def test_option_some_bind_none_fluent():
xs = Some(42)
ys = xs.bind(lambda x: Nothing)
for _ in ys.match(Nothing):
assert True
break
else:
assert False
def test_option_some_bind_fluent():
xs = Some(42)
ys = xs.bind(lambda x: Some(x + 1))
for value in ys.match(Some):
assert value == 43
break
else:
assert False