src/railties/test/application/integration_test_case_test.rb
# frozen_string_literal: true

require "isolation/abstract_unit"
require "env_helpers"

module ApplicationTests
  class IntegrationTestCaseTest < ActiveSupport::TestCase
    include ActiveSupport::Testing::Isolation, EnvHelpers

    setup do
      build_app
    end

    teardown do
      teardown_app
    end

    test "resets Action Mailer test deliveries" do
      rails "generate", "mailer", "BaseMailer", "welcome"

      app_file "test/integration/mailer_integration_test.rb", <<-RUBY
        require "test_helper"

        class MailerIntegrationTest < ActionDispatch::IntegrationTest
          setup do
            @old_delivery_method = ActionMailer::Base.delivery_method
            ActionMailer::Base.delivery_method = :test
          end

          teardown do
            ActionMailer::Base.delivery_method = @old_delivery_method
          end

          2.times do |i|
            define_method "test_resets_deliveries_\#{i}" do
              BaseMailer.welcome.deliver_now
              assert_equal 1, ActionMailer::Base.deliveries.count
            end
          end
        end
      RUBY

      with_rails_env("test") { rails("db:migrate") }
      output = rails("test")
      assert_match(/0 failures, 0 errors/, output)
    end
  end

  class IntegrationTestDefaultApp < ActiveSupport::TestCase
    include ActiveSupport::Testing::Isolation, EnvHelpers

    setup do
      build_app
    end

    teardown do
      teardown_app
    end

    test "app method of integration tests returns test_app by default" do
      app_file "test/integration/default_app_test.rb", <<-RUBY
        require "test_helper"

        class DefaultAppIntegrationTest < ActionDispatch::IntegrationTest
          def test_app_returns_action_dispatch_test_app_by_default
            assert_equal ActionDispatch.test_app, app
          end
        end
      RUBY

      with_rails_env("test") { rails("db:migrate") }
      output = rails("test")
      assert_match(/0 failures, 0 errors/, output)
    end

    test "routes are loaded before inserting test routes" do
      app_file "config/routes.rb", <<-RUBY
        Rails.application.routes.draw do
          get "/c", as: :c, to: "users#show"
        end
      RUBY

      app_file "config/initializers/after_routes_loaded.rb", <<-RUBY
        Rails.configuration.after_routes_loaded do
          $after_routes_loaded = true
        end
      RUBY

      app_file "app/controllers/users_controller.rb", <<-RUBY
        class UsersController < ActionController::Base
          def index
            render json: { loaded: $after_routes_loaded }
          end
        end
      RUBY

      app_file "test/controllers/users_controller_test.rb", <<-RUBY
        require "test_helper"

        class UsersControllerTest < ActionDispatch::IntegrationTest
          with_routing do |set|
            set.draw do
              resources(:users, only: :index)
            end
          end

          test "lazy route loading" do
            get("/users")

            assert_equal({ "loaded" => true }, JSON.parse(response.body))
          end
        end
      RUBY

      output = rails("test")
      assert_match(/0 failures, 0 errors/, output)
    end
  end
end
