public void Link_ThreeTiles_LinkedRefsAreCorrect()
{
var engine = new DominoTileEntity(12, 12, true);
var tileOne = new DominoTileEntity(12, 11);
var tileTwo = new DominoTileEntity(11, 10);
tileOne.Link(engine);
tileTwo.Link(tileOne);
Assert.True(tileOne.IsLinked(engine));
Assert.True(tileTwo.IsLinked(tileOne));
Assert.Equal("FullyLinkedState", tileOne.GetStateType().Name);
Assert.Equal("HalfLinkedState", tileTwo.GetStateType().Name);
Assert.Equal(1, tileTwo.GetUnlinkedValues().Count());
Assert.Equal(10, tileTwo.GetUnlinkedValues().First());
}