Add failing test.

Author: bitdancer

Lib/test/test_email/test_headerregistry.py

@@ -1271,12 +1271,12 @@ class TestAddressHeader(TestHeaderBase):
              'example.com',
              None),
 
-        }
-
         # XXX: Need many more examples, and in particular some with names in
         # trailing comments, which aren't currently handled.  comments in
         # general are not handled yet.
 
+        }
+
     def example_as_address(self, source, defects, decoded, display_name,
                            addr_spec, username, domain, comment):
         h = self.make_header('sender', source)
@@ -1294,6 +1294,43 @@ def example_as_address(self, source, defects, decoded, display_name,
         # XXX: we have no comment support yet.
         #self.assertEqual(a.comment, comment)
 
+    example_broken_header_params = {
+
+        'just_dquote':
+            ('"',
+             [errors.InvalidHeaderDefect]*2,
+             '<>',
+             '',
+             '<>',
+             '',
+             '',
+            ),
+
+        }
+
+    def example_broken_header_as_address(
+            self,
+            source,
+            defects,
+            decoded,
+            display_name,
+            addr_spec,
+            username,
+            domain,
+        ):
+        h = self.make_header('sender', source)
+        self.assertEqual(h, decoded)
+        self.assertDefectsEqual(h.defects, defects)
+        a = h.address
+        self.assertEqual(str(a), decoded)
+        self.assertEqual(len(h.groups), 1)
+        self.assertEqual([a], list(h.groups[0].addresses))
+        self.assertEqual([a], list(h.addresses))
+        self.assertEqual(a.display_name, display_name)
+        self.assertEqual(a.addr_spec, addr_spec)
+        self.assertEqual(a.username, username)
+        self.assertEqual(a.domain, domain)
+
     def example_as_group(self, source, defects, decoded, display_name,
                          addr_spec, username, domain, comment):
         source = 'foo: {};'.format(source)