public void MergeTest()
{
var heap1 = new[] { "How", "now," }.Aggregate(LeftistHeap <string> .Empty, (h, x) => LeftistHeap <string> .Insert(x, h));
var heap2 = new[] { "brown", "cow?" }.Aggregate(LeftistHeap <string> .Empty, (h, x) => LeftistHeap <string> .Insert(x, h));
var heap = LeftistHeap <string> .Merge(heap1, heap2);
Assert.AreEqual("cow?, brown, now,, How, ", DumpHeap(heap));
Assert.AreEqual("brown", LeftistHeap <string> .FindMin(heap));
}