RouteSet generate extras for json requests

bug_report.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "rails", github: 'rails/rails'
end

require "rack/test"
require "action_controller/railtie"

class TestApp < Rails::Application
  config.root = __dir__
  config.hosts << "example.org"
  config.session_store :cookie_store, key: "cookie_store_key"
  secrets.secret_key_base = "secret_key_base"

  config.logger = Logger.new($stdout)
  Rails.logger  = config.logger

  routes.draw do
    resources :customers
  end
end

class CustomersController < ActionController::Base
  include Rails.application.routes.url_helpers

  def update
    puts params[:customer][:tax_exemptions]

    head(:ok)
  end
end

require "minitest/autorun"
require "action_controller/test_case"

class BugTest < ActionController::TestCase
  tests CustomersController

  setup do
    @routes = Rails.application.routes

    request.headers['CONTENT_TYPE'] = "application/json"
  end

  def test_returns_success
    put(:update, params: { id: 1, customer: { tax_exemptions: [] }, format: 'json'  })
  end
end