1.1 --- a/task4/solution02/test/org/apidesign/apifest08/test/Task1Test.java Fri Oct 17 17:40:14 2008 +0200
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,160 +0,0 @@
1.4 -package org.apidesign.apifest08.test;
1.5 -
1.6 -import java.util.Currency;
1.7 -
1.8 -import junit.framework.TestCase;
1.9 -
1.10 -import org.apidesign.apifest08.currency.Convertor;
1.11 -import org.apidesign.apifest08.currency.ConvertorFactory;
1.12 -import org.apidesign.apifest08.currency.MoneyImpl;
1.13 -
1.14 -/** Finish the Convertor API, and then write bodies of methods inside
1.15 - * of this class to match the given tasks. To fullfil your task, use the
1.16 - * API define in the <code>org.apidesign.apifest08.currency</code> package.
1.17 - * Do not you reflection, or other hacks as your code
1.18 - * shall run without any runtime permissions.
1.19 - */
1.20 -public class Task1Test extends TestCase {
1.21 -
1.22 - public static final Currency USD = Currency.getInstance("USD");
1.23 - public static final Currency CZK = Currency.getInstance("CZK");
1.24 - public static final Currency SKK = Currency.getInstance("SKK");
1.25 -
1.26 - public Task1Test(String testName) {
1.27 - super(testName);
1.28 - }
1.29 -
1.30 - @Override
1.31 - protected void setUp() throws Exception {
1.32 - }
1.33 -
1.34 - @Override
1.35 - protected void tearDown() throws Exception {
1.36 - }
1.37 -
1.38 - //
1.39 - // Imagine that there are three parts of the whole system:
1.40 - // 1. there is someone who knows the current exchange rate
1.41 - // 2. there is someone who wants to do the conversion
1.42 - // 3. there is the API between 1. and 2. which allows them to communicate
1.43 - // Please design such API
1.44 - //
1.45 -
1.46 - /** Create convertor that understands two currencies, CZK and
1.47 - * USD. Make 1 USD == 17 CZK. This is a method provided for #1 group -
1.48 - * e.g. those that know the exchange rate. They somehow need to create
1.49 - * the objects from the API and tell them the exchange rate. The API itself
1.50 - * knows nothing about any rates, before the createCZKtoUSD method is called.
1.51 - *
1.52 - * Creation of the convertor shall not require subclassing of any class
1.53 - * or interface on the client side.
1.54 - *
1.55 - * @return prepared convertor ready for converting USD to CZK and CZK to USD
1.56 - */
1.57 - public static Convertor createCZKtoUSD() {
1.58 - return ConvertorFactory.createConvertor(new MoneyImpl(17,CZK), new MoneyImpl(1,USD));
1.59 - }
1.60 -
1.61 - /** Create convertor that understands two currencies, CZK and
1.62 - * SKK. Make 100 SKK == 80 CZK. Again this is method for the #1 group -
1.63 - * it knows the exchange rate, and needs to use the API to create objects
1.64 - * with the exchange rate. Anyone shall be ready to call this method without
1.65 - * any other method being called previously. The API itself shall know
1.66 - * nothing about any rates, before this method is called.
1.67 - *
1.68 - * Creation of the convertor shall not require subclassing of any class
1.69 - * or interface on the client side.
1.70 - *
1.71 - * @return prepared convertor ready for converting SKK to CZK and CZK to SKK
1.72 - */
1.73 - public static Convertor createSKKtoCZK() {
1.74 - return ConvertorFactory.createConvertor(new MoneyImpl(100,SKK), new MoneyImpl(80,CZK));
1.75 - }
1.76 -
1.77 - //
1.78 - // now the methods for group #2 follow:
1.79 - // this group knows nothing about exchange rates, but knows how to use
1.80 - // the API to do conversions. It somehow (by calling one of the factory
1.81 - // methods) gets objects from the API and uses them to do the conversions.
1.82 - //
1.83 -
1.84 - /** Use the convertor from <code>createCZKtoUSD</code> method and do few conversions
1.85 - * with it.
1.86 - */
1.87 - public void testCurrencyCZKUSD() throws Exception {
1.88 - Convertor c = createCZKtoUSD();
1.89 - // convert $5 to CZK using c:
1.90 - assertEquals("Result is 85 CZK",new MoneyImpl(85,CZK), c.convert(new MoneyImpl(5,USD),CZK));
1.91 -
1.92 - // convert $8 to CZK
1.93 - assertEquals("Result is 136 CZK",new MoneyImpl(136,CZK), c.convert(new MoneyImpl(8,USD),CZK));
1.94 -
1.95 - // convert 1003CZK to USD
1.96 - assertEquals("Result is 59 USD", new MoneyImpl(59,USD), c.convert(new MoneyImpl(1003,CZK),USD));
1.97 -
1.98 - }
1.99 -
1.100 - /** Use the convertor from <code>createSKKtoCZK</code> method and do few conversions
1.101 - * with it.
1.102 - */
1.103 - public void testCurrencySKKCZK() throws Exception {
1.104 - Convertor c = createSKKtoCZK();
1.105 - // convert 16CZK using c:
1.106 - assertEquals("Result is 20 SKK", new MoneyImpl(20,SKK), c.convert(new MoneyImpl(16,CZK),SKK));
1.107 -
1.108 - // convert 500SKK to CZK
1.109 - assertEquals("Result is 400 CZK", new MoneyImpl(400,CZK), c.convert(new MoneyImpl(500,SKK),CZK));
1.110 - }
1.111 -
1.112 - /** Verify that the CZK to USD convertor knows nothing about SKK.
1.113 - */
1.114 - public void testCannotConvertToSKKwithCZKUSDConvertor() throws Exception {
1.115 - Convertor c = createCZKtoUSD();
1.116 - // convert $5 to SKK, the API shall say this is not possible
1.117 - try
1.118 - {
1.119 - c.convert(new MoneyImpl(5, USD), SKK);
1.120 - fail("Exception expected");
1.121 - }
1.122 - catch(IllegalArgumentException e)
1.123 - {
1.124 - assertTrue("Ok",true);
1.125 - }
1.126 - // convert 500 SKK to CZK, the API shall say this is not possible
1.127 - try
1.128 - {
1.129 - c.convert(new MoneyImpl(500, SKK), CZK);
1.130 - fail("Exception expected");
1.131 - }
1.132 - catch(IllegalArgumentException e)
1.133 - {
1.134 - assertTrue("Ok",true);
1.135 - }
1.136 - }
1.137 -
1.138 - /** Verify that the CZK to SKK convertor knows nothing about USD.
1.139 - */
1.140 - public void testCannotConvertToUSDwithCZKSKKConvertor() throws Exception {
1.141 - Convertor c = createSKKtoCZK();
1.142 - // convert $5 to SKK, the API shall say this is not possible
1.143 - try
1.144 - {
1.145 - c.convert(new MoneyImpl(5, USD), SKK);
1.146 - fail("Exception expected");
1.147 - }
1.148 - catch(IllegalArgumentException e)
1.149 - {
1.150 - assertTrue("Ok",true);
1.151 - }
1.152 - // convert 500 CZK to USD, the API shall say this is not possible
1.153 - try
1.154 - {
1.155 - c.convert(new MoneyImpl(500, CZK), USD);
1.156 - fail("Exception expected");
1.157 - }
1.158 - catch(IllegalArgumentException e)
1.159 - {
1.160 - assertTrue("Ok",true);
1.161 - }
1.162 - }
1.163 -}