Testing rails controllers that change behavior based on "if turbo_frame_request?"

exercise_turbo_frame_request_conditional.rb

# Based on this code: https://github.com/hotwired/turbo-rails/blob/main/app/controllers/turbo/frames/frame_request.rb
# the response of turbo_frame_request? is based on the presence of a header named "Turbo-Frame".
# Therefore, you can exercise code behind this conditional in your controller tests by specifying that header in your GET requests.

# example controller action
class DashboardController < ApplicationController
  # GET dashboard
  def index
    if turbo_frame_request?
      # frame loading behavior
      @frame_instance_variable = bar
      render 'frame'
    else
      # page loading behavior
      @dashboard = foo
      render 'index'
    end
  end
end

# Example tests
test 'user gets dashboard' do
  get dashboard_url
  assert_response :success
end
test 'user gets dashboard frame' do
  get dashboard_url, headers: { 'Turbo-Frame': '1' }
  assert_response :success
end