Capybara: why doesn't the :visible option work?

Question

Ruby on Rails

Please help me figure out why Capybara always finds the email field regardless of the visible value.
There is a page with the following field on the form:

<label>
  <input type="email" name="email" class="hide" placeholder="Email">
</label>

This is the .hide class

.hide {
    display: none !important;
}

When I test a page with Capybara with the Poltergeist driver, I do a very simple test:

<br>
page.must_have_field('email', :type => 'email', :visible => false)<br>
check('Send by email')<br>
page.must_have_field('email', :type => 'email', :visible => true)<br>

So the test passes, despite the fact that there is no code for switching the visibility of the field, i.e. it is always hidden.

Answer 1

The error was that I configured the driver for Capybara incorrectly.
Instead
of Capybara.default_driver = :poltergeist
I had
Capybara.javascript_driver = :poltergeist
I learned that I was working with a default driver that doesn't look for hidden elements correctly.