import java.util.Arrays;

class ReverserTest
{

	 private int[] testSequential(int[] a) {
		  SequentialReverser rev = new SequentialReverser(a);
		  rev.reverse();
		  boolean ok = true;
		  for (int k = 0; k < a.length; k++)
				ok = ok && (a[k] == rev.reversed()[a.length - k - 1]);
		  if (!ok)
				System.out.println("Reversal error: " + Arrays.toString(a) + " reversed: " + Arrays.toString(rev.reversed()));
		  return rev.reversed();
	 }

	 private int[] testParallel(int[] a, int N) {
		  ParallelReverser rev = new ParallelReverser(a, N);
		  rev.reverse();
		  return rev.reversed();
	 }

	 private boolean check(int[] a, int N) {
		  int[] s = testSequential(a);
		  int[] p = testParallel(a, N);
		  boolean result = Arrays.equals(s, p);
		  if (result)
				System.out.println("Test successful");
		  else
				System.out.println("Sequential reversal: " + Arrays.toString(s) + " but parallel reversal: " + Arrays.toString(p));
		  return result;
	 }

	 void test1() {
		  int[] a = {1, 2, 3, 4, 5, 6};
		  check(a, 1);
		  check(a, 2);
		  check(a, 3);
		  check(a, 5);
	 }

	 void test2() {
		  int[] a = {-1, 2, -3, 4, -5, 6, -7};
		  check(a, 3);
		  check(a, 4);
	 }

	 void test3() {
		  int[] a = { };
		  check(a, 1);
		  check(a, 2);
		  check(a, 3);
	 }

	 void test4() {
		  int[] a = { 1 };
		  check(a, 1);
		  check(a, 2);
		  check(a, 3);
	 }

	 public static void main(String[] args) {
		  ReverserTest o = new ReverserTest();
		  o.test1();
		  o.test2();
		  o.test3();
		  o.test4();
	 }
	 
}