Add a test for HTTPError.__str__ when it uses httputils.

diff --git a/tornado/test/web_test.py b/tornado/test/web_test.py
index 7ae3d874536729f2b9d86a53d0456923cc843f39..906dcf702b4a39c4e32816ca57437f761be9071f 100644 (file)
--- a/tornado/test/web_test.py
+++ b/tornado/test/web_test.py
@@ -1476,6 +1476,8 @@ class RaiseWithReasonTest(SimpleHandlerTestCase):
     def test_httperror_str(self):
         self.assertEqual(str(HTTPError(682, reason="Foo")), "HTTP 682: Foo")
 
+    def test_httperror_str_from_httputil(self):
+        self.assertEqual(str(HTTPError(682)), "HTTP 682: Unknown")
 
 @wsgi_safe
 class ErrorHandlerXSRFTest(WebTestCase):