def test_unmatched(self):
"""
`PolicyExceptionDetail.from_element` returns ``None`` if the element's
tag is not a policy exception detail.
"""
elem = L.WhatIsThis(L.foo('a'), L.bar('b'))
self.assertIdentical(None, PolicyExceptionDetail.from_element(elem))
def test_from_element(self):
"""
`PolicyExceptionDetail.from_element` returns a `PolicyExceptionDetail`
instance by parsing a ``PolicyExceptionDetail`` detail element.
"""
elem = PARLAYX_COMMON_NS.PolicyExceptionDetail(L.messageId('a'),
L.text('b'),
L.variables('c'),
L.variables('d'))
detail = PolicyExceptionDetail.from_element(elem)
self.assertEqual(('a', 'b', ['c', 'd']),
(detail.message_id, detail.text, detail.variables))
