to SKK, the API shall say this is not possible
1.164 + c.convert(USD, SKK, BigDecimal.valueOf(5));
1.165 + fail("cannot use the CZKtoUSD converter to convert to SKK");
1.166 + }
1.167 + catch(InvalidConversionException ex)
1.168 + {
1.169 + assertEquals("cannot convert from: USD", ex.getMessage());
1.170 + assertEquals(USD, ex.getBadCurrency());
1.171 + assertEquals(SKK, ex.getCurrencyA());
1.172 + assertEquals(CZK, ex.getCurrencyB());
1.173 + }
1.174 +
1.175 + try
1.176 + {
1.177 + // convert 500 CZK to USD, the API shall say this is not possible
1.178 + c.convert(CZK, USD, BigDecimal.valueOf(500));
1.179 + fail("cannot use the CZKtoUSD converter to convert from SKK");
1.180 + }
1.181 + catch(InvalidConversionException ex)
1.182 + {
1.183 + assertEquals("cannot convert to: USD", ex.getMessage());
1.184 + assertEquals(USD, ex.getBadCurrency());
1.185 + assertEquals(SKK, ex.getCurrencyA());
1.186 + assertEquals(CZK, ex.getCurrencyB());
1.187 + }
1.188 + }
1.189 +
1.190 + public void testGetCurrencies()
1.191 + {
1.192 + Convertor c;
1.193 + Set<Currency> currencies;
1.194 +
1.195 + c = createSKKtoCZK();
1.196 + currencies = c.getCurrencies();
1.197 + assertEquals(2, currencies.size());
1.198 + assertTrue(currencies.contains(Currency.getInstance("SKK")));
1.199 + assertTrue(currencies.contains(Currency.getInstance("CZK")));
1.200 +
1.201 + c = createCZKtoUSD();
1.202 + currencies = c.getCurrencies();
1.203 + assertEquals(2, currencies.size());
1.204 + assertTrue(currencies.contains(Currency.getInstance("USD")));
1.205 + assertTrue(currencies.contains(Currency.getInstance("CZK")));
1.206 + }
1.207 +
1.208 + public void testGetConverstionRate()
1.209 + throws InvalidConversionException
1.210 + {
1.211 + Convertor c;
1.212 +
1.213 + c = createSKKtoCZK();
1.214 + assertEquals(1.0, c.getConversionRate(Currency.getInstance("CZK"), Currency.getInstance("CZK")).doubleValue());
1.215 + assertEquals(1.0, c.getConversionRate(Currency.getInstance("SKK"), Currency.getInstance("SKK")).doubleValue());
1.216 + assertEquals(0.80, c.getConversionRate(Currency.getInstance("SKK"), Currency.getInstance("CZK")).doubleValue());
1.217 + assertEquals(1.25, c.getConversionRate(Currency.getInstance("CZK"), Currency.getInstance("SKK")).doubleValue());
1.218 +
1.219 + c = createCZKtoUSD();
1.220 + assertEquals(1.0, c.getConversionRate(Currency.getInstance("CZK"), Currency.getInstance("CZK")).doubleValue());
1.221 + assertEquals(1.0, c.getConversionRate(Currency.getInstance("USD"), Currency.getInstance("USD")).doubleValue());
1.222 + assertEquals(1.0/17.0, c.getConversionRate(Currency.getInstance("CZK"), Currency.getInstance("USD")).doubleValue(), 0.00000000000000001);
1.223 + assertEquals(17.0, c.getConversionRate(Currency.getInstance("USD"), Currency.getInstance("CZK")).doubleValue(), 0.00000000000000001);
1.224 + }
1.225 +}
1.226 +