<?php
/**
 * Jingga
 *
 * PHP Version 8.2
 *
 * @package   tests
 * @copyright Dennis Eichhorn
 * @license   OMS License 2.2
 * @version   1.0.0
 * @link      https://jingga.app
 */
declare(strict_types=1);

namespace phpOMS\tests\Business\Sales;

use phpOMS\Business\Sales\MarketShareEstimation;

/**
 * @internal
 */
#[\PHPUnit\Framework\Attributes\TestDox('phpOMS\tests\Business\Sales\MarketShareEstimationTest: Market share calculations')]
final class MarketShareEstimationTest extends \PHPUnit\Framework\TestCase
{
    #[\PHPUnit\Framework\Attributes\Group('framework')]
    #[\PHPUnit\Framework\Attributes\TestDox('The rank calculated with Zipf is correct')]
    public function testZipfRank() : void
    {
        self::assertEquals(13, MarketShareEstimation::getRankFromMarketShare(1000, 0.01));
        self::assertEquals(19, MarketShareEstimation::getRankFromMarketShare(100, 0.01));
        self::assertEquals(8, MarketShareEstimation::getRankFromMarketShare(100000, 0.01));
    }

    #[\PHPUnit\Framework\Attributes\Group('framework')]
    #[\PHPUnit\Framework\Attributes\TestDox('The market share by rank calculated with Zipf is correct')]
    public function testZipfShare() : void
    {
        self::assertTrue(\abs(0.01 - MarketShareEstimation::getMarketShareFromRank(1000, 13)) < 0.01);
        self::assertTrue(\abs(0.01 - MarketShareEstimation::getMarketShareFromRank(100, 19)) < 0.01);
        self::assertTrue(\abs(0.01 - MarketShareEstimation::getMarketShareFromRank(100000, 8)) < 0.01);
    }
}
