Add cukes

Rakefile

@@ -28,8 +28,8 @@ end
 
 Cucumber::Rake::Task.new(:cucumber) do |t|
   version = ENV.fetch("RAILS_VERSION", "~> 4.2.0")
-  cucumber_flag = "--tags ~@rails_post_5"
   tags = []
+
   if version.to_f >= 5.1
     tags << "~@rails_pre_5.1"
   end
@@ -38,8 +38,13 @@ Cucumber::Rake::Task.new(:cucumber) do |t|
     tags << "~@rails_pre_5"
   end
 
+  if version.to_f == 5.0
+    tags << "~@system_test"
+  end
+
   if tags.empty?
     tags << "~@rails_post_5"
+    tags << "~@system_test"
   end
 
   cucumber_flag = tags.map { |tag| "--tag #{tag}" }

example_app_generator/generate_app.rb

@@ -20,6 +20,7 @@
   gsub_file 'Gemfile', /^.*\bgem 'rails.*$/, ''
   gsub_file "Gemfile", /.*web-console.*/, ''
   gsub_file "Gemfile", /.*debugger.*/, ''
+  gsub_file "Gemfile", /.*puma.*/, ""
 
   if Rails::VERSION::STRING >= '5.0.0'
     append_to_file('Gemfile', "gem 'rails-controller-testing', :git => 'https://github.com/rails/rails-controller-testing'\n")

features/system_specs/system_specs.feature

@@ -0,0 +1,35 @@
+Feature: System spec
+
+    System specs are RSpec's wrapper around Rails' own
+    [system tests](http://guides.rubyonrails.org/testing.html#system-testing).
+    We encourage you to familiarse yourself with their documentation.
+
+    RSpec **does not** use your `ApplicationSystemTestCase` helper. Instead it uses
+    the default `driven_by(:selenium)` from Rails. If you want to override this
+    behaviour you can call `driven_by` manually in a test.
+
+
+    @system_test
+    Scenario: System specs
+        Given a file named "spec/system/widget_system_spec.rb" with:
+          """ruby
+          require "rails_helper"
+
+          RSpec.describe "Widget management", :type => :system do
+            before do
+              driven_by(:rack_test)
+            end
+
+            it "enables me to create widgets" do
+              visit "/widgets/new"
+
+              fill_in "Name", :with => "My Widget"
+              click_button "Create Widget"
+
+              expect(page).to have_text("Widget was successfully created.")
+            end
+          end
+          """
+        When I run `rspec spec/system/widget_system_spec.rb`
+        Then the exit status should be 0
+        And the output should contain "1 example, 0 failures"