public void WhenCalledWithPredicateAndWithEmptyList_ShouldInsertItemAtEnd()
{
var sut = new ChainedList <int>();
sut.AddBefore(node => node.Value == 1, 10);
var first = sut.Head;
Assert.AreEqual(10, first.Value);
Assert.IsNull(first.Next);
}
public void WhenCalledWithPredicate_ShouldInsertItemBeforeMatchingNode()
{
var sut = new ChainedList <int>(new List <int> {
1, 2, 4
});
sut.AddBefore(node => node.Value == 2, 10);
var first = sut.Head;
var second = first.Next;
var third = second.Next;
var fourth = third.Next;
Assert.AreEqual(1, first.Value);
Assert.AreEqual(10, second.Value);
Assert.AreEqual(2, third.Value);
Assert.AreEqual(4, fourth.Value);
Assert.IsNull(fourth.Next);
}
public void WhenCalledWithHead_ShouldInsertItemAtStart()
{
var sut = new ChainedList <int>(new List <int> {
1, 2, 4
});
sut.AddBefore(sut.Head, 10);
var first = sut.Head;
var second = first.Next;
var third = second.Next;
var fourth = third.Next;
Assert.AreEqual(10, first.Value);
Assert.AreEqual(1, second.Value);
Assert.AreEqual(2, third.Value);
Assert.AreEqual(4, fourth.Value);
Assert.IsNull(fourth.Next);
}
public void WhenCalledWithRefNodeAndWithNoMatchingNode_ShouldInsertItemAtEnd()
{
var sut = new ChainedList <int>(new List <int> {
1, 2, 4
});
var node = new ChainedNode <int>(10);
sut.AddBefore(node, 10);
var first = sut.Head;
var second = first.Next;
var third = second.Next;
var fourth = third.Next;
Assert.AreEqual(1, first.Value);
Assert.AreEqual(2, second.Value);
Assert.AreEqual(4, third.Value);
Assert.AreEqual(10, fourth.Value);
Assert.IsNull(fourth.Next);
}
