The Art of Software Testing, 3rd Edition

Appendix

Sample Extreme Testing Application

1. check4Prime.java

To compile:

 &> javac check4Prime.java

To run:

 $> java -cp check4Prime 5

Right . . . 5 is a prime number!

 $> java -cp check4Prime 10

Sorry . . . 10 is NOT a prime number!

 $> java -cp check4Prime A

 Usage: check4Prime x

        - where 0<=x<=1000

Source code:

  //check4Prime.java//

  Imports

  import java.lang.*;

  public class check4Prime {

    static final int max = 1000;   // Set upper bounds.

    static final int min = 0;      // Set lower bounds

    static int input =0;           // Initialize input variable

  public static void main (String [] args) {

    //Initialize class object to work with

    check4Prime check = new check4Prime();

    try{

    //Check arguments and assign value to input variable

      check.checkArgs(args);

    //Check for Exception and display help

    }catch (Exception e){

      System.out.println("Usage: check4Prime x");

      System.out.println("-- where 0<=x<=1000");

   System.exit(1);

   }

   //Check if input is a prime number

   if (check.primeCheck(input))

      System.out.println("Right... " + input + " is a prime number!");

   else

      System.out.println("Sorry... " + input + " is NOT a prime number!");

 } //End main

 //Calculates prime numbers and compares it to the input

 public boolean primeCheck (int num){

    double sqroot = Math.sqrt(max);// Find square root of n

 //Initialize array to hold prime numbers

 boolean primeBucket [] = new boolean [max+1];

 //Initialize all elements to true, then set non-primes to false

 for (int i=2; i<=max; ...