Testing

Keep your HTML clean; any intensive Ruby code in views is likely misplaced. Inline Ruby in views often scales into maintenance nightmares.

Rake tasks operate outside the regular Rails environment, making it a challenge to test them in isolation.

Lack of a dedicated test suite in Rails plugins and gems undermines their reliability and limits their integration into larger applications.

'Tell, Don't Ask': shigy from querying objects about their state to commanding them what to do. Keep tests clean and focused on behavior rather than implementation details.

False Positive, Integration Blind Spots, Integration Blind Spots, Interface Misuse, Refactoring Barriers...

One of the biggest issues with fixtures is their brittleness.

Scalable and DRY approach to iterative model testing in Rails. Don't loop through arrays to create test cases.