# Contributing

We follow the [IPython Contributing Guide](https://github.com/ipython/ipython/blob/master/CONTRIBUTING.md).

For development installation instructions, see the [README](README.md#dev-quickstart).

## Managing static files

The notebook relies on static dependencies (which are installed with Bower), its own minified JavaScript, and CSS compiled from LESS.

### Static dependencies

To install the static dependencies, run:

    python setup.py jsdeps

You can also pass a `-f` flag to this command to force Bower to run, if necessary.

### JavaScript

To compile the JavaScript, run:

    npm run build:js

### Compiling CSS

To compile the CSS from LESS, run:

    python setup.py css

### Git hooks

If you want to automatically update dependencies, recompile the JavaScript, and recompile the CSS after checking out a new commit, you can install post-checkout and post-merge hooks which will do it for you:

    ./git-hooks/install-hooks.sh

See the [git-hooks readme](git-hooks/README.md) for more details.

## Running tests

### JavaScript tests

To run the JavaScript tests, you will need to have PhantomJS and CasperJS installed:

    npm install -g casperjs phantomjs@1.9.18

Then, to run the JavaScript tests:

    python -m notebook.jstest [group]

where `[group]` is an optional argument that is a path relative to `notebook/tests`. For example, to run all tests in `notebook/tests/notebook`:

    python -m notebook.jstest notebook

or to run just `notebook/tests/notebook/deletecell.js`:

    python -m notebook.jstest notebook/deletecell.js

### Python tests

To run Python tests, run:

    nosetests notebook

If you want coverage statistics as well, you can run:

    nosetests --with-coverage --cover-package=notebook notebook
