erp5_workflow_test_data: check workflow history keys and their values in live test.

bt5/erp5_workflow_test_data/TestTemplateItem/portal_components/test.erp5.testWorkflowAndDCWorkflow.py

@@ -250,6 +250,12 @@ class TestDCWorkflow(TestERP5WorkflowMixin):
     checkLine({'state': 'invalidated'}, 4)
     # check history keys are identical before and after conversion.
     self.assertEqual(sorted(item_list[2].keys()),sorted(item_list[4].keys()))
+    # check key values are shown as expected; 
+    expected_item_dict = {'comment': '', 'error_message': '', 'actor': 'ERP5TypeTestCase', 'state': 'invalidated', 'action': 'invalidate'}
+    for key in expected_item_dict:
+      self.assertEqual(item_list[4].getProperty(key), expected_item_dict[key])
+    # check date time is generated
+    self.assertTrue(item_list[4].getProperty('time') is not None)
 
 def test_suite():
   suite = unittest.TestSuite()