function testMergeWithGuardedProps()
{
$ds = new lmbSet(array('test' => 'value'));
$ds->_test = 100;
$ds->merge(array('foo' => 'bar', '_test' => 10));
$this->assertEqual($ds->getPropertyList(), array('test', 'foo'));
$this->assertEqual($ds->get('test'), 'value');
$this->assertEqual($ds->get('foo'), 'bar');
$this->assertEqual($ds->_test, 100);
}
