@Test
public void testNormalMerge() throws Exception {
int[] first = new int[]{1, 5, 20, 40};
int[] second = new int[]{0, 9, 20};
MergeTask mt = new MergeTask(first, second);
Assert.assertArrayEquals(new int[]{0, 1, 5, 9, 20, 20, 40}, mt.call());
}
@Test(expected = NullPointerException.class)
public void testMergeWithNull() {
int[] second = new int[]{0, 9, 20};