function testRemoveMembersInScoreRange()
 {
     $leaderboard = new Leaderboard('leaderboard');
     for ($i = 1; $i <= 5; $i++) {
         $leaderboard->addMember("member_{$i}", $i);
     }
     $this->assertEquals(5, $leaderboard->totalMembers());
     $leaderboard->addMember('cheater_1', 100);
     $leaderboard->addMember('cheater_2', 101);
     $leaderboard->addMember('cheater_3', 102);
     $this->assertEquals(8, $leaderboard->totalMembers());
     $leaderboard->removeMembersInScoreRange(100, 102);
     $this->assertEquals(5, $leaderboard->totalMembers());
     $leaders = $leaderboard->leaders(1);
     foreach ($leaders as $key => $value) {
         $this->assertLessThan(100, $value['score']);
     }
 }