public function testGetSetVersion()
{
$this->assertNotNull($this->paymentGateway->getVersion());
$value = '3.2';
$this->paymentGateway->setVersion($value);
$this->assertEquals($value, $this->paymentGateway->getVersion());
$config = array('version' => '3.2');
$gateway = new PaymentGateway($config);
$this->assertEquals($config['version'], $gateway->getVersion());
}