submission

Crypto/Crypto.iml

@@ -7,12 +7,23 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Arquillian JUnit:Release" level="project" />
     <orderEntry type="module-library">
-      <library name="JUnit4">
+      <library name="JUnit5.0">
         <CLASSES>
-          <root url="jar://$APPLICATION_HOME_DIR$/lib/junit-4.12.jar!/" />
-          <root url="jar://$APPLICATION_HOME_DIR$/lib/hamcrest-core-1.3.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.0.0/junit-jupiter-api-5.0.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.0.0/apiguardian-api-1.0.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.0.0/opentest4j-1.0.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.0.0/junit-platform-commons-1.0.0.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+    <orderEntry type="module-library">
+      <library name="testng">
+        <CLASSES>
+          <root url="jar://$APPLICATION_HOME_DIR$/plugins/testng/lib/testng.jar!/" />
+          <root url="jar://$APPLICATION_HOME_DIR$/plugins/testng/lib/jcommander.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES />

Crypto/src/ROT13.java

@@ -13,20 +13,54 @@ public class ROT13  {
 
     public String crypt(String text) throws UnsupportedOperationException {
 
-        return "";
+        return encrypt(text);
     }
 
     public String encrypt(String text) {
-        return text;
+        StringBuilder stringBuilder = new StringBuilder();
+
+        for (int i = 0; i < text.length(); i++) {
+            if(!Character.isLetter(text.charAt(i))){
+                stringBuilder.append(text.charAt(i));
+            } else if (Character.isLowerCase(text.charAt(i))) {
+                stringBuilder.append(rotateLowerCase(text.charAt(i)));
+            } else { stringBuilder.append(rotateUpperCase(text.charAt(i)));}
+        }
+        System.out.println(stringBuilder.toString());
+        return stringBuilder.toString();
     }
 
     public String decrypt(String text) {
-        return text;
+        return encrypt(text);
     }
 
     public static String rotate(String s, Character c) {
+        int indexToStart = 0;
+        for(int i = 0; i < s.length(); i++){
+            if(s.charAt(i) == c){
+                indexToStart = i;
+            }
+        }
+        return createNewString(s, indexToStart);
+    }
 
-        return "";
+    private static String createNewString(String s, int indexToStart) {
+        StringBuilder stringBuilder = new StringBuilder(s.substring(indexToStart));
+        stringBuilder.append(s.substring(0, indexToStart));
+        return stringBuilder.toString();
     }
 
+    public static char rotateUpperCase(char c){
+            if (c + 13 <= 90){
+                return (char) (c + 13);
+            }
+        return (char) (c - 13);
+    }
+
+    public static char rotateLowerCase(char c){
+        if (c + 13 <= 122){
+            return (char) (c + 13);
+        }
+        return (char) (c - 13);
+    }
 }

Crypto/src/ROT13Test.java

@@ -1,6 +1,6 @@
-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

@@ -0,0 +1,12 @@
+<?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://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>