C.R.E.A.M. Get the money

pom.xml

@@ -10,5 +10,10 @@
 
     <dependencies>
 
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>RELEASE</version>
+        </dependency>
     </dependencies>
 </project>

src/main/java/WuTangCurrency.java

@@ -0,0 +1,31 @@
+import java.text.DecimalFormat;
+
+public class WuTangCurrency {
+
+
+    protected static final double US_DOLLAR = 1.00;
+    protected static final double EURO = 0.94;
+    protected static final double BRITISH = 0.82;
+    protected static final double INDIAN_RUPEE = 68.32;
+    protected static final double AUSTRALIAN_DOLLAR = 1.35;
+    protected static final double CANADIAN_DOLLAR = 1.32;
+    protected static final double SINGAPORE_DOLLAR = 1.43;
+    protected static final double SWISS_FRANC = 1.01;
+    protected static final double MALAYSIAN_RINGGIT = 4.47;
+    protected static final double JAPANESE_YEN = 115.84;
+    protected static final double CHINESE_YUAN_RENMINBI = 6.92;
+
+    public static double currencyExchangeFormula(double amountFrom, double rateTo, double rateFrom) {
+
+        double amountTo = amountFrom * (rateFrom / rateTo);
+
+        // tried rounding to 2 decimal places but was unsuccessful
+      //  double amountToRounded = (double)Math.round(amountTo * 100d) / 100d;
+
+        System.out.println(amountTo);
+        return amountTo;
+    }
+
+}
+
+

src/test/java/WuTangCurrencyTest.java

@@ -0,0 +1,89 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class WuTangCurrencyTest {
+
+    WuTangCurrency exchangeRate = new WuTangCurrency(); //created to test currencyExchangeFormula()
+
+    @Test
+    public void usDollarToEuroTest() {
+        double amountFrom = 1.00;
+        double expected = 0.94;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.US_DOLLAR, exchangeRate.EURO);
+        Assert.assertEquals(expected, actual, 0.01); //delta measures accuracy, within .01
+    }
+
+    @Test
+    public void EuroToUsDollarTest() {
+        double amountFrom = 0.94;
+        double expected = 1.00;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.EURO, exchangeRate.US_DOLLAR);
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void EuroToBritishPoundTest() {
+        double amountFrom = 0.94;
+        double expected = 0.82;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.EURO, exchangeRate.BRITISH);
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void BritishPoundToINDIAN_RUPEETest() {
+        double amountFrom = 0.82;
+        double expected = 68.32;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.BRITISH, exchangeRate.INDIAN_RUPEE);
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+   @Test
+    public void IndianRupeeToCanadianDollarTest(){
+        double amountFrom = 68.82;
+        double expected = 1.32;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.INDIAN_RUPEE, exchangeRate.CANADIAN_DOLLAR);
+       Assert.assertEquals(expected, actual, 0.01);
+   }
+
+    @Test
+    public void CanadianDollarToSingaporeDollarTest(){
+        double amountFrom = 1.32;
+        double expected = 1.43;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.CANADIAN_DOLLAR, exchangeRate.SINGAPORE_DOLLAR);
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void SingaporeDollarToSwissFrancTest(){
+        double amountFrom = 1.43;
+        double expected = 1.01;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.SINGAPORE_DOLLAR, exchangeRate.SWISS_FRANC);
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void SwissFrancToMalaysianRinggitTest(){
+        double amountFrom = 1.01;
+        double expected = 4.47;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.SWISS_FRANC, exchangeRate.MALAYSIAN_RINGGIT);
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void MalaysianRinggitToJapaneseYenTest(){
+        double amountFrom = 4.47;
+        double expected = 115.84;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.MALAYSIAN_RINGGIT, exchangeRate.JAPANESE_YEN);
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void JapaneseYenToChineseYuanRenminbiTest(){
+        double amountFrom = 115.84;
+        double expected = 6.92;
+        double actual = exchangeRate.currencyExchangeFormula(amountFrom, exchangeRate.JAPANESE_YEN, exchangeRate.CHINESE_YUAN_RENMINBI);
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+
+}