如何模拟函数内的实例化类

Question

有没有办法测试实例化方法中其他对象的类方法？

例如如下：

我想在不到达数据库的情况下进行测试，所以我想模仿它。

有没有办法在下面调用myDataStoreDB静态方法之前模拟getCompetitionList，以便我的测试可以通过？

public static function getCompetitionList($TipperID)
  {
    return self::getCompList($TipperID);
  }


private static function getCompList($TipperID, $cache=false)
  {

    $cacheOps   = Array('use' => $cache, 'expire' => 3600); 
    $view       = 'dbo.getGroupsForTipper @TipperID = ?';

    $parameters = Array(
                      0 => Array('value' => $TipperID,    'count' => 1, 'type' => myMsSql::PARAM_INT)
                      );

    $ds  = new myDataStoreDB('db', 'footy');
    $rows = $ds->get($view, $parameters, $cacheOps);

    $result = array();
    $result[] = "--Select a Competition--";
    foreach($rows as $row)
    {
      $result[$row['TippingGroupID']]['competitionName'] = $row['GroupName'];
      $result[$row['TippingGroupID']]['competitionPassword'] = $row['TGPassword'];
      $result[$row['TippingGroupID']]['competitionSportsName'] = $row['SportName'];

    }

    return $result;
 }