Chicago and London TDD Styles for Functional Programming

• rescript-compiler

  93 6,436 9.5 OCaml

  The compiler for ReScript.

  

  I'm guilty of writing less Chicago style tests, and instead allowing the Elm/ReScript compilers to handle most of what a larger Chicago test suite would handle just avoid that "change all the tests later" pain.

• F#

  26 2,199 0.0 F#

  Discontinued Please file issues or pull requests here: https://github.com/dotnet/fsharp (by fsharp)

  

  FP devs differ based on language here. Elm, like F#, tends to encourage "a bunch of functions and types in a file". While Elm supports modules, we don't really care where it came from; they're all pure, all deterministic, the compiler tells us if it works.

• WorkOS

  workos.com

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  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• Elm

  198 7,446 5.4 Haskell

  Compiler for Elm, a functional language for reliable webapps.

  

  FP devs do behavioral validation in integration/e2e tests. This is where the actual side effects happen and we validate the effects of those side effects. Pure languages like Elm and Roc which have no side effects so you can't do behavioral validation in the language itself.

• Elixir

  133 23,129 9.9 Elixir

  Elixir is a dynamic, functional language for building scalable and maintainable applications

  

  This is way harder in pure, side effect languages like Haskell/Elixir/F#.

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