<?php
/**
 * Orange Management
 *
 * PHP Version 7.2
 *
 * @package    TBD
 * @copyright  Dennis Eichhorn
 * @license    OMS License 1.0
 * @version    1.0.0
 * @link       http://website.orange-management.de
 */

namespace phpOMS\tests\Business\Finance;

use phpOMS\Business\Finance\Depreciation;

class DepreciationTest extends \PHPUnit\Framework\TestCase
{
    public function testStraightLine()
    {
        $start    = 23280;
        $duration = 6;
        $t        = 2;

        self::assertEquals(3880, Depreciation::getStraightLineDepreciation($start, $duration), '', 5);
        self::assertEquals(23280 - 3880 * $t, Depreciation::getStraightLineResidualInT($start, $duration, $t), '', 5);
    }

    public function testArithmeticDegressivDepreciation()
    {
        $start    = 150000;
        $residual = 18000;
        $duration = 5;
        $t        = 2;

        self::assertEquals(8800, Depreciation::getArithmeticDegressivDepreciationFactor($start, $residual, $duration), '', 5);
        self::assertEquals(35200, Depreciation::getArithmeticDegressivDepreciationInT($start, $residual,$duration, $t), '', 5);
        self::assertEquals(70800, Depreciation::getArithmeticDegressivDepreciationResidualInT($start, $residual, $duration, $t), '', 5);
    }

    public function testArithmeticProgressivDepreciation()
    {
        $start    = 40000;
        $residual = 4700;
        $duration = 4;
        $t        = 2;

        self::assertEquals(3530, Depreciation::getArithmeticProgressivDepreciationFactor($start, $residual, $duration), '', 5);
        self::assertEquals(7060, Depreciation::getArithmeticProgressivDepreciationInT($start, $residual, $duration, $t), '', 5);
        self::assertEquals(29410, Depreciation::getArithmeticProgressivDepreciationResidualInT($start, $residual, $duration, $t), '', 5);
    }

    public function testGeometicProgressivDepreciation()
    {
        $start    = 150000;
        $residual = 18000;
        $duration = 5;
        $t        = 2;

        self::assertEquals(0.3456, Depreciation::getGeometicProgressivDepreciationRate($start, $residual, $duration), '', 0.01);
        self::assertEquals(14527, Depreciation::getGeometicProgressivDepreciationInT($start, $residual, $duration, $t), '', 5);
        self::assertEquals(125965, Depreciation::getGeometicProgressivDepreciationResidualInT($start, $residual, $duration, $t), '', 5);
    }

    public function testGeometicDegressivDepreciation()
    {
        $start    = 150000;
        $residual = 18000;
        $duration = 5;
        $t        = 2;

        self::assertEquals(0.3456, Depreciation::getGeometicDegressivDepreciationRate($start, $residual, $duration), '', 0.01);
        self::assertEquals(33924, Depreciation::getGeometicDegressivDepreciationInT($start, $residual, $duration, $t), '', 5);
        self::assertEquals(64236, Depreciation::getGeometicDegressivDepreciationResidualInT($start, $residual, $duration, $t), '', 5);
    }
}
