React event not triggered [help]

[wenderjean]

hey guys,

I'm running a Rails project with Rspec, Capybara and Poltergeist and I'm currently fighting with a problem related to React components, I have a feature with a button managed by React with an onclick event that only render some content, running my tests against that feature with Poltergeist driver my tests fail once the click_on function doesn't trigger the action.

The curios thing is that I tried with chromedriver and selenium and both work well.

I'm running in an os x (sierra) and my project configuration is:

ruby: 2.2.4
rails: 4.2.6
phantomjs: 2.2.1

poltergeist: 1.10.0
react-rails: 1.8.0

Capybara.javascript_driver = :poltergeist

options = {
  timeout: 360,
  logger: nil,
  phantomjs_options: ['--load-images=no', '--ignore-ssl-errors=yes']
}

Capybara.register_driver(:poltergeist) do |app|
  Capybara::Poltergeist::Driver.new app, options
end

We're writing modules using es6 transpiled by babel, and we don't have javascript errors in logs

[twalpole]

Are you 100% all JS is getting transpiled to ES5 compatible? Unfortunately parse time errors for ES6 features like let can be silently swallowed by PhantomJS, so you end up with no errors but also with no JS being actually run.

[wenderjean]

The problem: We were using Promise, js was getting transpiled well but phantomjs does not recognize Promise as well.

Thanks @twalpole