54 lines
1.4 KiB
PHP
54 lines
1.4 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\Tests\NeuralNetwork\Node\Neuron;
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use Phpml\NeuralNetwork\Node\Neuron;
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use Phpml\NeuralNetwork\Node\Neuron\Synapse;
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use PHPUnit\Framework\MockObject\MockObject;
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use PHPUnit\Framework\TestCase;
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class SynapseTest extends TestCase
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{
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public function testSynapseInitialization(): void
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{
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$node = $this->getNodeMock($nodeOutput = 0.5);
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$synapse = new Synapse($node, $weight = 0.75);
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self::assertEquals($node, $synapse->getNode());
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self::assertEquals($weight, $synapse->getWeight());
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self::assertEquals($weight * $nodeOutput, $synapse->getOutput());
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$synapse = new Synapse($node);
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$weight = $synapse->getWeight();
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self::assertTrue($weight === -1. || $weight === 1.);
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}
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public function testSynapseWeightChange(): void
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{
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$node = $this->getNodeMock();
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$synapse = new Synapse($node, $weight = 0.75);
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$synapse->changeWeight(1.0);
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self::assertEquals(1.75, $synapse->getWeight());
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$synapse->changeWeight(-2.0);
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self::assertEquals(-0.25, $synapse->getWeight());
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}
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/**
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* @return Neuron|MockObject
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*/
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private function getNodeMock(float $output = 1.)
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{
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$node = $this->getMockBuilder(Neuron::class)->getMock();
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$node->method('getOutput')->willReturn($output);
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return $node;
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}
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}
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