More fleshing out of the users REST API.

* Add a 'uid factory' which allows us to return predictable unique ids for
  various testing purposes, e.g. user ids.  This should work even in the case
  of cross-subprocess uid generation.
* REST access to individual users, or the set of all users.
* User objects now have a created_on attribute.
* Users can be created through the web, but must have an email address.
* Add a [devmode] 'testing' variable for communicating to qrunner subprocesses
  that we're running in testing mode.  This allows us to coordinate factories
  and such in the qrunner processes.
* layers.is_testing() for more consistent API.
* Give AddressError a .address attribute for better diagnostics.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/mailman/rest/root.py b/src/mailman/rest/root.py
index 35bd8e12d..3287a6be2 100644
--- a/src/mailman/rest/root.py
+++ b/src/mailman/rest/root.py
@@ -34,7 +34,7 @@ from mailman.rest.domains import ADomain, AllDomains
 from mailman.rest.helpers import etag, path_to
 from mailman.rest.lists import AList, AllLists
 from mailman.rest.members import AllMembers
-from mailman.rest.users import AllUsers
+from mailman.rest.users import AUser, AllUsers
 
 
 
@@ -115,4 +115,6 @@ class TopLevel(resource.Resource):
         """/<api>/users"""
         if len(segments) == 0:
             return AllUsers()
-        return http.bad_request()
+        else:
+            user_id = segments.pop(0)
+            return AUser(user_id), segments