public function testSetGetFittestIndividual()
{
$pop = new Population(50, '12345');
$individual = new Individual();
$individual->setString('HELLO');
$pop->setIndividual(25, $individual);
$this->assertEquals('HELLO', $pop->getFittest('HELLO')->__toString());
}
public function testMutation()
{
$individual = new Individual();
$individual->setString('Jurgen Smurgen');
$individual->mutate();
$this->assertNotEquals('Jurgen Smurgen', $individual->__toString());
}