这是一个OCUnit测试，它简单地stub了GKTurnBasedParticipant的方法playerID:#import#import"OnlineMatchTest.h"#import"OCMock.h"@implementationOnlineMatchTest-(void)setUp{GKTurnBasedParticipant*participant=[OCMockObjectmockForClass:[GKTurnBasedParticipantclass]];[[[(id)participantstub]andReturn:@"123"]playerID];}-(vo