public void WhenTargetNodeIsHead_ShouldInsertItemsAtStart()
{
var sut = new ChainedList <int>(new List <int> {
1, 2, 4
});
sut.AddRangeBefore(sut.Head, new List <int> {
10, 11, 12
});
var first = sut.Head;
var second = first.Next;
var third = second.Next;
var fourth = third.Next;
var fifth = fourth.Next;
var sixth = fifth.Next;
Assert.AreEqual(10, first.Value);
Assert.AreEqual(11, second.Value);
Assert.AreEqual(12, third.Value);
Assert.AreEqual(1, fourth.Value);
Assert.AreEqual(2, fifth.Value);
Assert.AreEqual(4, sixth.Value);
Assert.IsNull(sixth.Next);
}
public void WhenCalled_ShouldInsertItemBeforeSpecifiedNode()
{
var sut = new ChainedList <int>(new List <int> {
1, 2, 4
});
sut.AddRangeBefore(sut.Head.Next, new List <int> {
10, 11, 12
});
var first = sut.Head;
var second = first.Next;
var third = second.Next;
var fourth = third.Next;
var fifth = fourth.Next;
var sixth = fifth.Next;
Assert.AreEqual(1, first.Value);
Assert.AreEqual(10, second.Value);
Assert.AreEqual(11, third.Value);
Assert.AreEqual(12, fourth.Value);
Assert.AreEqual(2, fifth.Value);
Assert.AreEqual(4, sixth.Value);
Assert.IsNull(sixth.Next);
}
public void WhenListIsEmpty_ShouldInsertItemsToList()
{
var sut = new ChainedList <int>();
sut.AddRangeBefore(sut.Head, new List <int> {
10, 11, 12
});
var first = sut.Head;
var second = first.Next;
var third = second.Next;
Assert.AreEqual(10, first.Value);
Assert.AreEqual(11, second.Value);
Assert.AreEqual(12, third.Value);
Assert.IsNull(third.Next);
}
