class User{
	var $db;

	function __construct(){
		$this->db = new Some_DB();
	}

	/*
	* returns true if user user owns account
	*/
	function is_user_account($user_id, $acct_id){
		$db = $this->db;

		$sql = "SELECT um_active FROM UserMaps WHERE acct_id = ? AND user_id = ?";
		$res = $db->DbGetOne($sql, array($acct_id,$user_id));

		return $res;
	}

}


function test_is_user_account(){
        $user = new User();
	$db = new MockDB();

	$db->usermaps[1][1] = 1;
        $db->usermaps[1][2] = 0;
        $db->usermaps[2][1] = 0;
        $db->usermaps[2][2] = 1;
        $db->usermaps[2][3] = 1;

	$user->db = $db;

	$has_access = $user->is_user_account(1,1);
	assertTrue($has_access);
	$has_access = $user->is_user_account(1,2);
	assertFalse($has_access);

}

class MockDB{

	function DbGetOne($sql, $params){
		$result = @$this->usermaps[$array[1]][$array[0]];
	}
}