private <T> void assertIsEmpty(DoublyLinkedList<T> list) { assertNull(list.tail()); assertNull(list.head()); assertNull(list.first()); assertNull(list.last()); assertTrue(list.isEmpty()); assertEquals(0, list.size()); for (T i : list) { fail("What is this: " + i + " ?"); } }
@Test public void testAddAfter() { DoublyLinkedList<Integer> list = new DoublyLinkedList<Integer>(); list.add(1); ListNode2<Integer> node2 = list.add(2); ListNode2<Integer> node4 = list.add(4); list.addAfter(node2, 3); assertEquals(4, list.size()); assertArrayEquals(new Integer[]{1, 2, 3, 4}, list.toArray()); ListNode2<Integer> node5 = list.addAfter(node4, 5); assertEquals(5, list.size()); assertArrayEquals(new Integer[]{1, 2, 3, 4, 5}, list.toArray()); assertEquals(new Integer(5), list.last()); assertEquals(node5, list.head()); }
@Test public void testEnqueue() { DoublyLinkedList<Integer> list = new DoublyLinkedList<Integer>(); list.enqueue(1); assertFalse(list.isEmpty()); assertEquals(1, list.size()); assertArrayEquals(new Integer[]{1}, list.toArray()); list.enqueue(2); assertFalse(list.isEmpty()); assertEquals(2, list.size()); assertArrayEquals(new Integer[]{2, 1}, list.toArray()); list.enqueue(3); assertFalse(list.isEmpty()); assertEquals(3, list.size()); assertArrayEquals(new Integer[]{3, 2, 1}, list.toArray()); assertEquals(new Integer(3), list.first()); assertEquals(new Integer(1), list.last()); }
assertEquals(2, list.size()); assertEquals(node1, list.tail()); assertEquals(new Integer(3), list.last()); assertArrayEquals(new Integer[]{1, 3}, list.toArray());