encrypt method

Crypto/Test/ROT13Test.java

@@ -61,7 +61,7 @@ public class ROT13Test {
 
         // When
         String actual = cipher.encrypt(Q1);
-        System.out.println(Q1);
+        System.out.println(actual);
         System.out.println(A1);
         // Then
         assertTrue(actual.equals(A1));

Crypto/src/ROT13.java

@@ -19,16 +19,37 @@ public class ROT13  {
 
 
     public String crypt(String text) throws UnsupportedOperationException {
-
-        return "";
+    return text;
     }
 
     public String encrypt(String text) {
-        return text;
+        String result = "";
+        int rotator = cf-cs;
+        boolean isUppercase = false;
+        for(int i=0; i<text.length(); i++){
+            isUppercase = Character.isUpperCase(text.charAt(i));
+            int temp = Character.toLowerCase(text.charAt(i));
+            if (temp==32){
+            } else if(temp+rotator < 122){
+            temp = (int)text.charAt(i)+rotator;
+            } else {
+                temp = 96 + ((temp+rotator)-122);
+            }
+            if(isUppercase){Character.toUpperCase(temp);}
+            result+= (char)temp;
+        }
+        return result;
     }
 
     public String decrypt(String text) {
-        return text;
+        String result = "";
+        int temp = 0;
+        int rotator = cf-cs;
+        for(int i=0; i<text.length(); i++){
+            temp = (int)text.charAt(i)-rotator;
+            result+= (char)temp;
+        }
+        return result;
     }
 
     public static String rotate(String s, Character c) {