Ruby: expand Twirp test

ruby/ql/test/library-tests/frameworks/Twirp/Twirp.expected

@@ -1,6 +1,8 @@
 sourceTest
 | hello_world_server.rb:8:13:8:15 | req |
+| hello_world_server.rb:32:18:32:20 | req |
 ssrfSinkTest
 | hello_world_client.rb:6:47:6:75 | "http://localhost:8080/twirp" |
 serviceInstantiationTest
 | hello_world_server.rb:24:11:24:61 | call to new |
+| hello_world_server.rb:38:1:38:57 | call to new |

ruby/ql/test/library-tests/frameworks/Twirp/hello_world_server.rb

@@ -5,7 +5,7 @@ require_relative 'hello_world/service_twirp.rb'
 
 class HelloWorldHandler
   # test: request
-  def hello(req, env) 
+  def hello(req, env)
     puts ">> Hello #{req.name}"
     {message: "Hello #{req.name}"}
   end
@@ -13,7 +13,7 @@ end
 
 class FakeHelloWorldHandler
   # test: !request
-  def hello(req, env) 
+  def hello(req, env)
     puts ">> Hello #{req.name}"
     {message: "Hello #{req.name}"}
   end
@@ -21,9 +21,18 @@ end
 
 handler = HelloWorldHandler.new()
 # test: serviceInstantiation
-service = Example::HelloWorld::HelloWorldService.new(handler) 
+service = Example::HelloWorld::HelloWorldService.new(handler)
 
 path_prefix = "/twirp/" + service.full_name
 server = WEBrick::HTTPServer.new(Port: 8080)
 server.mount path_prefix, Rack::Handler::WEBrick, service
 server.start
+
+class StaticHandler
+  def self.hello(req, env)
+    puts ">> Hello #{req.name}"
+    {message: "Hello #{req.name}"}
+  end
+end
+
+Example::HelloWorld::HelloWorldService.new(StaticHandler)