public function testGateway_VersionDefaultsToTwo()
{
$gateway = new Braintree\Gateway(array('environment' => 'development', 'merchantId' => 'integration_merchant_id', 'publicKey' => 'integration_public_key', 'privateKey' => 'integration_private_key'));
$encodedClientToken = $gateway->clientToken()->generate();
$clientToken = base64_decode($encodedClientToken);
$version = json_decode($clientToken)->version;
$this->assertEquals(2, $version);
}