/**
*
*/
public function testDistance()
{
$p1 = new Point2d(1, 5);
$p2 = new Point2d(1, 2);
$this->assertEquals(3, $p1->distanceFrom($p2));
$p3 = new Point2d(5, 5);
$this->assertEquals(4, $p1->distanceFrom($p3));
$p4 = new Point2d(5, 1);
$this->assertEquals(5.6568542494924, $p1->distanceFrom($p4));
}
