jasmine

https://github.com/jasmine/jasmine-gem

Test your JavaScript without any framework dependencies, in any environment, and with a nice descriptive syntax. Jasmine for Ruby is deprecated. We recommend using the jasmine-browser-runner NPM package instead. It supports all the same scenarios as this gem plus Webpacker. See https://jasmine.github.io/setup/browser.html for setup instructions, and https://github.com/jasmine/jasmine-gem/blob/main/release_notes/3.9.0.md for other options.