How would I write/implement code into the testing of my code way below? My testing code is directly below this but it's unfinished because I'm a little lost on what to do. It's a caesar cipher, so what I need to do is show my output and finish my testing cases.

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what I have for testing below

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import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Scanner; /** This program encrypts a file, using the Caesar cipher. */ public class CipherTest { public static void main(String[] args) { Scanner in = new Scanner(System.in); try { System.out.print("Input file: "); String inFile = in.next(); System.out.print("Output file: "); String outFile = in.next(); System.out.print("Encryption key: "); int key = in.nextInt(); InputStream inStream = new FileInputStream(inFile); OutputStream outStream = new FileOutputStream(outFile); Cipher cipher = new Cipher(key); cipher.encryptStream(inStream, outStream); inStream.close(); outStream.close(); } catch (IOException exception) { System.out.println("Error processing file: " + exception); } } } 

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My code below

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import java.io.InputStream;

import java.io.OutputStream;

import java.io.IOException;

/**

* This class encrypts files using the substitution ciphers

*/

public class Cipher {

private String secret;

/**

* Constructs a cipher object with a given secret key.

*

* @param aKey

* the encryption key

*/

public Cipher(String secret) {

this.secret = secret.toUpperCase();

}

/**

* Encrypts the contents of a stream.

*

* @param in

* the input stream

* @param out

* the output stream

*/

public void encryptStream(InputStream in, OutputStream out)

throws IOException {

boolean done = false;

while (!done) {

int next = in.read();

if (next == -1)

done = true;

else {

char b = (char) next;

char c = encrypt(b);

out.write(c);

}

}

}

/**

* Decrypts the contents of a stream.

*

* @param in

* the input stream

* @param out

* the output stream

*/

public void decryptStream(InputStream in, OutputStream out)

throws IOException {

boolean done = false;

while (!done) {

int next = in.read();

if (next == -1)

done = true;

else {

char b = (char) next;

char c = encrypt(b);

out.write(c);

}

}

}

/**

* Encrypts a char.

*

* @param b

* the char to encrypt

* @return the encrypted char

*/

public char encrypt(char c) {

if (Character.isUpperCase(c))

return Character.toUpperCase(secret.charAt(c - 'A'));

if (Character.isLowerCase(c))

return Character.toLowerCase(secret.charAt(c - 'a'));

return c;

}

/**

* Decrypts a char.

*

* @param b

* the char to encrypt

* @return the Decrypted char

*/

public char decrypt(char c) {

if (Character.isUpperCase(c))

return (char) ('A' + secret.indexOf(Character.toUpperCase(c)));

if (Character.isLowerCase(c))

return (char) ('a' + secret.indexOf(Character.toUpperCase(c)));

return c;

}

public static void main(String args[]) throws IOException {

Cipher cipher = new Cipher("FEATHRZYXWVUSQPONMLKJIGDCB");

cipher.encryptStream(System.in, System.out);

}

}