Crypto/src/Main/java/ROT13.java

@@ -0,0 +1,58 @@
+import static java.lang.Character.isLowerCase;
+import static java.lang.Character.isUpperCase;
+import static java.lang.Character.toLowerCase;
+
+public class ROT13  {
+
+    ROT13(Character cs, Character cf) {
+    }
+
+    ROT13() {
+    }
+
+
+    public String crypt(String text) throws UnsupportedOperationException {
+
+        return encrypt(text);
+    }
+
+    //Turn string into char array, and iterate through it.
+    //Separate lower and uppercase letter.
+    //if letter is above M, subtract 13 letters, otherwise add 13 letters.
+    //return as new string.
+    public String encrypt(String text) {
+        char[] texts = text.toCharArray();
+        for(int i = 0; i < texts.length; i++) {
+            char letter = texts[i];
+            if(letter >= 'a' && letter <= 'z') {
+                if(letter > 'm') {
+                    letter -= 13;
+                } else {
+                    letter += 13;
+                }
+            } else if (letter >= 'A' && letter <= 'Z') {
+                if (letter > 'M') {
+                    letter -= 13;
+                } else {
+                    letter += 13;
+                }
+            }
+            texts[i] = letter;
+        }
+
+        return new String(texts);
+    }
+
+    public String decrypt(String text) {
+        return encrypt(text);
+    }
+
+    //set s as c and return as new substring and append it.
+    //then append a subsequence of the specified charsequence to this sequence.
+    //convert to string then return.
+    public static String rotate(String s, Character c) {
+        StringBuilder string = new StringBuilder();
+        return string.append(s.substring(s.indexOf(c))).append(s, 0, s.indexOf(c)).toString();
+    }
+
+}

Crypto/src/ROT13Test.java → Crypto/src/Main/javaT/ROT13Test.java

@@ -1,6 +1,5 @@
 import org.junit.Test;
-
-import static org.junit.Assert.*;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class ROT13Test {
 

Crypto/src/ROT13.java

@@ -1,32 +0,0 @@
-import static java.lang.Character.isLowerCase;
-import static java.lang.Character.isUpperCase;
-import static java.lang.Character.toLowerCase;
-
-public class ROT13  {
-
-    ROT13(Character cs, Character cf) {
-    }
-
-    ROT13() {
-    }
-
-
-    public String crypt(String text) throws UnsupportedOperationException {
-
-        return "";
-    }
-
-    public String encrypt(String text) {
-        return text;
-    }
-
-    public String decrypt(String text) {
-        return text;
-    }
-
-    public static String rotate(String s, Character c) {
-
-        return "";
-    }
-
-}

SimpleCrypt.iml

@@ -0,0 +1,20 @@
+<?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/Main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/Crypto/src/Main/javaT" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.3.0-M1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.apiguardian:apiguardian-api:1.0.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.opentest4j:opentest4j:1.1.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.3.0-M1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+  </component>
+</module>

pom.xml

@@ -7,6 +7,20 @@
     <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>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 
 
 </project>