public function testGetAlreadyFromJoinedTableAliasName()
 {
     $adapter = new RedBeanModelJoinTablesQueryAdapter('QueryFromModel');
     $this->assertNull($adapter->GetAlreadyFromJoinedTableAliasName('zz'));
     $alias = $adapter->addFromTableAndGetAliasName('z', 'joinid');
     $this->assertEquals($alias, $adapter->getAlreadyFromJoinedTableAliasName('z'));
 }