Capybara testing value of hidden field

just do this:

find("#id_of_hidden_input", :visible => false).value

the matcher has_field? works with hidden fields as well. no need to do weird gymnastics with find or all in this context.

page.has_field? "label of the field", type: :hidden, with: "field value"
page.has_field? "id_of_the_field", type: :hidden, with: "field value"

the key here is setting the :type option to :hidden explicitly.

why use a label with a hidden field? this comes in handy if you're using a js library, like flatpickr, that cloaks your original text field to hide it. not coupling your behavior tests to specific markup is always a good thing.