12:19 10/12/18

src/AssessmentPartThree.java

 
-public class AssessmentPartThree {
+public class AssessmentPartThree 
+{
 
 	// The simplest form of encryption is the rotation cipher (also known as Caeser's Cipher)
 	// An offset value is chosen to encrypt a message. Each letter is replaced by the
@@ -17,6 +18,10 @@ public class AssessmentPartThree {
 	// Lower case characters remain lower case, upper case remain upper case
 	// Any other characters are returned unchanged
 	  
+		//Dealing with negative offsets
+		theOffset = (theOffset < 0) ? 26 + theOffset : theOffset;
+		//ensures that the offset will "wrap around"
+		
 		//Uppercase characters
 		if((theChar >= 65) && (theChar <= 90)) //65 to 90 = A to B
 		{
@@ -35,7 +40,9 @@ public class AssessmentPartThree {
 		                     (                                  + 97)		+ ASCII a/A to return result to ASCII char
 		              (char) 												result needs to be casted to char 
 		*/
+		
 		return theChar;
+		//any non alphabetical chars will fall through and return original char
 	}
 
 	 

src/AssessmentPartThreeTest.java

@@ -23,7 +23,10 @@ class AssessmentPartThreeTest {
 					"q,-3,n",
 					"G,6,M",
 					"5,-3,5",
-					"T,-7,M"
+					"T,-7,M",
+					"a,31,f",
+					"T,-33,M",
+					"!, 2, !"
 	})	
 	void testEnryptedCharacter(char theChar, int theOffset, char encChar) {
 		assertEquals(encChar,test.enryptedCharacter(theChar, theOffset));