Types 'n' Testing

[smathy]

@sodapopcan

I was talking about how I’ve read the phrase: “Static types replace a whole class of tests!” so many times online but examples of are never given

I’ve seen lots of tests for typing in all different “untyped” languages (here are some examples in Rails’s ActiveRecord tests), but because it’s generally only useful where the (internal) interface is important you’ll see it almost exclusive in library code, rather than app code.