wait_for関係

rails_helper.rb

# デフォでコメントアウトされてるの外すだけ
Dir[Rails.root.join('spec', 'support', '**', '*.rb')].each { |f| require f }

RSpec.configure do |config|
  config.include WaitFor
end

top_spec.rb

# spec/features/top_spec.rb
require 'rails_helper'

feature 'top page' do
  describe 'visit top page' do
    context '100 users' do
      background { create_list(:user, 100) }
      given!(:user) { create(:user) }
      scenario 'collapse test' do
        visit root_path
        # こんな感じで括る
        wait_for_html { click_on 'トグルボタン' }
        click_on user.name
        expect(page.current_path).to eq "/users/#{user.id}"
      end
    end
  end
end

wait_for.rb

# spec/support/wait_for.rb
module WaitFor
  def wait_for_html(wait_time: Capybara.default_max_wait_time)
    prev_html = page.html
    yield if block_given?
    Timeout.timeout(wait_time) { loop until prev_html != page.html }
  end
end