--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/regressiontests/builtin_server/tests.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,51 @@
+from unittest import TestCase
+from StringIO import StringIO
+from django.core.servers.basehttp import ServerHandler
+
+#
+# Tests for #9659: wsgi.file_wrapper in the builtin server.
+# We need to mock a couple of of handlers and keep track of what
+# gets called when using a couple kinds of WSGI apps.
+#
+
+class DummyHandler(object):
+    def log_request(*args, **kwargs):
+        pass
+
+class FileWrapperHandler(ServerHandler):
+    def __init__(self, *args, **kwargs):
+        ServerHandler.__init__(self, *args, **kwargs)
+        self.request_handler = DummyHandler()
+        self._used_sendfile = False
+
+    def sendfile(self):
+        self._used_sendfile = True
+        return True
+
+def wsgi_app(environ, start_response):
+    start_response('200 OK', [('Content-Type', 'text/plain')])
+    return ['Hello World!']
+
+def wsgi_app_file_wrapper(environ, start_response):
+    start_response('200 OK', [('Content-Type', 'text/plain')])
+    return environ['wsgi.file_wrapper'](StringIO('foo'))
+
+class WSGIFileWrapperTests(TestCase):
+    """
+    Test that the wsgi.file_wrapper works for the builting server.
+    """
+
+    def test_file_wrapper_uses_sendfile(self):
+        env = {'SERVER_PROTOCOL': 'HTTP/1.0'}
+        err = StringIO()
+        handler = FileWrapperHandler(None, StringIO(), err, env)
+        handler.run(wsgi_app_file_wrapper)
+        self.assert_(handler._used_sendfile)
+
+    def test_file_wrapper_no_sendfile(self):
+        env = {'SERVER_PROTOCOL': 'HTTP/1.0'}
+        err = StringIO()
+        handler = FileWrapperHandler(None, StringIO(), err, env)
+        handler.run(wsgi_app)
+        self.assertFalse(handler._used_sendfile)
+        self.assertEqual(handler.stdout.getvalue().splitlines()[-1],'Hello World!')