public static void AddAtHeadDeleteAt0Test()
{
var myLinkedList = new MyDoublyLinkedList();
myLinkedList.AddAtHead(1);
myLinkedList.DeleteAtIndex(0);
myLinkedList.Value.Should().Be(-1);
myLinkedList.Next.Should().BeNull();
myLinkedList.Prev.Should().BeNull();
}
public void AddAtDifferentPlacesTest()
{
var myLinkedList = new MyDoublyLinkedList();
myLinkedList.AddAtHead(7);
myLinkedList.AddAtHead(2);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtHead(1);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtIndex(3, 0);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.DeleteAtIndex(2);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtHead(6);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtTail(4);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.Get(4).Should().Be(4);
myLinkedList.AddAtHead(4);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtIndex(5, 0);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtHead(6);
ValidateDoublyLinkedList(myLinkedList);
}
public void AddAtHeadAtTailAtIndexTest()
{
var myLinkedList = new MyDoublyLinkedList();
myLinkedList.AddAtHead(1);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtTail(3);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtIndex(1, 2); // linked list becomes 1->2->3
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.Get(1).Should().Be(2); // return 2
myLinkedList.DeleteAtIndex(1); // now the linked list is 1->3
myLinkedList.Get(1).Should().Be(3); // return 3
}
public void DeleteAtIndex0Test()
{
var myLinkedList = new MyDoublyLinkedList();
myLinkedList.AddAtHead(1);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtTail(3);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.AddAtIndex(1, 2);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.Get(1).Should().Be(2);
myLinkedList.DeleteAtIndex(0);
ValidateDoublyLinkedList(myLinkedList);
myLinkedList.Get(0).Should().Be(2);
}