Vendor Rack 1.0.1

Incorporate patch from Revision 496.

vendor/plugins/rack/test/spec_rack_lock.rb

@@ -0,0 +1,38 @@
+require 'test/spec'
+
+require 'rack/mock'
+require 'rack/lock'
+
+context "Rack::Lock" do
+  class Lock
+    attr_reader :synchronized
+
+    def initialize
+      @synchronized = false
+    end
+
+    def synchronize
+      @synchronized = true
+      yield
+    end
+  end
+
+  specify "should call synchronize on lock" do
+    lock = Lock.new
+    env = Rack::MockRequest.env_for("/")
+    app = Rack::Lock.new(lambda { |env| }, lock)
+    lock.synchronized.should.equal false
+    app.call(env)
+    lock.synchronized.should.equal true
+  end
+
+  specify "should set multithread flag to false" do
+    app = Rack::Lock.new(lambda { |env| env['rack.multithread'] })
+    app.call(Rack::MockRequest.env_for("/")).should.equal false
+  end
+
+  specify "should reset original multithread flag when exiting lock" do
+    app = Rack::Lock.new(lambda { |env| env })
+    app.call(Rack::MockRequest.env_for("/"))['rack.multithread'].should.equal true
+  end
+end