tasks/datadriver.js
function(callback) {
                grunt.log.debug('run mocha tests');

                /**
                 * save session ID
                 */
                sessionID = GLOBAL.browser.requestHandler.sessionID;

                mocha.run(next(callback));
            }
function(callback) {
                grunt.log.debug('run mocha tests');

                /**
                 * save session ID
                 */
                sessionID = GLOBAL.browser.requestHandler.sessionID;

                mocha.run(next(callback));
            }
run mocha tests