Initial version of Excon::Test::Sever

 - Added Excon::Test::Server
 - Added Excon::Test::Plugin::Server::Rackup
 - Added initial spec for Excon::Test::Server and Rackup plugin
 - Added rackup_path to spec_helper

lib/excon/test/plugin/server/rackup.rb

@@ -0,0 +1,20 @@
+module Excon
+  module Test
+    module Plugin
+      module Server
+        module Rackup
+          def start(app_str = app, bind_str = bind)
+            open_process('rackup', '--host', bind, app)
+            line = ''
+            until line =~ /HTTPServer#start:|Use Ctrl-C to stop/
+              line = RUBY_PLATFORM == 'java' ? read.gets : error.gets
+              fatal_time = elapsed_time > timeout
+              raise 'rackup server has taken too long to start' if fatal_time
+            end
+            true
+          end
+        end
+      end
+    end
+  end
+end

lib/excon/test/server.rb

@@ -0,0 +1,86 @@
+require 'open4'
+require 'excon'
+require 'excon/test/plugin/server/rackup'
+
+module Excon
+  module Test
+    class Server
+      attr_accessor :app, :server, :bind, :pid, :read, :write, :error, :started_at, :timeout
+
+      # Methods that must be implemented by a plugin
+      INSTANCE_REQUIRES = [:start]
+      Excon.defaults.merge!(
+        connect_timeout: 5,
+        read_timeout: 5,
+        write_timeout: 5
+      )
+
+      def initialize(args)
+        # TODO: Validate these args
+        @server = args.keys.first
+        @app = args[server]
+        @bind = args[:bind]
+        if args[:timeout]
+          @timeout = args[:timeout]
+        else
+          # Double the default timeout if jruby because of the startup cost
+          @timeout = RUBY_PLATFORM == "java" ? 20 : 10
+        end
+        name = @server.to_s.split('_').collect(&:capitalize).join
+        plug = "Excon::Test::Plugin::Server::#{name}"
+        self.extend Kernel.const_get plug
+        check_implementation(plug)
+      end
+
+      private def check_implementation(plug)
+        INSTANCE_REQUIRES.each do |m|
+          unless self.respond_to? m
+            raise "FATAL: #{plug} does not implement ##{m}"
+          end
+        end
+      end
+
+      def open_process(*args)
+        if RUBY_PLATFORM == 'java'
+          @pid, @write, @read, @error = IO.popen4(*args)
+        else
+          GC.disable if RUBY_VERSION < '1.9'
+          @pid, @write, @read, @error = Open4.popen4(*args)
+        end
+        @started_at = Time.now
+      end
+
+      def elapsed_time
+        Time.now - started_at
+      end
+
+      def stop
+        if RUBY_PLATFORM == 'java'
+          Process.kill('USR1', pid)
+        else
+          Process.kill(9, pid)
+          GC.enable if RUBY_VERSION < '1.9'
+          Process.wait(pid)
+        end
+        # TODO: Ensure process is really dead
+        dump_errors
+        true
+      end
+      def dump_errors
+        lines = error.read.split($INPUT_RECORD_SEPARATOR)
+        while line = lines.shift
+          case line
+            when /(ERROR|Error)/
+              unless line =~ /(null cert chain|did not return a certificate|SSL_read:: internal error)/
+                in_err = true
+                puts
+              end
+            when /^(127|localhost)/
+              in_err = false
+            end
+          puts line if in_err
+        end
+      end
+    end
+  end
+end

spec/excon_test_server_spec.rb

@@ -0,0 +1,12 @@
+require 'spec_helper'
+
+describe Excon::Test::Server do
+  context 'when rackup' do
+    it 'starts a new a app' do
+      instance = Excon::Test::Server.new(rackup: rackup_path('basic.ru'),  bind: '127.0.0.1')
+      expect(instance).to be_a(Excon::Test::Server)
+      expect(instance.start).to be true
+      expect(instance.stop).to be true
+    end
+  end
+end

spec/spec_helper.rb

@@ -1,4 +1,5 @@
 require 'excon'
+require 'excon/test/server'
 
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
@@ -102,4 +103,15 @@
   # as the one that triggered the failure.
   Kernel.srand config.seed
 =end
+
+end
+
+def rackup_path(*parts)
+  File.join(File.expand_path('../..', __FILE__), 'tests', 'rackups', *parts)
 end
+
+# TODO: Delete above method and uncommend this one when rackup tests are
+# ported
+#def rackup_path(*parts)
+#    File.expand_path(File.join(File.dirname(__FILE__), 'rackups', *parts))
+#end