Hi，Team:
目前我们在考虑如何模拟gorm的稳定性问题，用以针对应用的代码逻辑的测试。我们假设了如下的方式：
db := gorm.Open(...)
db = db.SetErrorFactor(0.3) //30%几率返回固定错误 gorm.ErrorDirectlyFailed
或者是否有其他的方案可以实现
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Comment From: jinzhu
Write a plugin and overwrite DB's ConnPool and return errors randomly.