1.1 --- a/task4/solution12/test/org/apidesign/apifest08/test/Task1Test.java Fri Oct 17 17:54:38 2008 +0200
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,174 +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.exceptions.InvalidCurrencyException;
1.12 -import org.apidesign.apifest08.currency.exceptions.UnknownConvertorException;
1.13 -
1.14 -/**
1.15 - * Finish the Convertor API, and then write bodies of methods inside of this class to match the given tasks. To fullfil
1.16 - * your task, use the API define in the <code>org.apidesign.apifest08.currency</code> package. Do not you reflection, or
1.17 - * other hacks as your code shall run without any runtime permissions.
1.18 - */
1.19 -public class Task1Test extends TestCase {
1.20 - public Task1Test(String testName) {
1.21 - super(testName);
1.22 - }
1.23 -
1.24 - @Override
1.25 - protected void setUp() throws Exception {
1.26 - }
1.27 -
1.28 - @Override
1.29 - protected void tearDown() throws Exception {
1.30 - }
1.31 -
1.32 - //
1.33 - // Imagine that there are three parts of the whole system:
1.34 - // 1. there is someone who knows the current exchange rate
1.35 - // 2. there is someone who wants to do the conversion
1.36 - // 3. there is the API between 1. and 2. which allows them to communicate
1.37 - // Please design such API
1.38 - //
1.39 -
1.40 - /**
1.41 - * Create convertor that understands two currencies, CZK and USD. Make 1 USD == 17 CZK. This is a method provided for
1.42 - * #1 group - e.g. those that know the exchange rate. They somehow need to create the objects from the API and tell
1.43 - * them the exchange rate. The API itself knows nothing about any rates, before the createCZKtoUSD method is called.
1.44 - * Creation of the convertor shall not require subclassing of any class or interface on the client side.
1.45 - * @return prepared convertor ready for converting USD to CZK and CZK to USD
1.46 - */
1.47 - public static Convertor createCZKtoUSD() {
1.48 - // set exchange rates
1.49 - Convertor.setConvertorRates(Currency.getInstance("USD"), Currency.getInstance("CZK"), 17d, 1d);
1.50 -
1.51 - // create new instance
1.52 - Convertor convertor = null;
1.53 - try {
1.54 - convertor = Convertor.getConvertorInstance(Currency.getInstance("USD"), Currency.getInstance("CZK"));
1.55 - } catch (UnknownConvertorException e) {
1.56 - e.printStackTrace();
1.57 - }
1.58 -
1.59 - return convertor;
1.60 - }
1.61 -
1.62 - /**
1.63 - * Create convertor that understands two currencies, CZK and SKK. Make 100 SKK == 80 CZK. Again this is method for the
1.64 - * #1 group - it knows the exchange rate, and needs to use the API to create objects with the exchange rate. Anyone
1.65 - * shall be ready to call this method without any other method being called previously. The API itself shall know
1.66 - * nothing about any rates, before this method is called. Creation of the convertor shall not require subclassing of
1.67 - * any class or interface on the client side.
1.68 - * @return prepared convertor ready for converting SKK to CZK and CZK to SKK
1.69 - */
1.70 - public static Convertor createSKKtoCZK() {
1.71 - // set exchange rates
1.72 - Convertor.setConvertorRates(Currency.getInstance("SKK"), Currency.getInstance("CZK"), 80d, 100d);
1.73 -
1.74 - // create new instance
1.75 - Convertor convertor = null;
1.76 - try {
1.77 - convertor = Convertor.getConvertorInstance(Currency.getInstance("SKK"), Currency.getInstance("CZK"));
1.78 - } catch (UnknownConvertorException e) {
1.79 - e.printStackTrace();
1.80 - }
1.81 -
1.82 - return convertor;
1.83 - }
1.84 -
1.85 - //
1.86 - // now the methods for group #2 follow:
1.87 - // this group knows nothing about exchange rates, but knows how to use
1.88 - // the API to do conversions. It somehow (by calling one of the factory
1.89 - // methods) gets objects from the API and uses them to do the conversions.
1.90 - //
1.91 -
1.92 - /**
1.93 - * Use the convertor from <code>createCZKtoUSD</code> method and do few conversions with it.
1.94 - */
1.95 - public void testCurrencyCZKUSD() throws Exception {
1.96 - Convertor c = createCZKtoUSD();
1.97 - // convert $5 to CZK using c:
1.98 - double result = c.convert(5, Currency.getInstance("USD"), Currency.getInstance("CZK"));
1.99 - assertEquals("Result is not 85 CZK", 85.0, result);
1.100 -
1.101 - // convert $8 to CZK
1.102 - result = c.convert(8, Currency.getInstance("USD"), Currency.getInstance("CZK"));
1.103 - assertEquals("Result is not 136 CZK", 136.0, result);
1.104 -
1.105 - // convert 1003CZK to USD
1.106 - result = c.convert(1003, Currency.getInstance("CZK"), Currency.getInstance("USD"));
1.107 - assertEquals("Result is not 59 USD", 59.0, result);
1.108 - }
1.109 -
1.110 - /**
1.111 - * Use the convertor from <code>createSKKtoCZK</code> method and do few conversions with it.
1.112 - */
1.113 - public void testCurrencySKKCZK() throws Exception {
1.114 - Convertor c = createSKKtoCZK();
1.115 -
1.116 - // convert 16CZK using c:
1.117 - double result = c.convert(16, Currency.getInstance("CZK"), Currency.getInstance("SKK"));
1.118 - assertEquals("Result is not 20 SKK", 20.0, result);
1.119 -
1.120 - // convert 500SKK to CZK
1.121 - result = c.convert(500, Currency.getInstance("SKK"), Currency.getInstance("CZK"));
1.122 - assertEquals("Result is not 400 CZK", 400.0, result);
1.123 - }
1.124 -
1.125 - /**
1.126 - * Verify that the CZK to USD convertor knows nothing about SKK.
1.127 - */
1.128 - public void testCannotConvertToSKKwithCZKUSDConvertor() throws Exception {
1.129 - Convertor c = createCZKtoUSD();
1.130 - boolean exceptionThrown = false;
1.131 -
1.132 - // convert $5 to SKK, the API shall say this is not possible
1.133 - try {
1.134 - c.convert(5, Currency.getInstance("USD"), Currency.getInstance("SKK"));
1.135 - exceptionThrown = false;
1.136 - } catch (InvalidCurrencyException e) {
1.137 - exceptionThrown = true;
1.138 - }
1.139 - assertEquals("It should be impossible to convert to SKK with USD->CZK convertor", true, exceptionThrown);
1.140 -
1.141 - // convert 500 SKK to CZK, the API shall say this is not possible
1.142 - try {
1.143 - c.convert(500, Currency.getInstance("SKK"), Currency.getInstance("CZK"));
1.144 - exceptionThrown = false;
1.145 - } catch (InvalidCurrencyException e) {
1.146 - exceptionThrown = true;
1.147 - }
1.148 - assertEquals("It should be impossible to convert from SKK with USD->CZK convertor", true, exceptionThrown);
1.149 -
1.150 - }
1.151 -
1.152 - /**
1.153 - * Verify that the CZK to SKK convertor knows nothing about USD.
1.154 - */
1.155 - public void testCannotConvertToSKKwithSKKCZKConvertor() throws Exception {
1.156 - Convertor c = createSKKtoCZK();
1.157 - boolean exceptionThrown = false;
1.158 -
1.159 - // convert $5 to SKK, the API shall say this is not possible
1.160 - try {
1.161 - c.convert(5, Currency.getInstance("USD"), Currency.getInstance("SKK"));
1.162 - exceptionThrown = false;
1.163 - } catch (InvalidCurrencyException e) {
1.164 - exceptionThrown = true;
1.165 - }
1.166 - assertEquals("It should be impossible to convert form USD with SKK->CZK convertor", true, exceptionThrown);
1.167 -
1.168 - // convert 500 CZK to USD, the API shall say this is not possible
1.169 - try {
1.170 - c.convert(500, Currency.getInstance("CZK"), Currency.getInstance("USD"));
1.171 - exceptionThrown = false;
1.172 - } catch (InvalidCurrencyException e) {
1.173 - exceptionThrown = true;
1.174 - }
1.175 - assertEquals("It should be impossible to convert to USD with SKK->CZK convertor", true, exceptionThrown);
1.176 - }
1.177 -}