setup.js

// taken from https://github.com/lelandrichardson/enzyme-example-mocha/blob/master/test/.setup.js

require('babel-core/register')();

var jsdom = require('jsdom').jsdom;

var exposedProperties = ['window', 'navigator', 'document'];

global.document = jsdom('');
global.window = document.defaultView;
Object.keys(document.defaultView).forEach((property) => {
    if (typeof global[property] === 'undefined') {
        exposedProperties.push(property);
        global[property] = document.defaultView[property];
    }
});

global.navigator = {
    userAgent: 'node.js'
};

documentRef = document;

function noop() {
  return null;
}

require.extensions['.less'] = noop;