Contributing to Selenium
The Selenium project welcomes contributions from everyone. There are a number of ways you can help:
When opening new issues or commenting on existing issues please make sure discussions are related to concrete technical issues with the Selenium software.
It's imperative that issue reports outline the steps to reproduce the defect. If the issue can't be reproduced it will be closed. Please provide concise reproducible test cases and describe what results you are seeing and what results you expect.
Issues shouldn't be used for support. Please address questions to the
selenium-users@ mailing list.
Discussion of high level project ideas or non-technical topics should
move to the
selenium-developers@ mailing list
We also need help with triaging issues that needs investigation. This means asking the right questions, procuring the right information to properly debug and verify the issue, and bisecting a commit range if the issue is a regression.
If you find that Selenium is missing something, feel free to open an issue with details describing what feature(s) you'd like added or changed.
If you'd like a hand at trying to implement the feature yourself, please refer to the Code Contributions section of the document.
Selenium is a big software project and documentation is key to understanding how things work and learning effective ways to exploit its potential.
The official documentation of Selenium is still served from our www.seleniumhq.org repository. We are however phasing out this documentation which focuses too much on Selenium RC and other antiquated pieces, in favour of a rewrite.
The new documentation is a project started to rewrite Selenium's documentation from scratch. This is an ongoing effort (not targetted at any specific release) to provide an updated handbook on how to use Selenium effectively. We hope to bring over the pieces of the old documentation that makes sense.
Contributions toward the new docs follow the same process described in the next section about code contributions. You should spend some time familiarising yourself with the documentation by reading more about it.
The Selenium project welcomes new contributors. Individuals making significant and valuable contributions over time are made Committers and given commit-access to the project.
If you're looking for easy bugs, have a look at issues labelled E-easy on Github.
This document will guide you through the contribution process.
Step 1: Fork
Fork the project on Github and check out your copy locally.
% git clone email@example.com:username/selenium.git % cd selenium % git remote add upstream git://github.com/seleniumhq/selenium.git
We bundle dependencies in the third-party/ directory that is not part of the proper project. Any changes to files in this directory or its subdirectories should be sent upstream to the respective projects. Please don't send your patch to us as we cannot accept it.
We do accept help in upgrading our existing dependencies or removing superfluous dependencies. If you need to add a new dependency it's often a good idea to reach out to the committers on the IRC channel or the mailing list to check that your approach aligns with the project's ideas. Nothing is more frustrating than seeing your hard work go to waste because your vision doesn't align with the project's.
Every file in the Selenium project must carry the following license header boilerplate:
Licensed to the Software Freedom Conservancy (SFC) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The SFC licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
There's no need to include a copyright statement in the file's header. The copyright attributions can be reviewed in the NOTICE file found in the top-level directory.
Step 2: Branch
Create a feature branch and start hacking:
% git checkout -b my-feature-branch
We practice HEAD-based development, which means all changes are applied directly on top of master.
Step 3: Commit
First make sure git knows your name and email address:
% git config --global user.name 'Santa Claus' % git config --global user.email 'firstname.lastname@example.org'
Writing good commit messages is important. A commit message should describe what changed, why, and reference issues fixed (if any). Follow these guidelines when writing one:
- The first line should be around 50 characters or less and contain a short description of the change.
- Keep the second line blank.
- Wrap all other lines at 72 columns.
Fixes #N, where N is the issue number the commit fixes, if any.
A good commit message can look like this:
explain commit normatively in one line Body of commit message is a few lines of text, explaining things in more detail, possibly giving some background about the issue being fixed, etc. The body of the commit message can be several paragraphs, and please do proper word-wrap and keep columns shorter than about 72 characters or so. That way `git log` will show things nicely even when it is indented. Fixes #141
The first line must be meaningful as it's what people see when they
git shortlog or
git log --oneline.
Step 4: Rebase
git rebase (not
git merge) to sync your work from time to time.
% git fetch upstream % git rebase upstream/master
Step 5: Test
Bug fixes and features should have tests. Look at other tests to see how they should be structured.
Before you submit your pull request make sure you pass all the tests:
% ./go clean test
Step 6: Sign the CLA
Before we can accept, we first ask people to sign a Contributor License Agreement (or CLA). We ask this so that we know that contributors have the right to donate the code.
When you open your pull request we ask that you indicate that you've signed the CLA. This will reduce the time it takes for us to integrate it.
Step 7: Push
% git push origin my-feature-branch
Go to https://github.com/yourusername/selenium.git and press the Pull Request and fill out the form. Please indicate that you've signed the CLA (see Step 6).
Pull requests are usually reviewed within a few days. If there are comments to address, apply your changes in new commits (preferably fixups) and push to the same branch.
Step 8: Integration
When code review is complete, a committer will take your PR and integrate it on Selenium's master branch. Because we like to keep a linear history on the master branch, we will normally squash and rebase your branch history.
Stages of an Issue or PR
From your create your issue or pull request, through code review and towards integration, it will be assigned different Github labels. The labels serve for the committers to more easily keep track of work that's pending or awaiting action.
Component labels are yellow and carry the C prefix. They highlight the subsystem or component your PR makes changes in.
The driver labels (D) indicate if the changes are related to a WebDriver implementation or the Selenium atoms.
The review labels (R) are:
- awaiting answer: awaits an answer from you
- awaiting merge: waits for a committer to integrate the PR
- awaiting reviewer: pending code review
- blocked on external: a change in an upstream repo is required
- needs code changes: waiting for you to fix a review issue
- needs rebase: the branch isn't in sync with master and needs to be rebased
Issues are labelled to make them easier to categorise and find by:
- which component they relate to (java, cpp, dotnet, py, rb, nodejs)
- which driver is affected
- their presumed difficulty (easy, less easy, hard)
- what type of issue they are (defect, race condition, cleanup)