'Verify that all items has keys listed in field_names.
:param items: items to assert are field names in the output table
:type items: list
:param field_names: field names from the output table of the cmd
:type field_names: list'

def assertTableStruct(self, items, field_names):

    for item in items:
        for field in field_names:
            self.assertIn(field, item)
