public function testGetPointbyCoordinates()
{
$point = new Point(6, 7);
$pointCollection = new PointCollection([$point]);
$actialPoint = $pointCollection->getPointByCoordinates(6, 7);
$this->assertSame($point, $actialPoint);
$this->assertNull($pointCollection->getPointByCoordinates(2, 2));
}
