Sibyx/phpGPX

<?php
/**
 * @author            Jakub Dubec <jakub.dubec@gmail.com>
 */

namespace UnitTests\phpGPX\Helpers;

use phpGPX\Helpers\GeoHelper;
use phpGPX\Models\Point;
use PHPUnit\Framework\TestCase;

class GeoHelperTest extends TestCase
{

    /**
     * Tested with https://www.freemaptools.com/measure-distance.htm
     *
     * Input points:
     *  - 48.1573923225717 17.0547121910204
     *  - 48.1644916381763 17.0591753907502
     */
    public function testGetDistance()
    {
        $point1 = new Point(Point::WAYPOINT);
        $point1->latitude = 48.1573923225717;
        $point1->longitude = 17.0547121910204;

        $point2 = new Point(Point::WAYPOINT);
        $point2->latitude = 48.1644916381763;
        $point2->longitude = 17.0591753907502;

        $this->assertEqualsWithDelta(
            856.97,
            GeoHelper::getRawDistance($point1, $point2),
            1,
            "Invalid distance between two points!"
        );
    }

    /**
     * @link http://cosinekitty.com/compass.html
     */
    public function testRealDistance()
    {
        $point1 = new Point(Point::WAYPOINT);
        $point1->latitude = 48.1573923225717;
        $point1->longitude = 17.0547121910204;
        $point1->elevation = 100;

        $point2 = new Point(Point::WAYPOINT);
        $point2->latitude = 48.1644916381763;
        $point2->longitude = 17.0591753907502;
        $point2->elevation = 200;

        $this->assertEqualsWithDelta(
            856.97,
            GeoHelper::getRawDistance($point1, $point2),
            1,
            "Invalid distance between two points!"
        );

        $this->assertEqualsWithDelta(
            862,
            GeoHelper::getRealDistance($point1, $point2),
            1,
            "Invalid real distance between two points!"
        );
    }
}