public void Include_with_excluded_coordinate_must_extend_the_region(MapRegion originalRegion, Position position)
{
var region = originalRegion.Clone();
region.Include(position);
region.Should().NotBe(originalRegion);
region.Contains(position).Should().BeTrue("the new region should containt the included position now");
originalRegion.Contains(position).Should().BeFalse("the old region should not include the position");
}