Multiple asserts are fine, multiple aspects in a single test are not. For example like a transaction test that checks if account balance is ok and if an user ge

Multiple asserts are fine, multiple aspects in a single test are not. For example like a transaction test that checks if account balance is ok and if an user gets a notification. It boils down to a single responsibility, so when there are multiple aspects then it means that the class/interface should be refactored.