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Behat is an open source, community-driven project. We would love you to contribute to this awesome project, but remember to follow the few simple rules defined in this document.

Submitting an Issue

  1. State clearly if it is a feature, a problem or refactoring. You can even use one of the GitHub labels we carefully created just for that purpose. That makes our life easier as we tend to focus on resolving issues quicker than adding new features
  2. Outline clearly in one/two sentences why that feature is important to you or why that problem causes you grief (and at what scale). This helps us properly prioritise what we're working on
  3. Behat is automatically tested on every change. If you have a problem, chances are high it is something very specific to your context and the more we know about it the more likely we would be able help. At the very least provide us with enough information about your feature files, context classes and local environment
  4. Make sure you stay professional and do not use offensive language in your issue. Positive tone in the text of issues is known to reduce lead time to help
  5. If asked for clarification, we expect to hear back from you in 7 days. If no answer is given in 7 days, issue will be automatically closed. You can easily open new issue again later and this rule helps us reduce the clutter of "silent issues"

Submitting a Pull Request

  1. Make your feature addition, bug fix or refactoring
  2. Add new Scenario into one of existing features or create a new .feature file describing the changes. Check the features/ folder for examples. This is important so we don't break the changes you introduced in a future version unintentionally
  3. Make sure your changes adhere to Backwards Compatibility rules. This is important so that we adhere to Semantic Versioning v2.0.0
  4. Explain the kind of change you made under the [Unreleased] section of the CHANGELOG.md. You'd make our life even easier if you stick to Keep a Changelog format
  5. Do not mess with the BehatApplication::VERSION version
  6. Make sure you ran tests and didn't break anything. That will save some time for GitHub
  7. Commit your code and submit a Pull Request, providing a clear description of a change, similar to the one you did in the changelog

Backwards compatibility

Starting from v3.0.0, Behat is following Semantic Versioning v2.0.0. This means that we take backwards compatibility of public API very seriously. So unless you want your PR to start a new major version of Behat (v4.0.0 for example), you need to make sure that either you do not change existing interfaces and their usage across the system or that you at least introduce backwards compatibility layer together with your change. Not following these rules will cause a rejection of your PR. Exception could be an extremely rare case where BC break is introduced as a measure to fix a serious issue.

You can read detailed guidance on what BC means in Symfony2 BC guide.

Running tests

Make sure that you don't break anything with your changes by running the test suite with your locale set to english:

$> LANG=C bin/behat --format=progress