How to fix "No Route Matches" error with Rails i18n - ruby-on-rails

Question

Now I'm translating my rails app with rails i18n.
But path tests already passed have shown errors because i18n changed routes.
The error below is one of the errors.
I think my app is working well, so my tests have something wrong though.
I wanna know how to fix it.
Any solutions?
Error
ERROR["test_should_redirect_edit_when_not_logged_in", UsersControllerTest, 3.4624758772552013]
test_should_redirect_edit_when_not_logged_in#UsersControllerTest (3.46s)
　　ActionController::UrlGenerationError:
　　ActionController::UrlGenerationError: No route matches {:action=>"edit", :controller=>"users", :locale=>#<User id: 762146111,
　　　name: "Michael Example", email: "michael#example.com", created_at: "2022-11-09 09:53:30", updated_at: "2022-11-09 09:53:30",
　　　password_digest: "$2a$04$r.WTFttwDcJsuUdBSHQDi.IvFzECkpL37SEdlAKzpdX...", remember_digest: nil,
　　　admin: true, activation_digest: nil, activated: true, activated_at: "2022-11-09 09:53:30", reset_digest: nil, reset_sent_at: nil>},
　　　missing required keys: [:id], possible unmatched constraints: [:locale]
　　 test/controllers/users_controller_test.rb:21:in `block in <class:UsersControllerTest>'
Codes relating to the error
routes.rb
Rails.application.routes.draw do
scope "(:locale)", locale: /en | ja/ do
root 'static_pages#home'
get '/:locale' => 'static_pages#home'
get '/help', to: 'static_pages#help'
get '/about', to: 'static_pages#about'
get '/contact', to: 'static_pages#contact'
get '/search', to: 'movies#search'
get '/show', to: 'movies#show'
get '/signup', to: 'users#new'
post '/signup', to: 'users#create'
post '/guest_login', to: 'guest_sessions#create'
get '/login', to: 'sessions#new'
post '/login', to: 'sessions#create'
delete '/logout', to: 'sessions#destroy'
resources :users do
member do
get :following, :followers
end
end
resources :movies
resources :account_activations, only: [:edit]
resources :resend_activations, only: [:new, :create]
resources :password_resets, only: [:new, :create, :edit, :update]
resources :comments do
resource :comments, only: [:create, :new, :edit, :update, :destroy]
resource :favorites, only: [:create, :destroy]
end
resources :relationships, only: [:create, :destroy]
end
end
application.rb
require_relative 'boot'
require 'rails/all'
Bundler.require(*Rails.groups)
module Moviest
class Application < Rails::Application
config.load_defaults 5.1
config.i18n.load_path += Dir[Rails.root.join('my/locales/*.{rb,yml}')]
config.i18n.default_locale = :ja
config.action_view.embed_authenticity_token_in_remote_forms = true
config.time_zone = 'Tokyo'
config.active_record.default_timezone = :local
end
end
application_controller.rb
class ApplicationController < ActionController::Base
before_action :set_request
protect_from_forgery with: :exception
include SessionsHelper
def set_request
Thread.current[:request] = request
end
around_action :switch_locale
def switch_locale(&action)
locale = params[:locale] || I18n.default_locale
I18n.with_locale(locale, &action)
end
def default_url_options
{ locale: I18n.locale }
end
〜〜〜〜
end
users_controller_test.rb
require 'test_helper'
class UsersControllerTest < ActionDispatch::IntegrationTest
def setup
#user = users(:michael)
#other_user = users(:archer)
end
~
test "should redirect edit when not logged in" do
get edit_user_path(#user)　　　　　#error point
assert_not flash.empty?
assert_redirected_to login_url
end
~
end

Answer 1

I fixed the error with defining locale on a test file and calling it when #user was called.
The error occurred because test-driven development was used for the test based on Rails Tutorial, which means that locale is need to be defined on a test file.
Anyway, thank you.