public void RemoveLast_WhenThereAreItemsMultipleItems_ShoudlRemoveLast()
{
// Arrange
var linkedList = new SinglyLinkList<string>();
linkedList.AddFirst(new SinglyLinkListNode<string>("Hello"));
linkedList.AddLast(new SinglyLinkListNode<string>("There"));
linkedList.AddLast(new SinglyLinkListNode<string>("SomeMore"));
// Act
linkedList.RemoveLast();
// Assert
Assert.AreEqual("Hello", linkedList.GetHeadAndTail().Item1.Value, "Should contain the expected value.");
Assert.AreEqual("There", linkedList.GetHeadAndTail().Item2.Value, "Should contain the expected value.");
Assert.AreEqual(linkedList.GetHeadAndTail().Item1.Next, linkedList.GetHeadAndTail().Item2, "Pointer should be correct.");
Assert.AreEqual(2, linkedList.Count, "Should contain the expected number of items.");
}
public void RemoveLast_WhenThereIsASingleItem_RemovingItShouldSetCounter()
{
// Arrange
var linkedList = new SinglyLinkList<string>();
linkedList.AddFirst(new SinglyLinkListNode<string>("hello"));
// Act
linkedList.RemoveLast();
// Assert
Assert.AreEqual(0, linkedList.Count, "There should not be any item.");
Assert.IsNull(linkedList.GetHeadAndTail().Item1, "Should be null.");
Assert.IsNull(linkedList.GetHeadAndTail().Item2, "Should be null.");
}
public void RemoveLast_WhenNoItemsInList_NothingShouldChange()
{
// Arrange
var linkedList = new SinglyLinkList<decimal>();
// Act
linkedList.RemoveLast();
// Assert
Assert.IsNull(linkedList.GetHeadAndTail().Item1, "Should be null.");
Assert.IsNull(linkedList.GetHeadAndTail().Item2, "Should be null.");
Assert.AreEqual(0, linkedList.Count, "There should not be any item.");
}
