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Developing for Jasmine Core

How to Contribute

We welcome your contributions - Thanks for helping make Jasmine a better project for everyone. Please review the backlog and discussion lists (the main group - and the developer's list - before starting work - what you're looking for may already have been done. If it hasn't, the community can help make your contribution better.

How to write new Jasmine code

Or, How to make a successful pull request

  • Do not change the public interface. Lots of projects depend on Jasmine and if you aren't careful you'll break them
  • Be environment agnostic - server-side developers are just as important as browser developers
  • Be browser agnostic - if you must rely on browser-specific functionality, please write it in a way that degrades gracefully
  • Write specs - Jasmine's a testing framework; don't add functionality without test-driving it
  • Ensure the entire test suite is green in all the big browsers, Node, and JSHint - your contribution shouldn't break Jasmine for other users

Follow these tips and your pull request, patch, or suggestion is much more likely to be integrated.


Ruby, RubyGems and Rake are used in order to script the various file interactions. You will need to run on a system that supports Ruby in order to run Jasmine's specs.

Node.js is used to run most of the specs (the HTML-independent code) and should be present. Additionally, the JS Hint project scrubs the source code as part of the spec process.


All source code belongs in src/. The core/ directory contains the bulk of Jasmine's functionality. This code should remain browser- and environment-agnostic. If your feature or fix cannot be, as mentioned above, please degrade gracefully. Any code that should only be in a non-browser environment should live in src/console/. Any code that depends on a browser (specifically, it expects window to be the global or document is present) should live in src/html/.

Please respect the code patterns as possible. For example, using jasmine.getGlobal() to get the global object so as to remain environment agnostic.

Running Specs

As in all good projects, the spec/ directory mirrors src/ and follows the same rules. The browser runner will include and attempt to run all specs. The node runner will exclude any html-dependent specs (those in spec/html/).

You will notice that all specs are run against the built jasmine.js instead of the component source files. This is intentional as a way to ensure that the concatenation code is working correctly.

Please ensure all specs are green before committing.

There are rake tasks to help with getting green:

  • rake spec outputs the expected number of specs that should be run and attempts to run in browser and Node
  • rake spec:browser opens spec/runner.html in the default browser on MacOS. Please run this in at least Firefox and Chrome before committing
  • rake spec:node runs all the Jasmine specs in Node.js - it will complain if Node is not installed
  • rake hint runs all the files through JSHint and will complain about potential viable issues with your code. Fix them.