function testNullVersionReturnsNewest()
{
$client = new Services_Twilio('AC123', '123', null);
$this->assertEquals('2010-04-01', $client->getVersion());
$client = new Services_Twilio('AC123', '123', 'v1');
$this->assertEquals('2010-04-01', $client->getVersion());
$client = new Services_Twilio('AC123', '123', '2010-04-01');
$this->assertEquals('2010-04-01', $client->getVersion());
$client = new Services_Twilio('AC123', '123', '2008-08-01');
$this->assertEquals('2008-08-01', $client->getVersion());
}
