add vendor back

vendor/rack-test/lib/rack/test/mock_digest_request.rb

@@ -0,0 +1,27 @@
+module Rack
+  module Test
+
+    class MockDigestRequest
+      def initialize(params)
+        @params = params
+      end
+
+      def method_missing(sym)
+        if @params.has_key? k = sym.to_s
+          return @params[k]
+        end
+
+        super
+      end
+
+      def method
+        @params['method']
+      end
+
+      def response(password)
+        Rack::Auth::Digest::MD5.new(nil).send :digest, self, password
+      end
+    end
+
+  end
+end