Validate the result of locale charmap

tests/test_app.py

@@ -515,6 +515,7 @@ class OtherTestBase(TestAppBase):
     tdstream = ''
     maxconn = 20
     origin = 'same'
+    encoding = ''
     body = {
         'hostname': '127.0.0.1',
         'port': '',
@@ -543,7 +544,8 @@ class OtherTestBase(TestAppBase):
         OtherTestBase.sshserver_port += 1
 
         t = threading.Thread(
-            target=run_ssh_server, args=(self.sshserver_port, self.running)
+            target=run_ssh_server,
+            args=(self.sshserver_port, self.running, self.encoding)
         )
         t.setDaemon(True)
         t.start()
@@ -762,3 +764,23 @@ class TestAppWithCrossOriginOperation(OtherTestBase):
         self.assertEqual(
             response.headers.get('Access-Control-Allow-Origin'), self.origin
         )
+
+
+class TestAppWithBadEncoding(OtherTestBase):
+
+    encoding = b'\xe7\xbc\x96\xe7\xa0\x81'
+
+    @tornado.testing.gen_test
+    def test_app_with_a_bad_encoding(self):
+        response = yield self.async_post('/', self.body)
+        self.assertIn(b'Bad encoding', response.body)
+
+
+class TestAppWithUnknownEncoding(OtherTestBase):
+
+    encoding = u'UnknownEncoding'
+
+    @tornado.testing.gen_test
+    def test_app_with_a_bad_encoding(self):
+        response = yield self.async_post('/', self.body)
+        self.assertIn(b'Unknown encoding', response.body)