cucumber-protractor/uiTestHelpers/stepDefinitions/checks/checkCookieExists.js

POM CukeTractor - Bootstrap your cucumber tests with cucumber, protractor and a structured way of creating page objects and component objects

module.exports = function checkCookieExists(cookieName, doesNotExist) {
  return browser.manage().getCookie(cookieName)
    .then((cookie) => (
      doesNotExist ?
        expect(cookie).to.equal(null) :
        expect(cookie).to.not.equal(null)
    ));
};