Make puma log silence completely

Author: ta1kt0me

features/system_specs/system_specs.feature

@@ -25,7 +25,7 @@ Feature: System spec
     javascript, you do not need [DatabaseCleaner](https://github.com/DatabaseCleaner/database_cleaner).
 
     @system_test
-    Scenario: System specs
+    Scenario: System specs driven by rack_test
         Given a file named "spec/system/widget_system_spec.rb" with:
           """ruby
           require "rails_helper"
@@ -81,3 +81,29 @@ Feature: System spec
       """
       When I run `rspec spec/system/some_job_system_spec.rb`
       Then the example should pass
+
+    @system_test
+    Scenario: System specs driven by selenium_chrome_headless
+        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(:selenium_chrome_headless)
+            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"
+        And the output should not contain "Puma starting"

lib/rspec/rails/example/system_example_group.rb

@@ -50,6 +50,10 @@ def app
       end
 
       included do |other|
+        ActiveSupport.on_load(:action_dispatch_system_test_case) do
+          ActionDispatch::SystemTesting::Server.silence_puma = true
+        end
+
         begin
           require 'capybara'
           require 'action_dispatch/system_test_case'
@@ -77,7 +81,7 @@ def app
 
         attr_reader :driver
 
-        if ActionDispatch::SystemTesting::Server.respond_to?(:silence_puma=)
+        if ::Rails.version.to_f == 5.1
           ActionDispatch::SystemTesting::Server.silence_puma = true
         end