/** method to test setMatrix */
 public static void testSetMatrix() {
   IntArrayWorker worker = new IntArrayWorker();
   int[][] nums = {{1, 1, 1}, {2, 2, 2}};
   worker.setMatrix(nums);
   System.out.println("This should have all 1's in first row and all 2's in second");
   worker.print();
 }
 /** Method to test getTotalNested */
 public static void testGetTotalNested() {
   IntArrayWorker worker = new IntArrayWorker();
   int[][] nums2 = {{1, 2, 3}, {4, 5, 6}};
   worker.setMatrix(nums2);
   int total = worker.getTotalNested();
   System.out.println("Total should be 21 and is " + total);
 }
 /** Method to test fillPattern1 */
 public static void testFillPattern1() {
   IntArrayWorker worker = new IntArrayWorker();
   int[][] nums = new int[3][4];
   worker.setMatrix(nums);
   worker.fillPattern1();
   System.out.println("fills with 2's on diagonal, 3's to left, and 1's to right");
   worker.print();
 }
 /** Method to test getColTotal */
 public static void testGetColTotal() {
   IntArrayWorker worker = new IntArrayWorker();
   int[][] nums2 = {{1, 2, 3}, {4, 5, 6}};
   worker.setMatrix(nums2);
   int total = worker.getColTotal(0);
   System.out.println("Total for column 0 should be 5 and is " + total);
   total = worker.getColTotal(1);
   System.out.println("Total for column 1 should be 7 and is " + total);
   total = worker.getColTotal(2);
   System.out.println("Total for column 2 should be 9 and is " + total);
 }