rescript-jest VS rescript-sublime

Another popular option is to use bindings for Jest. However, in my opinion, Jest is a monstrous combine that is slow, has a hacky mock system, bad ESM support, and purely tries to mimic DOM API with JSDOM. AVA literally doesn't have any of these. Also, the available Jest bindings don't allow doing multiple assertions per test, which is often useful to me.

In order to write tests in ReScript, and thus test your code directly, you can use bs-jest, which provides ReScript bindings to Jest. If you prefer, you can also use the slightly less mature bs-mocha. You can also test the generated JavaScript or TypeScript files with no extra configuration.

ReScript devs did well on prioritizing the plugin for VSCode, which works really well. With the ReScript’s watcher running, you’ll see your Type errors underlined in red, with a descriptive bubble on hover. You also get type hints, formatting, and jumps to definitions. There’s also official support for Vim (both plain Vim and Coc Language Server) and Sublime.