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diff --git a/guides/source/testing.md b/guides/source/testing.md index 02b60a395b..9541598b26 100644 --- a/guides/source/testing.md +++ b/guides/source/testing.md @@ -1397,6 +1397,56 @@ class ProfileControllerTest < ActionDispatch::IntegrationTest end ``` +#### Using Separate Files + +If you find your helpers are cluttering `test_helper.rb`, you can extract them into separate files. One good place to store them is `lib/test`. + +```ruby +# lib/test/multiple_assertions.rb +module MultipleAssertions + def assert_multiple_of_fourty_two(number) + assert (number % 42 == 0), 'expected #{number} to be a multiple of 42' + end +end +``` + +These helpers can then be explicitly required as needed and included as needed + +```ruby +require 'test_helper' +require 'test/multiple_assertions' + +class NumberTest < ActiveSupport::TestCase + include MultipleAssertions + + test '420 is a multiple of fourty two' do + assert_multiple_of_fourty_two 420 + end +end +``` + +or they can continue to be included directly into the relevant parent classes + +```ruby +# test/test_helper.rb +require 'test/sign_in_helper' + +class ActionDispatch::IntegrationTest + include SignInHelper +end +``` + +#### Eagerly Requiring Helpers + +You may find it convenient to eagerly require helpers in `test_helper.rb` so your test files have implicit access to them. This can be accomplished using globbing, as follows + +```ruby +# test/test_helper.rb +Dir[Rails.root.join('lib', 'test', '**', '*.rb')].each { |file| require file } +``` + +This has the downside of increasing the boot-up time, as opposed to manually requiring only the necessary files in your individual tests. + Testing Routes -------------- |