function testAddStructToStruct()
{
$v = new xmlrpcval(array('a' => new xmlrpcval('b')), 'struct');
$r = $v->addstruct(array('b' => new xmlrpcval('c')));
$this->assertEquals(2, $v->structsize());
$r = $v->addstruct(array('b' => new xmlrpcval('b')));
$this->assertEquals(2, $v->structsize());
}