All but one

Crypto/src/ROT13.java

 import static java.lang.Character.isLowerCase;
 import static java.lang.Character.isUpperCase;
 import static java.lang.Character.toLowerCase;
+import java.lang.StringBuilder;
+import java.lang.String;
+import java.lang.StringBuffer;
 
 public class ROT13  {
+   static int length = 0;
+   static int start = 0;
+   String cryptText = "";
 
     ROT13(Character cs, Character cf) {
     }
 
 
     public String crypt(String text) throws UnsupportedOperationException {
+        StringBuilder builder = new StringBuilder();
 
-        return "";
+        for(int i = 0; i<text.length(); i++){
+            char c = text.charAt(i);
+        if(c>='a' && c<='m' || c>='A' && c<='M') c+=13;
+        else if(c>='n' && c<='z' || c>='N' && c<='Z') c-=13;
+        builder.append(c);
+        }
+    text = builder.toString();
+
+        return text;
     }
 
     public String encrypt(String text) {
+        for(int i = 0; i<text.length(); i++){
+            char ch = text.charAt(i);
+            if(ch>= 'A' && ch<='Z'){
+                ch = (char)(ch+13);
+                if (ch > 'Z') {
+                    ch = (char)(ch-26);
+                }
+            }
+            else if(ch>= 'a' && ch<='z'){
+                ch = (char)(ch+13);
+                if(ch>'z'){
+                    ch = (char)(ch-26);
+                }
+            }
+            cryptText = cryptText+ch;
+        }
+        text = cryptText;
         return text;
     }
 
     public String decrypt(String text) {
+        encrypt(text);
         return text;
     }
 
     public static String rotate(String s, Character c) {
+        length = s.length();
+        start = s.indexOf(c);
+        int rotate = length - start;
+        return s.substring(start, length) + s.substring(0, start);
 
-        return "";
     }
 
 }

Crypto/src/ROT13Test.java

-import org.junit.Test;
+import org.testng.annotations.Test;
 
-import static org.junit.Assert.*;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class ROT13Test {
 

SimpleCrypt.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/Crypto/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: org.opentest4j:opentest4j:1.1.0" level="project" />
+    <orderEntry type="library" name="Maven: org.junit.platform:junit-platform-commons:1.3.0-M1" level="project" />
+    <orderEntry type="library" name="Maven: org.testng:testng:6.14.3" level="project" />
+    <orderEntry type="library" name="Maven: org.junit.jupiter:junit-jupiter-api:5.3.0-M1" level="project" />
+    <orderEntry type="library" name="Maven: org.apiguardian:apiguardian-api:1.0.0" level="project" />
+    <orderEntry type="library" name="Maven: org.opentest4j:opentest4j:1.1.0" level="project" />
+    <orderEntry type="library" name="Maven: org.junit.platform:junit-platform-commons:1.3.0-M1" level="project" />
+    <orderEntry type="library" name="Maven: org.testng:testng:6.14.3" level="project" />
+    <orderEntry type="library" name="Maven: com.beust:jcommander:1.72" level="project" />
+    <orderEntry type="library" name="Maven: org.apache-extras.beanshell:bsh:2.0b6" level="project" />
+  </component>
+</module>

pom.xml

     <groupId>com.zipcodewilmington</groupId>
     <artifactId>SimpleCrypt</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>RELEASE</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.testng</groupId>
+            <artifactId>testng</artifactId>
+            <version>RELEASE</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.testng</groupId>
+            <artifactId>testng</artifactId>
+            <version>RELEASE</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
 
 
 </project>