public int[] TestSolution(int[] l1, int[] l2)
{
ListNode node1 = new ListNode(l1);
ListNode node2 = new ListNode(l2);
return(MergeTwoSortedLists.Solution(node1, node2).ToArray());
}
public void MergeTwoSortedListsTests()
{
var l1 = new ListNode(1, new ListNode(2, new ListNode(4)));
var l2 = new ListNode(1, new ListNode(3, new ListNode(4)));
var result = new ListNode(1,
new ListNode(1, new ListNode(2, new ListNode(3, new ListNode(4, new ListNode(4))))));
var solver = new MergeTwoSortedLists();
var res = solver.Solution(l1, l2);
Assert.AreEqual(res, result);
}