public void CoordinateCloseToTest()
{
var reference = new Coordinate(25, 35);
Assert.IsTrue(reference.CloseTo(new Coordinate(23, 37)), "Close on both X and Y");
Assert.IsFalse(reference.CloseTo(new Coordinate(22, 33)), "Close on Y only");
Assert.IsFalse(reference.CloseTo(new Coordinate(27, 38)), "Close on X only");
Assert.IsFalse(reference.CloseTo(new Coordinate(28, 32)), "Not Close");
}