public void TestMethodRemovHead4()
{
DLLNode p = new DLLNode("1");
DLList dll = new DLList();
dll.addToHead(p);
dll.removHead();
//Before removal, list should be 1
//After, head and tail should point to null
Assert.AreEqual(true, (dll.head == null && dll.tail == null));
}//End of TestMethodRemovHead4
public void TestMethodRemovHead2()
{
DLLNode p = new DLLNode("1");
DLList dll = new DLList();
dll.addToHead(p);
p = new DLLNode("2");
dll.addToHead(p);
p = new DLLNode("3");
dll.addToHead(p);
dll.removHead();
//Before removal, order should be 3,2,1
//After, should be null -> 2 -> 1 -> null
Assert.AreEqual(true, (dll.head.previous == null && dll.head.str == "2" && dll.head.next.str == "1" && dll.head.next.next == null));
}//End of TestMethodRemovHead2
public void TestMethodRemovHead3()
{
DLLNode p = new DLLNode("1");
DLList dll = new DLList();
dll.addToHead(p);
p = new DLLNode("2");
dll.addToHead(p);
p = new DLLNode("3");
dll.addToHead(p);
dll.removHead();
//Before removal, order should be 3,2,1
//After, should be null <- 2 <- 1 <- null
Assert.AreEqual(true, (dll.tail.str == "1" && dll.tail.previous.str == "2"));
}//End of TestMethodRemovHead3
public void TestMethodRemovHead1()
{
DLLNode p = new DLLNode("1");
DLList dll = new DLList();
dll.addToHead(p);
p = new DLLNode("2");
dll.addToHead(p);
p = new DLLNode("3");
dll.addToHead(p);
dll.removHead();
//Before removal, order should be 3,2,1
//After, should be 2,1, with head.previous null, and tail.next null
Assert.AreEqual(true, (dll.head.str == "2" && dll.tail.str == "1"));
Assert.AreEqual(true, (dll.head.previous == null && dll.tail.next == null));
}//End of TestMethodRemovHead1