Support rails 7.1 (#575)

* add rails 7.1 gemfile

* add rails 7.1 to test workflow

* use symbols to show exceptions

Removes
```
DEPRECATION WARNING: Setting action_dispatch.show_exceptions to false is deprecated. Set to :none instead. (called from call at /home/runner/work/cucumber-rails/cucumber-rails/lib/cucumber/rails/action_dispatch.rb:14)
```

* deal with new raise_on_missing_callback_conditionals rails feature

Rails 7.1 introduces a new "Raise error on missing only unless" feature
(see rails/rails#43487).

The new feature is enabled by default. I rewrote the
auto-generated code in feature specs to comply to the new rule.

Author: mgrunberg

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby: ['2.6', '2.7', '3.0', '3.1', '3.2']
-        gemfile: ['rails_5_2', 'rails_6_0', 'rails_6_1', 'rails_7_0']
+        gemfile: ['rails_5_2', 'rails_6_0', 'rails_6_1', 'rails_7_0', 'rails_7_1']
         exclude:
           # Latest ruby will test
           # - all rails versions in current major
@@ -34,7 +34,9 @@ jobs:
           - { ruby: '2.6', gemfile: 'rails_6_0' }
           - { ruby: '2.6', gemfile: 'rails_6_1' }
           - { ruby: '2.6', gemfile: 'rails_7_0' }
+          - { ruby: '2.6', gemfile: 'rails_7_1' }
           - { ruby: '2.7', gemfile: 'rails_7_0' }
+          - { ruby: '2.7', gemfile: 'rails_7_1' }
           # Ruby 3+ won't work with Rails 5.2: https://github.com/rails/rails/issues/40938
           - { ruby: '3.0', gemfile: 'rails_5_2' }
           - { ruby: '3.1', gemfile: 'rails_5_2' }

Appraisals

@@ -32,3 +32,9 @@ appraise 'rails_7_0' do
   gem 'railties',    '~> 7.0.0'
   gem 'sqlite3', '~> 1.4'
 end
+
+appraise 'rails_7_1' do
+  gem 'activerecord'
+  gem 'railties',    '~> 7.1.0'
+  gem 'sqlite3', '~> 1.4'
+end

features/emulate_javascript.feature

@@ -64,6 +64,11 @@ Feature: Emulate Javascript
         before_action except: :establish do
           render text: 'denied', status: :forbidden and return false unless session[:verified]
         end
+
+        # Rails 7.1 introduces raise_on_missing_callback_conditionals and it's on by default
+        def establish
+          raise "This action must be implemented in child controllers"
+        end
       end
       """
     And I write to "features/widgets.feature" with:

gemfiles/rails_7_1.gemfile

@@ -0,0 +1,9 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activerecord"
+gem "railties", "~> 7.1.0"
+gem "sqlite3", "~> 1.4"
+
+gemspec path: "../"

lib/cucumber/rails/action_dispatch.rb

@@ -10,7 +10,14 @@ module ActionDispatch
       module ShowExceptions
         def call(env)
           env['action_dispatch.show_detailed_exceptions'] = !ActionController::Base.allow_rescue
-          env['action_dispatch.show_exceptions'] = !env['action_dispatch.show_detailed_exceptions']
+
+          show_exceptions = !env['action_dispatch.show_detailed_exceptions']
+          if ::Rails.gem_version >= Gem::Version.new('7.1.0')
+            # Rails 7.1 deprecated `show_exceptions` boolean in in favor of symbols
+            show_exceptions = show_exceptions ? :all : :none
+          end
+
+          env['action_dispatch.show_exceptions'] = show_exceptions
           super(env)
         end
       end