def by_default_non_strings_are_not_accepted():
assert not is_description(None)
assert not is_description(b"bytes")
assert not is_description(0)
assert not is_description(42)
assert not is_description(("tuple",))
assert not is_description(["list"])
def after_registration_lazy_strings_are_accepted():
with registered(LazyString):
assert is_description("not lazy")
assert is_description(lazy_string)
assert not is_description(42)
def by_default_strings_are_accepted():
is_description("")
is_description("text")