@Test
public void mustGetEmptyListIfTheInputListIsEmpty() {
ReverseSinglyLinkedListIteratively reverseList = new ReverseSinglyLinkedListIteratively();
List<Integer> list = new LinkedList<Integer>();
reverseList.reverse(list);
assertEquals(list.size(), 0);
}
@Test
public void mustGetSameListIfTheInputListHasOneElement() {
ReverseSinglyLinkedListIteratively reverseList = new ReverseSinglyLinkedListIteratively();
List<Integer> list = new LinkedList<Integer>();
list.add(new Integer(1));
reverseList.reverse(list);
assertEquals(list.size(), 1);
}
@Test
public void mustGetReversedListIfTheInputListIsNotEmpty() {
ReverseSinglyLinkedListIteratively reverseList = new ReverseSinglyLinkedListIteratively();
List<Integer> list = new LinkedList<Integer>();
list.add(new Integer(1));
list.add(new Integer(3));
list.add(new Integer(2));
list.add(new Integer(6));
list.add(new Integer(7));
list.add(new Integer(10));
list.add(new Integer(5));
reverseList.reverse(list);
assertEquals(list.size(), 7);
assertEquals(list.remove(), new Integer(5));
assertEquals(list.remove(), new Integer(10));
assertEquals(list.remove(), new Integer(7));
assertEquals(list.remove(), new Integer(6));
assertEquals(list.remove(), new Integer(2));
assertEquals(list.remove(), new Integer(3));
assertEquals(list.remove(), new Integer(1));
assertEquals(list.size(), 0);
}