@Test
public void testStep() {
MutableArray<Integer> list = MutableArrayFromVarargs.create(1, 2, 3, 2, 1);
boolean success = step(list);
assertTrue(success);
assertEquals("(1,3,1,2,2)", list.toString());
}
@Test
public void testCannotStep() {
MutableArray<Integer> list = MutableArrayFromVarargs.create(3, 2, 1);
boolean success = step(list);
assertFalse(success);
}