```ruby
begin
  require 'capybara/rails'
  require 'capybara/cucumber'
rescue LoadError
end

module Cucumber
  module Rails
    module World
      def visit(*)
        if defined?(super)
          super
        else
          raise Cucumber::Pending, "Capybara not loaded, please add it to your Gemfile:\n\ngem \"capybara\"\n\n"
        end
      end
    end
  end
end

World(Cucumber::Rails::World)

```

Allow user to control show_exceptions in tests
user
```ruby
begin
  require 'capybara/rails'
  require 'capybara/cucumber'
rescue LoadError
end

module Cucumber
  module Rails
    module World
      def visit(*)
        if defined?(super)
          super
        else
          raise Cucumber::Pending, "Capybara not loaded, please add it to your Gemfile:\n\ngem \"capybara\"\n\n"
        end
      end
    end
  end
end

World(Cucumber::Rails::World)

ActionController::Base.class_eval do
  cattr_accessor :allow_rescue
end

ActionDispatch::ShowExceptions.class_eval do
  alias __cucumber_orig_call__ call

  def call(env)
    env['action_dispatch.show_exceptions'] = !!ActionController::Base.allow_rescue
    __cucumber_orig_call__(env)
  end
end

Before('@allow-rescue') do
  @__orig_allow_rescue = ActionController::Base.allow_rescue
  ActionController::Base.allow_rescue = true
end

After('@allow-rescue') do
  ActionController::Base.allow_rescue = @__orig_allow_rescue
end
```
assistant