public void SetTile(int x, int y)
{
var position = new Vector(x, y);
var tile = new Tile();
var extent = Mock.Of <Extent>(e => e.SetTile(position, tile));
var wrappedExtent = new WrappedExtent(extent);
Assert.That(wrappedExtent.SetTile(position, tile));
Mock.Get(extent).Verify(e => e.SetTile(position, tile), Times.Once);
}
