public void FindNodeTest()
{
string[] data = { "", "abcde", "3", "4", "5", "0" };
BiDirectionalList <string> aList = new BiDirectionalList <string>(data);
BiDirectionalList <string> bList = aList.Clone();
SingleLinkedList <string> list1 = new SingleLinkedList <string>(data);
SingleLinkedList <string> list2 = aList.Clone();
Assert.AreEqual(list1.ToString(), list2.ToString());
Assert.AreEqual(list1.FindNode("3").Value, "3");
string[] array = aList.ToArray();
string ssArray = aList.ToString();
Assert.AreEqual(String.Join(", ", array), String.Join(", ", bList.ToString()));
Assert.AreEqual(String.Join(", ", array), String.Join(", ", data));
Assert.AreEqual(String.Join(", ", array), ssArray);
Node <string> node1 = aList.FindNode("abcde");
Assert.AreEqual(aList.FindNode(node1).Value, "abcde");
Assert.AreEqual(aList.FindNode("3").Value, "3");
Assert.AreEqual(aList.FindNode(3).Value, "4");
Assert.AreEqual(aList.FindNode(2).Value, aList.FindNode(-4).Value);
Assert.AreEqual(aList.FindNode(5).Value, aList.FindNode(-1).Value);
Assert.AreNotEqual(aList.FindNode(0).Value, "0");
Assert.IsNotNull(aList.FindNode(-6));
Assert.IsNull(aList.FindNode(6));
Assert.IsNull(aList.FindNodeBackward(6));
Assert.IsNull(aList.FindNode(-7));
Node <string> node2 = new Node <string>("abc");
Assert.IsNull(aList.FindNode(node2));
Node <string> node3 = aList.InsertNode(node2.Value, 2);
Assert.AreEqual(node2, node3);
Assert.IsNotNull(node3);
Assert.IsNotNull(aList.AddNode(node2, aList.Last));
Assert.AreEqual(node2, aList.Last);
Node <string> node4 = aList.FindNodeBackward(4);
Assert.AreEqual(node4.Value, "3");
Node <string> node5 = aList.FindNodeBackward(5);
Node <string> test5 = aList.FindNode(aList.Count - 5 - 1);
Assert.AreEqual(node5.Value, test5.Value);
aList.InsertNode(node1, node1);
Assert.AreEqual(node1.Value, aList.Head.Next.Value);
}
public void ReverseTest1()
{
string abc = "abc";
string xyz = "xyz";
string test1 = "test1";
string test2 = "test2";
string test3 = "test3";
string test4 = "test4";
Node <String> newNode = null;
BiDirectionalList <String> myList = new BiDirectionalList <String>();
Assert.AreEqual(myList.Count, 0);
// testing empty list
Assert.IsNull(myList.Current);
Assert.IsNull(myList.Head);
Assert.IsNull(myList.Last);
myList.Reverse();
Assert.AreEqual(myList.Count, 0);
// testing linked list with only one node
newNode = myList.AddNode(test1);
Assert.AreEqual(myList.Count, 1);
Assert.AreEqual(myList.Head, newNode);
Assert.AreEqual(myList.Last, myList.Current);
Assert.AreEqual(myList.Head, myList.Current);
myList.Reverse();
Assert.AreEqual(myList.Count, 1);
Assert.AreEqual(myList.Last, myList.Last);
// reinitializing a new linked list
myList = new BiDirectionalList <String>(test1);
Assert.AreEqual(myList.Count, 1);
newNode = myList.AddNode(test2);
Assert.AreEqual(myList.Count, 2);
Assert.AreEqual(myList.Last, newNode);
Assert.AreNotEqual(myList.Head, newNode);
newNode = myList.AddNode(test3);
Assert.AreEqual(myList.Last, newNode);
Assert.AreEqual(myList.Current.Value.ToString(), test3.ToString());
Assert.AreNotEqual(myList.Head, newNode);
newNode = myList.AddNode(abc);
Assert.AreEqual(myList.Count, 4);
Assert.AreEqual(myList.Last, newNode);
Assert.AreNotEqual(myList.Head, newNode);
newNode = myList.AddNode(xyz);
Assert.AreEqual(myList.Count, 5);
Assert.AreEqual(myList.Last, newNode);
Assert.AreEqual(myList.Current, myList.Last);
Assert.AreNotEqual(myList.Head, newNode);
// searching in linked list
Assert.AreEqual(myList.Head, myList.FindNode(0));
Assert.AreEqual(myList.Head, myList.FindNode(test1));
Assert.AreEqual(myList.Last, myList.FindNode(xyz));
Assert.AreEqual(myList.Last, myList.FindNode(myList.Count - 1));
Assert.AreNotEqual(myList.Last, myList.FindNode(myList.Head));
myList.Last.Previous.Value = test4;
Assert.AreEqual(myList.FindNode(3), myList.FindNode(test4));
Assert.AreEqual(myList.FindNode(-2), myList.FindNode(test4));
Assert.AreEqual(myList.FindNode(-1), myList.FindNode(xyz));
Assert.AreEqual(myList.FindNode(-1), myList.Last);
Assert.AreEqual(myList.FindNode(0), myList.Head);
Assert.AreEqual(myList.Current, myList.Head);
Assert.IsNull(myList.FindNode(abc));
Assert.AreEqual(myList.Current, myList.Head);
// saving original linked list
Node <String> node_old = myList.Head;
Node <String> node_nul = null;
object[] original_list = myList.ToArray();
Assert.IsNotNull(node_old);
Assert.AreEqual(myList.Current.CompareTo(node_nul), 1);
Assert.AreEqual(myList.Count, 5);
object head = myList.Head.Value;
object last = myList.Last.Value;
myList.Reverse();
Assert.AreEqual(myList.Current, myList.Last);
Assert.AreEqual(myList.Head.Value.ToString(), last.ToString());
Assert.AreEqual(myList.Last.Value.ToString(), head.ToString());
Assert.AreEqual(myList.Last.Previous.Value.ToString(), test2);
Assert.AreEqual(myList.Last.Previous.Previous.Value.ToString(), test3);
Assert.AreEqual(myList.Head.Next.Next.Value.ToString(), test3);
newNode = myList.Head;
for (int n = original_list.Length - 1; n >= 0; n--)
{
Assert.AreEqual(original_list[n], newNode.Value);
newNode = newNode.Next;
}
Node <String> node_new = myList.Last;
Assert.IsNotNull(node_new);
while (node_old != null)
{
Assert.AreEqual(node_old, node_new);
node_new = node_new.Previous;
node_old = node_old.Next;
}
}