diff -r 058bb3dc685f -r 0b59724cb3f2 cubicweb/server/test/data-schema2sql/schema/Dates.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/server/test/data-schema2sql/schema/Dates.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,28 @@
+# copyright 2004-2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of yams.
+#
+# yams is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# yams is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with yams. If not, see <http://www.gnu.org/licenses/>.
+from datetime import time, date
+from yams.buildobjs import EntityType, Datetime, Date, Time
+from yams.constraints import TODAY, BoundaryConstraint
+
+class Datetest(EntityType):
+    dt1 = Datetime(default=u'now')
+    dt2 = Datetime(default=u'today')
+    d1  = Date(default=u'today', constraints=[BoundaryConstraint('<=', TODAY())])
+    d2  = Date(default=date(2007, 12, 11))
+    t1  = Time(default=time(8, 40))
+    t2  = Time(default=time(9, 45))