+-- Prosody IM
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+function join(join)
+ assert_equal(join("a", "b", "c"), "a@b/c", "builds full JID");
+ assert_equal(join("a", "b", nil), "a@b", "builds bare JID");
+ assert_equal(join(nil, "b", "c"), "b/c", "builds full host JID");
+ assert_equal(join(nil, "b", nil), "b", "builds bare host JID");
+ assert_equal(join(nil, nil, nil), nil, "invalid JID is nil");
+ assert_equal(join("a", nil, nil), nil, "invalid JID is nil");
+ assert_equal(join(nil, nil, "c"), nil, "invalid JID is nil");
+ assert_equal(join("a", nil, "c"), nil, "invalid JID is nil");
+end
+