public function testNeuronRefresh()
{
$neuron = new Neuron();
$neuron->getOutput();
$neuron->addSynapse($this->getSynapseMock());
$this->assertEquals(0.5, $neuron->getOutput(), '', 0.01);
$neuron->refresh();
$this->assertEquals(0.88, $neuron->getOutput(), '', 0.01);
}