# Contributing
Want to contribute? Great! First, read this page.


## Before you contribute
Before we can use your code, you must sign the
[Google Individual Contributor License Agreement]
(https://cla.developers.google.com/about/google-individual)
(CLA), which you can do online. The CLA is necessary mainly because you own the
copyright to your changes, even after your contribution becomes part of our
codebase, so we need your permission to use and distribute your code. We also
need to be sure of various other things—for instance that you'll tell us if you
know that your code infringes on other people's patents. You don't have to sign
the CLA until after you've submitted your code for review and a member has
approved it, but you must do it before we can put your code into our codebase.
Before you start working on a larger contribution, you should get in touch with
us first through the issue tracker with your idea so that we can help out and
possibly guide you. Coordinating up front makes it much easier to avoid
frustration later on.

### The small print
Contributions made by corporations are covered by a different agreement than
the one above, the
[Software Grant and Corporate Contributor License Agreement](https://cla.developers.google.com/about/google-corporate).

## Pre-submit Steps

### Code reviews
All submissions, including submissions by project members, require review. We
use GitHub pull requests for this purpose.

### Testing
To run the unit tests for Mobly to verify your local changes:

Make sure you have `tox` installed:
```sh
pip3 install tox
```

Then in the Mobly directory, run:
```sh
mobly $ tox
```

### Code style
Before pushing your changes, you need to lint the code style via `pyink`

To install `pyink`:

```sh
$ pip3 install pyink
```

To lint the code:

```sh
mobly $ pyink .
```