complete

pom.xml

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

src/main/java/CurrencyConverter.java

@@ -0,0 +1,54 @@
+ public class CurrencyConverter {
+//private forces encapsulation
+     //static only one value shared by entire class
+     //final cannot be changed
+     //double type
+     private static final double USD = 1.00;
+     private static final double EUR = 0.94;
+     private static final double GBP = 0.82;
+     private static final double RUPEE = 68.32;
+     private static final double AUD = 1.35;
+     private static final double CAD = 1.32;
+     private static final double SGD = 1.43;
+     private static final double FRANC = 1.01;
+     private static final double RINGGIT = 4.47;
+     private static final double YEN = 115.84;
+     private static final double YUAN = 6.92;
+
+
+     //method 'convert' to get the value(amount of money to exchange) * ending/starting
+     public double convert(double value, String starting, String ending) {
+//to convert you need to take the value given and
+         return value * getExchangeRate(ending) / getExchangeRate(starting);
+     }
+
+     //use a switch statement to get and return currencies
+     private double getExchangeRate(String currency) {
+         switch (currency) {
+             case "USD":
+                 return USD;
+             case "EUR":
+                 return EUR;
+             case "GBP":
+                 return GBP;
+             case "RUPEE":
+                 return RUPEE;
+             case "AUD":
+                 return AUD;
+             case "CAD":
+                 return CAD;
+             case "SGD":
+                 return SGD;
+             case "FRANC":
+                 return FRANC;
+             case "RINGGIT":
+                 return RINGGIT;
+             case "YEN":
+                 return YEN;
+             case "YUAN":
+                 return YUAN;
+         }
+
+         return 0;
+     }
+ }

src/test/java/CurrencyConverterTest.java

@@ -0,0 +1,205 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class CurrencyConverterTest {
+
+    @Test
+    public void convertDollartoEuro() {
+        //Arrange
+        double initialValue = 1; //starting currency
+        double expectedValue = .94; //what you want your currency to exchange
+        String startingCurrency = "USD";
+        String endingCurrency = "EUR";
+
+        //Act - what we are actually doing
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go!!
+
+    }
+    @Test
+    public void convertEurotoDollar() {
+        //Arrange
+        double initialValue = .94; //starting currency
+        double expectedValue = 1; //what you want your currency to exchange
+        String startingCurrency = "EUR";
+        String endingCurrency = "USD";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertEurotoPound() {
+        //Arrange
+        double initialValue = .94; //starting currency
+        double expectedValue = .82; //what you want your currency to exchange
+        String startingCurrency = "EUR";
+        String endingCurrency = "GBP";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertPoundtoRupee() {
+        //Arrange
+        double initialValue = .82; //starting currency
+        double expectedValue = 68.32; //what you want your currency to exchange
+        String startingCurrency = "GBP";
+        String endingCurrency = "RUPEE";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertRupeetoAUD() {
+        //Arrange
+        double initialValue = 68.32; //starting currency
+        double expectedValue = 1.35; //what you want your currency to exchange
+        String startingCurrency = "RUPEE";
+        String endingCurrency = "AUD";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertAUDtoCAD() {
+        //Arrange
+        double initialValue = 1.35; //starting currency
+        double expectedValue = 1.32; //what you want your currency to exchange
+        String startingCurrency = "AUD";
+        String endingCurrency = "CAD";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertCADtoSGD() {
+        //Arrange
+        double initialValue = 1.32; //starting currency
+        double expectedValue = 1.43; //what you want your currency to exchange
+        String startingCurrency = "CAD";
+        String endingCurrency = "SGD";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertSGDtoFranc() {
+        //Arrange
+        double initialValue = 1.43; //starting currency
+        double expectedValue = 1.01; //what you want your currency to exchange
+        String startingCurrency = "SGD";
+        String endingCurrency = "FRANC";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertFranctoRinggit() {
+        //Arrange
+        double initialValue = 1.01; //starting currency
+        double expectedValue = 4.47; //what you want your currency to exchange
+        String startingCurrency = "FRANC";
+        String endingCurrency = "RINGGIT";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertRinggittoYen() {
+        //Arrange
+        double initialValue = 4.47; //starting currency
+        double expectedValue = 115.84; //what you want your currency to exchange
+        String startingCurrency = "RINGGIT";
+        String endingCurrency = "YEN";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+    @Test
+    public void convertYentoYuan() {
+        //Arrange
+        double initialValue = 115.84; //starting currency
+        double expectedValue = 6.92; //what you want your currency to exchange
+        String startingCurrency = "YEN";
+        String endingCurrency = "YUAN";
+
+        //Act
+        CurrencyConverter currencyConverter = new CurrencyConverter(); //new object to test method
+        double actual = currencyConverter.convert(initialValue, startingCurrency, endingCurrency);
+        //call on our method 'convert; with values to test
+
+        //Assert
+        Assert.assertEquals(expectedValue, actual, .000000001);
+        //delta means how long we want our decimal to go
+
+    }
+
+}