Honest question: what’s an example of a fully-featured web framework that makes upgrading a “large & old” application painless? In my experience, upgrading an underlying framework that a piece of complex software depends upon without breaking everything pretty much always requires time & good test coverage.
Yes, typing would obviate the need for the sorts of extensive unit testing I'm talking about here. I feel that. Luckily, the frontier LLMs (especially Claude) have gotten _really_ good at writing Rspec...
Why do many people mention the need of tests for types in dynamically typed languages?
In Rails my tests are mostly to ensure that a request to a controller returns the expected response and the expected changes in the database. Unit tests are often on validations and the errors they return for invalid data. Then there are functional tests that drive a headless browser.
