问rspec测试中的UrlGenerationError

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# frozen_string_literal: true
class ErrorsController < ApplicationController
  def show
    render status_code.to_s, status: status_code
  end

  protected

  # get status code from params, default 500 in cases where no error code
  def status_code
    params[:code] || 500
  end
end

require 'rails_helper'

describe ErrorsController, type: :controller do

    describe '#show' do
      it 'renders the 404 error page when it receives a 404 status code' do
      get :show, params: { code: '404' }
      # ive also tried changing the param passed to redirect_to to error_404 to no effect
      expect(response).to redirect_to(error_404_path)
    end

    it 'renders the 422 error page when it receives a 422 status code' do
      get :show, params: { code: '422' }
      expect(response).to redirect_to(error_422_path)
    end

    it 'renders the 500 error page when it receives a 500 status code' do
      get :show, params: { code: '500' }
      expect(response).to redirect_to(error_500_path)
    end
  end
end

%w(404 422 500).each do |code|
  get code, to: "errors#show", code: code, as: 'error_' + code
end

config.exceptions_app = self.routes