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79 lines
2.5 KiB
PHP
Executable File
79 lines
2.5 KiB
PHP
Executable File
<?php
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/**
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* Jingga
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*
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* PHP Version 8.2
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*
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* @package tests
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* @copyright Dennis Eichhorn
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* @license OMS License 2.0
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* @version 1.0.0
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* @link https://jingga.app
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*/
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declare(strict_types=1);
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namespace phpOMS\tests\Math\Stochastic\Distribution;
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use phpOMS\Math\Stochastic\Distribution\TDistribution;
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/**
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* @internal
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*/
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#[\PHPUnit\Framework\Attributes\CoversClass(\phpOMS\Math\Stochastic\Distribution\TDistribution::class)]
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final class TDistributionTest extends \PHPUnit\Framework\TestCase
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{
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#[\PHPUnit\Framework\Attributes\Group('framework')]
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public function testMean() : void
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{
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self::assertEquals(0, TDistribution::getMean());
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}
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#[\PHPUnit\Framework\Attributes\Group('framework')]
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public function testMedian() : void
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{
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self::assertEquals(0, TDistribution::getMedian());
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}
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#[\PHPUnit\Framework\Attributes\Group('framework')]
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public function testMode() : void
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{
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self::assertEquals(0, TDistribution::getMode());
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}
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#[\PHPUnit\Framework\Attributes\Group('framework')]
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public function testVariance() : void
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{
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self::assertEqualsWithDelta(5 / 3, TDistribution::getVariance(5), 0.001);
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self::assertEqualsWithDelta(\PHP_FLOAT_MAX, TDistribution::getVariance(2), 0.001);
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}
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#[\PHPUnit\Framework\Attributes\Group('framework')]
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public function testStandardDeviation() : void
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{
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self::assertEqualsWithDelta(\sqrt(5 / 3), TDistribution::getStandardDeviation(5), 0.001);
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self::assertEqualsWithDelta(\PHP_FLOAT_MAX, TDistribution::getStandardDeviation(2), 0.001);
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}
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#[\PHPUnit\Framework\Attributes\Group('framework')]
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public function testExKurtosis() : void
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{
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self::assertEqualsWithDelta(6, TDistribution::getExKurtosis(5), 0.001);
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self::assertEqualsWithDelta(\PHP_FLOAT_MAX, TDistribution::getExKurtosis(3), 0.001);
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}
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#[\PHPUnit\Framework\Attributes\Group('framework')]
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public function testSkewness() : void
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{
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self::assertEquals(0, TDistribution::getSkewness());
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}
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#[\PHPUnit\Framework\Attributes\Group('framework')]
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public function testCdf() : void
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{
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self::assertEqualsWithDelta(0.0, TDistribution::getCdf(1.25, 5, 0), 0.001);
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self::assertEqualsWithDelta(0.86669, TDistribution::getCdf(1.25, 5, 1), 0.001);
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self::assertEqualsWithDelta(0.78867, TDistribution::getCdf(1.0, 2, 1), 0.001);
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self::assertEqualsWithDelta(0.4226, TDistribution::getCdf(1.0, 2, 2), 0.001);
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}
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}
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