/**
 * Tester for PrimeGenerator
 */
public class PrimeGeneratorTester
{
    public static void main(String[] args)
    {

        int limit = 1;
        PrimeGenerator gen = new PrimeGenerator(limit);
        gen.setLimit(limit);
        System.out.println("Primes < " +limit + ": " + getPrimes(gen));
        System.out.println("Expected:");

        limit = 2;
        gen.setLimit(limit);
        System.out.println("Primes < " +limit + ": " + getPrimes(gen));
        System.out.println("Expected:");

        limit = 3;
        gen.setLimit(limit);
        System.out.println("Primes < " +limit + ": " + getPrimes(gen));
        System.out.println("Expected: 2 ");

        limit = 19;
        gen.setLimit(limit);
        System.out.println("Primes < " +limit + ": " + getPrimes(gen));
        System.out.println("Expected: 2 3 5 7 11 13 17 ");

        limit = 28;
        gen.setLimit(limit);
        System.out.println("Primes < " +limit + ": " + getPrimes(gen));
        System.out.println("Expected: 2 3 5 7 11 13 17 19 23 ");

        limit = 90;
        gen.setLimit(limit);
        System.out.println("Primes < " +limit + ": " + getPrimes(gen));
        System.out.println("Expected: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 ");

        limit = 100;
        gen.setLimit(limit);
        System.out.println("Primes < " +limit + ": " + getPrimes(gen));
        System.out.println("Expected: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 ");
    }

    public static String getPrimes(PrimeGenerator gen)
    {
        String primes = "";
        int next = gen.nextPrime();

        while (next > -1)
        {
            primes = primes + next + " ";
            next = gen.nextPrime();
        }

        return primes;
    }

}