rails--rails/railties/test/application/middleware/exceptions_test.rb

# encoding: utf-8
require 'isolation/abstract_unit'
require 'rack/test'

module ApplicationTests
  class MiddlewareExceptionsTest < Test::Unit::TestCase
    include ActiveSupport::Testing::Isolation
    include Rack::Test::Methods

    def setup
      build_app
      boot_rails
    end

    def teardown
      teardown_app
    end

    test "show exceptions middleware filter backtrace before logging" do
      my_middleware = Struct.new(:app) do
        def call(env)
          raise "Failure"
        end
      end

      app.config.middleware.use my_middleware

      stringio = StringIO.new
      Rails.logger = Logger.new(stringio)

      get "/"
      assert_no_match(/action_dispatch/, stringio.string)
    end

    test "renders active record exceptions as 404" do
      my_middleware = Struct.new(:app) do
        def call(env)
          raise ActiveRecord::RecordNotFound
        end
      end

      app.config.middleware.use my_middleware

      get "/"
      assert_equal 404, last_response.status
    end

    test "uses custom exceptions app" do
      add_to_config <<-RUBY
        config.exceptions_app = lambda do |env|
          ["404", { "Content-Type" => "text/plain" }, ["YOU FAILED BRO"]]
        end
      RUBY

      app.config.action_dispatch.show_exceptions = true

      get "/foo"
      assert_equal 404, last_response.status
      assert_equal "YOU FAILED BRO", last_response.body
    end

    test "unspecified route when action_dispatch.show_exceptions is not set raises an exception" do
      app.config.action_dispatch.show_exceptions = false

      assert_raise(ActionController::RoutingError) do
        get '/foo'
      end
    end

    test "unspecified route when action_dispatch.show_exceptions is set shows 404" do
      app.config.action_dispatch.show_exceptions = true

      assert_nothing_raised(ActionController::RoutingError) do
        get '/foo'
        assert_match "The page you were looking for doesn't exist.", last_response.body
      end
    end

    test "unspecified route when action_dispatch.show_exceptions and consider_all_requests_local are set shows diagnostics" do
      app.config.action_dispatch.show_exceptions = true
      app.config.consider_all_requests_local = true

      assert_nothing_raised(ActionController::RoutingError) do
        get '/foo'
        assert_match "No route matches", last_response.body
      end
    end

    test "displays diagnostics message when exception raised in template that contains UTF-8" do
      app.config.action_dispatch.show_exceptions = true

      controller :foo, <<-RUBY
        class FooController < ActionController::Base
          def index
          end
        end
      RUBY

      app_file 'app/views/foo/index.html.erb', <<-ERB
        <% raise  'boooom' %>
        ✓
      ERB

      app_file 'config/routes.rb', <<-RUBY
        AppTemplate::Application.routes.draw do
          match ':controller(/:action)'
        end
      RUBY

      post '/foo', :utf8 => '✓'
      assert_match(/boooom/, last_response.body)
    end
  end
end