railties/test/generators/helper_generator_test.rb


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# frozen_string_literal: true

require "generators/generators_test_helper"
require "rails/generators/rails/helper/helper_generator"

ObjectHelper = Class.new
AnotherObjectHelperTest = Class.new

class HelperGeneratorTest < Rails::Generators::TestCase
  include GeneratorsTestHelper
  arguments %w(admin)

  def test_helper_skeleton_is_created
    run_generator
    assert_file "app/helpers/admin_helper.rb", /module AdminHelper/
  end

  def test_check_class_collision
    content = capture(:stderr) { run_generator ["object"] }
    assert_match(/The name 'ObjectHelper' is either already used in your application or reserved/, content)
  end

  def test_namespaced_and_not_namespaced_helpers
    run_generator ["products"]

    # We have to require the generated helper to show the problem because
    # the test helpers just check for generated files and contents but
    # do not actually load them. But they have to be loaded (as in a real environment)
    # to make the second generator run fail
    require "#{destination_root}/app/helpers/products_helper"

    assert_nothing_raised do
      run_generator ["admin::products"]
    ensure
      # cleanup
      Object.send(:remove_const, :ProductsHelper)
    end
  end

  def test_helper_suffix_is_not_duplicated
    run_generator %w(products_helper)

    assert_no_file "app/helpers/products_helper_helper.rb"
    assert_file "app/helpers/products_helper.rb"
  end
end