jasmine-core

https://github.com/jasmine/jasmine

Test your JavaScript without any framework dependencies, in any environment, and with a nice descriptive syntax. Jasmine for Ruby is deprecated. The direct replacment for the jasmine-core gem is the jasmine-core NPM package. If you are also using the jasmine gem, we recommend using the jasmine-browser-runner NPM package instead. It supports all the same scenarios as the jasmine gem 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.