public void RemoveFirstThrowError()
{
var dll = new DoublyLinkList <int>();
var ex = Assert.Throws <InvalidOperationException>(() => dll.RemoveFirst());
Assert.Equal("There are no elements to be removed!", ex.Message);
}
public void NodeIsNullShouldThrowException()
{
var dll = new DoublyLinkList <int>();
Node <int> n = null;
var ex = Assert.Throws <ArgumentNullException>(() => dll.AddBefore(n, 6));
Assert.Equal("Value cannot be null. (Parameter 'node')", ex.Message);
}
public void RemoveFirst()
{
var dll = new DoublyLinkList <int>();
// 100 150 56
Node <int> node = new Node <int>(100);
dll.AddFirst(node);
dll.AddAfter(node, 150);
dll.AddLast(56);
dll.RemoveFirst();
Assert.Equal(2, dll.Count);
}
public void AddAfter()
{
var dll = new DoublyLinkList <int>();
Node <int> node = new Node <int>(100);
var newNode = new Node <int>(8);
dll.AddFirst(node);
dll.AddLast(56);
dll.AddAfter(node, newNode);
int count = dll.Count;
Assert.Equal(3, count);
}
public void AddLastAndBefore()
{
var dll = new DoublyLinkList <int>();
Node <int> node = new Node <int>(15);
var newNode = new Node <int>(8);
dll.AddLast(52);
dll.AddLast(3);
dll.AddLast(node);
dll.AddBefore(node, newNode);
int count = dll.Count;
Assert.Equal(4, count);
}
public void CopyTo()
{
var dll = new DoublyLinkList <int>();
// 100 150 56
Node <int> node = new Node <int>(100);
dll.AddFirst(node);
dll.AddAfter(node, 150);
dll.AddLast(56);
int[] arr = new int[4];
dll.CopyTo(arr, 0);
Assert.Equal(100, arr[0]);
Assert.Equal(56, arr[2]);
}
public void AddFirst()
{
var dll = new DoublyLinkList <int>();
Node <int> node = new Node <int>(15);
var newNode = new Node <int>(8);
dll.AddLast(node);
dll.AddBefore(node, newNode);
dll.AddBefore(newNode, 9);
dll.AddLast(11);
dll.AddFirst(100);
int count = dll.Count;
Assert.Equal(5, count);
}
public void FindLastNode()
{
var dll = new DoublyLinkList <int>();
//100 8 56
Node <int> node = new Node <int>(100);
Node <int> lastnode = new Node <int>(56);
var newNode = new Node <int>(8);
dll.AddFirst(node);
dll.AddLast(lastnode);
dll.AddAfter(node, newNode);
var find = dll.FindLast(56);
var findIsNull = dll.FindLast(100);
Assert.Equal(lastnode, find);
Assert.Null(findIsNull);
}
public void RemoveBool()
{
var dll = new DoublyLinkList <int>();
Node <int> node = new Node <int>(100);
var newNode = new Node <int>(8);
var newNode2 = new Node <int>(82);
dll.AddFirst(node);
dll.AddLast(56);
dll.AddAfter(node, newNode);
dll.AddAfter(newNode, newNode2);
bool remove = dll.Remove(100);
bool removeFalse = dll.Remove(589);
int count = dll.Count;
Assert.True(remove);
Assert.False(removeFalse);
}
public void FindANode()
{
var dll = new DoublyLinkList <int>();
//100 8 56
Node <int> node = new Node <int>(100);
var newNode = new Node <int>(8);
dll.AddFirst(node);
dll.AddLast(56);
dll.AddAfter(node, newNode);
var find = dll.Find(8);
var find2 = dll.Find(68);
int count = dll.Count;
Assert.Equal(3, count);
Assert.Equal(newNode, find);
Assert.Null(find2);
}
