lib/capybara/spec/session/evaluate_async_script_spec.rb
# frozen_string_literal: true Capybara::SpecHelper.spec '#evaluate_async_script', requires: [:js] do it 'should evaluate the given script and return whatever it produces' do @session.visit('/with_js') expect(@session.evaluate_async_script('arguments[0](4)')).to eq(4) end it 'should support passing elements as arguments to the script', requires: %i[js es_args] do @session.visit('/with_js') el = @session.find(:css, '#drag p') result = @session.evaluate_async_script('arguments[2]([arguments[0].innerText, arguments[1]])', el, 'Doodle Funk') expect(result).to eq ['This is a draggable element.', 'Doodle Funk'] end it 'should support returning elements after asynchronous operation', requires: %i[js es_args] do @session.visit('/with_js') @session.find(:css, '#change') # ensure page has loaded and element is available el = @session.evaluate_async_script("var cb = arguments[0]; setTimeout(function(){ cb(document.getElementById('change')) }, 100)") expect(el).to be_instance_of(Capybara::Node::Element) expect(el).to eq(@session.find(:css, '#change')) end end