diff -r 368c68ffb99e -r 5cd27d2cc64f server/test/unittest_hook.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/server/test/unittest_hook.py	Wed Sep 23 12:17:59 2009 +0200
@@ -0,0 +1,63 @@
+# -*- coding: utf-8 -*-
+"""unit/functional tests for cubicweb.server.hook
+
+:organization: Logilab
+:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
+:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
+:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
+"""
+
+from logilab.common.testlib import unittest_main
+
+from cubicweb.devtools.testlib import CubicWebTC
+from cubicweb.server.hook import LateOperation, Operation, SingleLastOperation
+from cubicweb.hooks import integrity, syncschema
+
+
+def clean_session_ops(func):
+    def wrapper(self, *args, **kwargs):
+        try:
+            return func(self, *args, **kwargs)
+        finally:
+            self.session.pending_operations[:] = []
+    return wrapper
+
+class HookHelpersTC(CubicWebTC):
+
+    def setUp(self):
+        CubicWebTC.setUp(self)
+        self.hm = self.repo.hm
+
+    @clean_session_ops
+    def test_late_operation(self):
+        session = self.session
+        l1 = LateOperation(session)
+        l2 = LateOperation(session)
+        l3 = Operation(session)
+        self.assertEquals(session.pending_operations, [l3, l1, l2])
+
+    @clean_session_ops
+    def test_single_last_operation(self):
+        session = self.session
+        l0 = SingleLastOperation(session)
+        l1 = LateOperation(session)
+        l2 = LateOperation(session)
+        l3 = Operation(session)
+        self.assertEquals(session.pending_operations, [l3, l1, l2, l0])
+        l4 = SingleLastOperation(session)
+        self.assertEquals(session.pending_operations, [l3, l1, l2, l4])
+
+    @clean_session_ops
+    def test_global_operation_order(self):
+        session = self.session
+        op1 = integrity._DelayedDeleteOp(session)
+        op2 = syncschema.MemSchemaRDefDel(session)
+        # equivalent operation generated by op2 but replace it here by op3 so we
+        # can check the result...
+        op3 = syncschema.MemSchemaNotifyChanges(session)
+        op4 = integrity._DelayedDeleteOp(session)
+        op5 = integrity._CheckORelationOp(session)
+        self.assertEquals(session.pending_operations, [op1, op2, op4, op5, op3])
+
+if __name__ == '__main__':
+    unittest_main()