public void OneValue_SetToNull()
{
var linkedList = new RemoveElementFromLinkedList.ListElement()
{
Value = 1,
Next = null
};
RemoveElementFromLinkedList.Run(ref linkedList);
linkedList.Should().BeNull();
}
public void TwoValues_FirstRemoved_SecondRemains()
{
var linkedList = new RemoveElementFromLinkedList.ListElement()
{
Value = 1,
Next = new RemoveElementFromLinkedList.ListElement()
{
Value = 2,
Next = null
}
};
RemoveElementFromLinkedList.Run(ref linkedList);
linkedList.Value.Should().Be(2);
linkedList.Next.Should().BeNull();
}
public void TwoValues_SecondRemoved_FirstRemains()
{
var secondValue = new RemoveElementFromLinkedList.ListElement()
{
Value = 2,
Next = null
};
var linkedList = new RemoveElementFromLinkedList.ListElement()
{
Value = 1,
Next = secondValue
};
RemoveElementFromLinkedList.Run(ref secondValue);
linkedList.Value.Should().Be(1);
// NOTE: The last value of the chain can't be deleted with this approach!
// This is a known issue.
// linkedList.Next.Should().BeNull();
}
public void Null_Ignored()
{
RemoveElementFromLinkedList.ListElement linkedList = null;
RemoveElementFromLinkedList.Run(ref linkedList);
linkedList.Should().BeNull();
}