/** * */ 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)); }