def test_tracestate_add_invalid(self):
state = TraceState()
new_state = state.add("%%%nsasa", "val")
self.assertEqual(len(new_state), 0)
new_state = new_state.add("key", "====val====")
self.assertEqual(len(new_state), 0)
self.assertEqual(new_state.to_header(), "")
def test_tracestate_add_valid(self):
state = TraceState()
new_state = state.add("1a-2f@foo", "bar4")
self.assertEqual(len(new_state), 1)
self.assertEqual(new_state.get("1a-2f@foo"), "bar4")