testing atbash cipher

src/main/java/AtbashCipher.java

 import java.io.*;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.util.ArrayList;
+
 import java.util.HashMap;
-import java.util.stream.IntStream;
 import java.util.stream.Stream;
 
+
 public class AtbashCipher{
 
     private static final String abc = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz";
         for (int i = 0; i < abcArr.length; i++) {
             key.put(abcArr[i], cbaArr[i]);
         }
-
     }
 
     public static String cipher(String s) {
                 charArray[i] = key.get(charArray[i]);
             }
         }
-
         return charArrayToString(charArray);
     }
 
-    public static char swap(char c) {
-        return key.get(c);
-    }
-
-    public static String charArrayToString(char[] chars) {
+    public  static String charArrayToString(char[] chars) {
         StringBuilder sb = new StringBuilder();
         for (char c: chars) {
             sb.append(c);
         return sb.toString();
     }
 
-    public void cipherFile(String filePath) throws FileNotFoundException {
+    public void cipherFile(String filePathIn, String filePathOut) throws FileNotFoundException {
+        String inFile = fileToString(filePathIn);
 
-        String ourFile = fileToString(filePath);
-
-        ArrayList<Character> charStream = ourFile.chars()
-                .mapToObj(c -> (char) c)
-                .forEach(AtbashCipher::swap)
-
-
-
-//        char[] ciphered = Stream.of(ourFile)
-//                .forEach(AtbashCipher::swap);
+        PrintStream file = new PrintStream(new File(filePathOut));
+        PrintStream console = System.out;
 
+        System.setOut(file);
 
+        String swappedChars = Stream.of(inFile)
+                .map(AtbashCipher::cipher)
+                .reduce("", String::concat);
 
+        System.out.println(swappedChars);
+        System.setOut(console);
     }
 
+
     private String fileToString(String filePath) throws FileNotFoundException {
 
-        FileReader fReader = new FileReader(filePath);
+        File file = new File(filePath);
+
+        FileReader fReader = new FileReader(file);
         BufferedReader bufferedReader = new BufferedReader(fReader);
 
         StringBuilder sb = new StringBuilder();

src/test/java/AtbashCipherTest.java

 import org.junit.Assert;
 import org.junit.Test;
 
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+
 import static org.junit.Assert.*;
 
 public class AtbashCipherTest {
 
         Assert.assertEquals(exp, actual);
     }
+
+    @Test
+    public void testFiles() throws FileNotFoundException {
+
+        AtbashCipher cipher = new AtbashCipher();
+
+        String inputFile = "sonnet18.txt";
+        String outputTest = "testFileOutput.txt";
+        String decryptTest = "decryptedTestFile.txt";
+
+        cipher.cipherFile(inputFile, outputTest);
+        cipher.cipherFile(outputTest, decryptTest);
+
+        FileReader fReader = new FileReader(inputFile);
+        BufferedReader bufferedReader = new BufferedReader(fReader);
+
+
+    }
 }