JRuby version of integration server, started in-process w/ ScriptingContainer

test/integration_helper.rb

@@ -4,7 +4,7 @@ require 'open-uri'
 require 'net/http'
 
 module IntegrationHelper
-  class Server
+  class BaseServer
     extend Enumerable
     attr_accessor :server, :port, :pipe
     alias name server
@@ -127,6 +127,60 @@ module IntegrationHelper
     end
   end
 
+  if RUBY_ENGINE == "jruby"
+    class JRubyServer < BaseServer
+      def start_vm
+        require 'java'
+        # Create a new container, set load paths and env
+        # SINGLETHREAD means create a new runtime
+        vm = org.jruby.embed.ScriptingContainer.new(org.jruby.embed.LocalContextScope::SINGLETHREAD)
+        vm.load_paths = [File.expand_path('../../lib', __FILE__)]
+        vm.environment = ENV.merge('RACK_ENV' => environment.to_s)
+
+        # This ensures processing of RUBYOPT which activates Bundler
+        vm.provider.ruby_instance_config.process_arguments []
+        vm.argv = ['-s', server.to_s, '-o', '127.0.0.1', '-p', port.to_s, '-e', environment.to_s]
+
+        # Set stdout/stderr so we can retrieve log
+        @pipe = java.io.ByteArrayOutputStream.new
+        vm.output = java.io.PrintStream.new(@pipe)
+        vm.error  = java.io.PrintStream.new(@pipe)
+
+        Thread.new do
+          # Hack to ensure that Kernel#caller has the same info as
+          # when run from command-line, for Sintra::Application.app_file.
+          # Also, line numbers are zero-based in JRuby's parser
+          vm.provider.runtime.current_context.set_file_and_line(app_file, 0)
+          # Run the app
+          vm.run_scriptlet org.jruby.embed.PathType::ABSOLUTE, app_file
+          # terminate launches at_exit hooks which start server
+          vm.terminate
+        end
+      end
+
+      def run
+        return unless installed?
+        kill
+        @thread  = start_vm
+        @started = Time.now
+        warn "#{server} up and running on port #{port}" if ping
+        at_exit { kill }
+      end
+
+      def log
+        String.from_java_bytes @pipe.to_byte_array
+      end
+
+      def kill
+        @thread.kill if @thread
+        @thread = nil
+      end
+    end
+    Server = JRubyServer
+  else
+    Server = BaseServer
+  end
+
   def it(message, &block)
     Server.each do |server|
       next unless server.installed?