order.rb

RSpec::Matchers.define :match_unordered_json_string do |json_string|

  match do |actual|
    sort_hash(JSON.parse(actual)).to_json == sort_hash(JSON.parse(json_string)).to_json
  end

  description do
    "be in the correct order"
  end

  failure_message_for_should do |actual|
    "expected\n'#{actual}'\n to equal:\n'#{json_string}'\n after sorting"
  end

  failure_message_for_should_not do |actual|
    "expected\n'#{actual}'\n not to equal:\n'#{json_string}'\n after sorting"
  end
end

def sort_hash(hash)
  sorted_hash = {}
  hash.keys.sort.each do |k|
    if hash[k].is_a?(Hash)
      sorted_hash[k] = sort_hash(hash[k])
    elsif hash[k].is_a?(Array) && hash[k].first.is_a?(Hash)
      sorted_hash[k] = hash[k].collect{ |h| sort_hash(h) }
    else
     sorted_hash[k] = hash[k]
    end
  end
  sorted_hash
end

###
expect(response_body).to match_unordered_json_string({authentication: json_user.expected_response(user, user, includes: [:authentication_token])}.to_json)