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53 lines
1.3 KiB
PHP
53 lines
1.3 KiB
PHP
<?php
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declare (strict_types = 1);
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namespace tests\Phpml\NeuralNetwork\Node\Neuron;
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use Phpml\NeuralNetwork\Node\Neuron\Synapse;
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use Phpml\NeuralNetwork\Node\Neuron;
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class SynapseTest extends \PHPUnit_Framework_TestCase
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{
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public function testSynapseInitialization()
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{
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$node = $this->getNodeMock($nodeOutput = 0.5);
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$synapse = new Synapse($node, $weight = 0.75);
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$this->assertEquals($node, $synapse->getNode());
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$this->assertEquals($weight, $synapse->getWeight());
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$this->assertEquals($weight * $nodeOutput, $synapse->getOutput());
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$synapse = new Synapse($node);
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$this->assertInternalType('float', $synapse->getWeight());
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}
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public function testSynapseWeightChange()
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{
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$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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$this->assertEquals(1.75, $synapse->getWeight());
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$synapse->changeWeight(-2.0);
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$this->assertEquals(-0.25, $synapse->getWeight());
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}
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/**
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* @param int $output
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*
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* @return \PHPUnit_Framework_MockObject_MockObject
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*/
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private function getNodeMock($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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