From c8a750e9fd0da7216d7ac9b8b3ab47a35df03806 Mon Sep 17 00:00:00 2001
From: Rey Abolofia <rabolofia@newrelic.com>
Date: Tue, 31 Jul 2018 11:19:49 -0700
Subject: [PATCH] Test configure with string input.

---
 tornado/test/util_test.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tornado/test/util_test.py b/tornado/test/util_test.py
index a8c2cc094..59b13ad01 100644
--- a/tornado/test/util_test.py
+++ b/tornado/test/util_test.py
@@ -120,6 +120,18 @@ class ConfigurableTest(unittest.TestCase):
 
         self.checkSubclasses()
 
+    def test_config_str(self):
+        TestConfigurable.configure('tornado.test.util_test.TestConfig2')
+        obj = TestConfigurable()
+        self.assertIsInstance(obj, TestConfig2)
+        self.assertIs(obj.b, None)
+
+        obj = TestConfigurable(b=2)
+        self.assertIsInstance(obj, TestConfig2)
+        self.assertEqual(obj.b, 2)
+
+        self.checkSubclasses()
+
     def test_config_args(self):
         TestConfigurable.configure(None, a=3)
         obj = TestConfigurable()
-- 
2.47.2