Developing for Jasmine Core

We welcome your contributions! Thanks for helping make Jasmine a better project for everyone. Please review the backlog and discussion lists 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. If you want to contribute but don't know what to work on, issues tagged help needed should have enough detail to get started.

General Workflow

Please submit pull requests via feature branches using the semi-standard workflow of:

git clone git@github.com:yourUserName/jasmine.git              # Clone your fork
cd jasmine                                                     # Change directory
git remote add upstream https://github.com/jasmine/jasmine.git # Assign original repository to a remote named 'upstream'
git fetch upstream                                             # Fetch changes not present in your local repository
git merge upstream/main                                      # Sync local main with upstream repository
git checkout -b my-new-feature                                 # Create your feature branch
git commit -am 'Add some feature'                              # Commit your changes
git push origin my-new-feature                                 # Push to the branch

Once you've pushed a feature branch to your forked repo, you're ready to open a pull request. We favor pull requests with very small, single commits with a single purpose.

Background

Directory Structure

/src contains all of the source files
- /src/core - generic source files
- /src/html - browser-specific files
/spec contains all of the tests
- mirrors the source directory
- there are some additional files
/lib contains the compiled copy of Jasmine. This is used to self-test and distributed as the jasmine-core Node, and Ruby packages.

Self-testing

Note that Jasmine tests itself. The files in lib are loaded first, defining the reference jasmine. Then the files in src are loaded, defining the reference jasmineUnderTest. So there are two copies of the code loaded under test.

The tests should always use jasmineUnderTest to refer to the objects and functions that are being tested. But the tests can use functions on jasmine as needed. Be careful how you structure any new test code. Copy the patterns you see in the existing code - this ensures that the code you're testing is not leaking into the jasmine reference and vice-versa.

`boot0.js` and `boot1.js`

These files file does all of the setup necessary for Jasmine to work in a browser. They load all of the code, create an Env, attach the global functions, and build the reporter. It also sets up the execution of the Env - for browsers this is in window.onload. While the default in lib is appropriate for browsers, projects may wish to customize this file.

Compatibility

Jasmine runs in both Node and browsers, including some older browsers that do not support the latest JavaScript features. See the README for the list of currently supported environments.

Development

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 depends on a browser (specifically, it expects window to be the global or document is present) should live in src/html/.

Install Dev Dependencies

Jasmine Core relies on Node.js.

To install the Node dependencies, you will need Node.js and npm.

$ npm install

...will install all of the node modules locally. Now run

$ npm test

...you should see tests run and eslint checking formatting.

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.
Write code in the style of the rest of the repo - Jasmine should look like a cohesive whole.
- Exception: Prefer const or let over var.
Ensure the entire test suite is green in all the big browsers, Node, and ESLint. 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.

Running Specs

Be sure to run the tests in at least one supported Node version and at least a couple of supported browsers. To run the tests in Node, simply use npm test as described above. To run the tests in a browser, run npm run serve and then visit http://localhost:8888.

If you have the necessary Selenium drivers installed, you can also use Jasmine's CI tooling:

$ JASMINE_BROWSER=<name of browser> node spec/support/ci.js

Before Committing or Submitting a Pull Request

Ensure all specs are green in browser and node.
Ensure eslint and prettier are clean as part of your npm test command. You can run npm run cleanup to have prettier re-write the files.
Build jasmine.js with npm run build and run all specs again - this ensures that your changes self-test well.
Revert your changes to jasmine.js and jasmine-html.js
- We do this because jasmine.js and jasmine-html.js are auto-generated (as you've seen in the previous steps) and accepting multiple pull requests when this auto-generated file changes causes lots of headaches
- When we accept your pull request, we will generate these files as a separate commit and merge the entire branch into main

Note that we use Circle CI for Continuous Integration. We only accept green pull requests.

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