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CONTRIBUTING.md

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Version License

Contributing

Please note we have a code of conduct, please follow it in all your interactions with the project.

Sending a Pull Request

The core team is monitoring for pull requests. We will review your pull request and either merge it, request changes to it, or close it with an explanation.

Before submitting a pull request, please make sure the following is done:

  1. Fork the repository and create your branch from main.
  2. Run yarn in the repository root.
  3. If you’ve fixed a bug or added code that should be tested, add tests!
  4. Ensure the test suite passes (yarn build && yarn test).

Developing locally

During the process of developing the library locally we first have to check out the repository and create a branch from main.

git clone https://github.com/hotwired/turbo.git
cd turbo
yarn
git checkout -b '<your_branch_name>'

Once you are done developing the feature or bug fix you have 2 options:

  1. Run the test suite
  2. Run a local webserver and checkout your changes manually

Testing

The library is tested by running the test suite (found in: src/tests/*) against headless browsers. The browsers are setup in intern.json and playwright.config.ts. Check them out to see the used browser environments.

To override the ChromeDriver version, declare the CHROMEVER environment variable.

First, install the drivers to test the suite in browsers:

yarn playwright install  --with-deps

The tests are using the compiled version of the library and they are themselves also compiled. To compile the tests and library and watch for changes:

yarn watch

To run the unit tests:

yarn test:unit

To run the browser tests:

yarn test:browser

To run the browser suite against a particular browser (one of chrome|firefox), pass the value as the --project=$BROWSER flag:

yarn test:browser --project=chrome

To run the browser tests in a "headed" browser, pass the --headed flag:

yarn test:browser --project=chrome --headed

Test files

Please add your tests in the test files closely related to the feature itself. For example when touching the src/core/drive/page_renderer.ts your test will probably endup in the src/tests/functional/rendering_tests.ts.

The html files needed for the tests are stored in: src/tests/fixtures/

Run single test

To focus on single test, pass its file path:

yarn test:browser TEST_FILE

Where the TEST_FILE is the name of test you want to run. For example:

yarn test:browser src/tests/functional/drive_tests.ts

To execute a particular test, append :LINE where LINE is the line number of the call to test("..."):

yarn test:browser src/tests/functional/drive_tests.ts:11

Local webserver

Since the tests are running in headless browsers it's not easy to debug them easily without using the debugger. Sometimes it's easier to run the supplied webserver and manually click through the test fixtures.

To run the webserver:

yarn start

This requires a build (via yarn build), or a separate process running yarn watch.

The webserver is available on port 9000. Since the webserver is run from the root of the project the fixtures can be found using the same path as they have in the project itself, so src/tests/fixtures/rendering.html makes: http://localhost:9000/src/tests/fixtures/rendering.html

Depending on your operating system you are able to open the page using:

open http://localhost:9000/src/tests/fixtures/rendering.html