php-ml/tests/NeuralNetwork/ActivationFunction/GaussianTest.php
Marcin Michalski db82afa263 Update to phpunit 8 and bump min php to 7.2 (#367)
* Update to phpunit 8

* Require at least PHP 7.2
2019-04-10 20:42:59 +02:00

60 lines
1.3 KiB
PHP

<?php
declare(strict_types=1);
namespace Phpml\Tests\NeuralNetwork\ActivationFunction;
use Phpml\NeuralNetwork\ActivationFunction\Gaussian;
use PHPUnit\Framework\TestCase;
class GaussianTest extends TestCase
{
/**
* @dataProvider gaussianProvider
*
* @param float|int $value
*/
public function testGaussianActivationFunction(float $expected, $value): void
{
$gaussian = new Gaussian();
self::assertEqualsWithDelta($expected, $gaussian->compute($value), 0.001);
}
public function gaussianProvider(): array
{
return [
[0.367, 1],
[1, 0],
[0.367, -1],
[0, 3],
[0, -3],
];
}
/**
* @dataProvider gaussianDerivativeProvider
*
* @param float|int $value
*/
public function testGaussianDerivative(float $expected, $value): void
{
$gaussian = new Gaussian();
$activatedValue = $gaussian->compute($value);
self::assertEqualsWithDelta($expected, $gaussian->differentiate($value, $activatedValue), 0.001);
}
public function gaussianDerivativeProvider(): array
{
return [
[0, -5],
[0.735, -1],
[0.779, -0.5],
[0, 0],
[-0.779, 0.5],
[-0.735, 1],
[0, 5],
];
}
}