This post confuses me a little. With my tests I try not to "reach inside" systems unless it's quite a specific integration test. Especially databases. In this case I feel like we're just... testing known PostgreSQL behavior?
Or to put another way; as others have observed, this could be solved with atomic updates and in some case SERIALIZABLE. These are right tools for balance operations - and if they’re used I’m not sure they need testing in this manner?
Or to put another way; as others have observed, this could be solved with atomic updates and in some case SERIALIZABLE. These are right tools for balance operations - and if they’re used I’m not sure they need testing in this manner?