lsp-test

A test framework for writing tests against Language Server Protocol servers. Language.Haskell.LSP.Test launches your server as a subprocess and allows you to simulate a session down to the wire, and Language.Haskell.LSP.Test can replay captured sessions from https://hackage.haskell.org/package/haskell-lsp. To see examples of it in action, check out haskell-ide-engine, haskell-language-server and ghcide.