[spec] run the chat server as part of rspec

Rakefile

@@ -3,22 +3,4 @@ require 'rspec/core/rake_task'
 
 RSpec::Core::RakeTask.new(:spec)
 
-task :server do
-  pid = 0
-  Bundler.with_clean_env do
-    nul = RbConfig::CONFIG['host_os'] =~ /mswin|mingw/ ? 'nul' : '/dev/null'
-    pid = spawn "bundle exec puma 'spec/chat_server.ru' 2>#{nul}"
-  end
-
-  at_exit do
-    $stderr.puts "Killing pid #{pid}"
-    Process.kill('KILL', pid)
-    Process.wait(pid)
-  end
-
-  sleep 3
-end
-
-task :spec => :server
-
 task default: :spec

spec/chat_server.ru → spec/chat_server_helper.rb

@@ -11,4 +11,13 @@
 
 # Run the Chat Sinatra app.
 require "#{chat_example_path}/chat"
-run Chat
+
+RSpec.configure do |config|
+  config.around(:all) do |example|
+    server = Thread.new { Chat.run! }
+
+    example.run
+
+    server.kill
+  end
+end