public function testExceptionIsThrownWhenMasterAliasDoesntExist()
{
$this->setExpectedException(InvalidArgumentException::class);
$client = ClientBuilder::create()->addConnection('default', 'http://localhost:7474')->addConnection('conn2', 'http://localhost:7575')->addConnection('conn3', 'http://localhost:7676')->setMaster('conn5')->build();
}