def test_nested_observables(self):
class FakeObservableIterator(observable.ObservableMixin):
def __iter__(self):
return iter([1, 2, 3])
# Coder for elements from the observable iterator.
elem_coder = coders.VarIntCoder()
iter_coder = coders.TupleSequenceCoder(elem_coder)
# Test nested WindowedValue observable.
coder = coders.WindowedValueCoder(iter_coder)
observ = FakeObservableIterator()
value = windowed_value.WindowedValue(observ, 0, ())
self.assertEqual(
coder.get_impl().get_estimated_size_and_observables(value)[1],
[(observ, elem_coder.get_impl())])
# Test nested tuple observable.
coder = coders.TupleCoder((coders.StrUtf8Coder(), iter_coder))
value = (u'123', observ)
self.assertEqual(
coder.get_impl().get_estimated_size_and_observables(value)[1],
[(observ, elem_coder.get_impl())])
def test_tuple_sequence_coder(self):
int_tuple_coder = coders.TupleSequenceCoder(coders.VarIntCoder())
self.check_coder(int_tuple_coder, (1, -1, 0), (), tuple(range(1000)))
self.check_coder(
coders.TupleCoder((coders.VarIntCoder(), int_tuple_coder)),
(1, (1, 2, 3)))