Speed up Unicorn specs by using a dummy Rack application instead of GitLab

app/controllers/unicorn_test_controller.rb

-# :nocov:
-if Rails.env.test?
-  class UnicornTestController < ActionController::Base
-    def pid
-      render plain: Process.pid.to_s
-    end
-
-    def kill
-      Process.kill(params[:signal], Process.pid)
-      render plain: 'Bye!'
-    end
-  end
-end
-# :nocov:

config/routes.rb

@@ -100,7 +100,5 @@ Rails.application.routes.draw do
 
   root to: "root#index"
 
-  draw :test if Rails.env.test?
-
   get '*unmatched_route', to: 'application#route_not_found'
 end

config/routes/test.rb

-get '/unicorn_test/pid' => 'unicorn_test#pid'
-post '/unicorn_test/kill' => 'unicorn_test#kill'

lib/gitlab/path_regex.rb

@@ -51,7 +51,6 @@ module Gitlab
       slash-command-logo.png
       snippets
       u
-      unicorn_test
       unsubscribes
       uploads
       users

lib/tasks/brakeman.rake

@@ -2,7 +2,7 @@ desc 'Security check via brakeman'
 task :brakeman do
   # We get 0 warnings at level 'w3' but we would like to reach 'w2'. Merge
   # requests are welcome!
-  if system(*%w(brakeman --no-progress --skip-files lib/backup/repository.rb,app/controllers/unicorn_test_controller.rb -w3 -z))
+  if system(*%w(brakeman --no-progress --skip-files lib/backup/repository.rb -w3 -z))
     puts 'Security check succeed'
   else
     puts 'Security check failed'

spec/unicorn/unicorn_spec.rb

@@ -37,7 +37,22 @@ describe 'Unicorn' do
     config_path = 'tmp/tests/unicorn.rb'
     File.write(config_path, config_lines.join("\n") + "\n")
 
-    cmd = %W[unicorn -E test -c #{config_path} #{Rails.root.join('config.ru')}]
+    rackup_path = 'tmp/tests/config.ru'
+    File.write(rackup_path, <<~EOS)
+      app =
+        proc do |env|
+          if env['REQUEST_METHOD'] == 'GET'
+            [200, {}, [Process.pid]]
+          else
+            Process.kill(env['QUERY_STRING'], Process.pid)
+            [200, {}, ['Bye!']]
+          end
+        end
+
+      run app
+    EOS
+
+    cmd = %W[unicorn -E test -c #{config_path} #{rackup_path}]
     @unicorn_master_pid = spawn(*cmd)
     wait_unicorn_boot!(@unicorn_master_pid, ready_file)
     WebMock.allow_net_connect!
@@ -45,14 +60,14 @@ describe 'Unicorn' do
 
   %w[SIGQUIT SIGTERM SIGKILL].each do |signal|
     it "has a worker that self-terminates on signal #{signal}" do
-      response = Excon.get('unix:///unicorn_test/pid', socket: @socket_path)
+      response = Excon.get('unix://', socket: @socket_path)
       expect(response.status).to eq(200)
 
       worker_pid = response.body.to_i
       expect(worker_pid).to be > 0
 
       begin
-        Excon.post('unix:///unicorn_test/kill', socket: @socket_path, body: "signal=#{signal}")
+        Excon.post("unix://?#{signal}", socket: @socket_path)
       rescue Excon::Error::Socket
         # The connection may be closed abruptly
       end