'Asserts whether a sequence or collection is empty
:param items: sequence or collection to be tested
:param msg: message to be passed to the AssertionError
:raises AssertionError: when items is not empty'

def assertEmpty(self, items, msg=None):

    if (msg is None):
        msg = ('sequence    or    collection    is    not    empty:    %s' % items)
    self.assertFalse(items, msg)
