67 lines
1.9 KiB
PHP
67 lines
1.9 KiB
PHP
<?php
|
|
|
|
declare(strict_types=1);
|
|
|
|
namespace Phpml\Tests\NeuralNetwork\Node;
|
|
|
|
use Phpml\NeuralNetwork\ActivationFunction\BinaryStep;
|
|
use Phpml\NeuralNetwork\Node\Neuron;
|
|
use Phpml\NeuralNetwork\Node\Neuron\Synapse;
|
|
use PHPUnit\Framework\MockObject\MockObject;
|
|
use PHPUnit\Framework\TestCase;
|
|
|
|
class NeuronTest extends TestCase
|
|
{
|
|
public function testNeuronInitialization(): void
|
|
{
|
|
$neuron = new Neuron();
|
|
|
|
self::assertEquals([], $neuron->getSynapses());
|
|
self::assertEquals(0.5, $neuron->getOutput());
|
|
}
|
|
|
|
public function testNeuronActivationFunction(): void
|
|
{
|
|
/** @var BinaryStep|MockObject $activationFunction */
|
|
$activationFunction = $this->getMockBuilder(BinaryStep::class)->getMock();
|
|
$activationFunction->method('compute')->with(0)->willReturn($output = 0.69);
|
|
|
|
$neuron = new Neuron($activationFunction);
|
|
|
|
self::assertEquals($output, $neuron->getOutput());
|
|
}
|
|
|
|
public function testNeuronWithSynapse(): void
|
|
{
|
|
$neuron = new Neuron();
|
|
$neuron->addSynapse($synapse = $this->getSynapseMock());
|
|
|
|
self::assertEquals([$synapse], $neuron->getSynapses());
|
|
self::assertEqualsWithDelta(0.88, $neuron->getOutput(), 0.01);
|
|
}
|
|
|
|
public function testNeuronRefresh(): void
|
|
{
|
|
$neuron = new Neuron();
|
|
$neuron->getOutput();
|
|
$neuron->addSynapse($this->getSynapseMock());
|
|
|
|
self::assertEqualsWithDelta(0.5, $neuron->getOutput(), 0.01);
|
|
|
|
$neuron->reset();
|
|
|
|
self::assertEqualsWithDelta(0.88, $neuron->getOutput(), 0.01);
|
|
}
|
|
|
|
/**
|
|
* @return Synapse|MockObject
|
|
*/
|
|
private function getSynapseMock(float $output = 2.)
|
|
{
|
|
$synapse = $this->getMockBuilder(Synapse::class)->disableOriginalConstructor()->getMock();
|
|
$synapse->method('getOutput')->willReturn($output);
|
|
|
|
return $synapse;
|
|
}
|
|
}
|