def test_bytes(self):
res = t.FromBytes().check(b"foo")
assert res == 'foo'
res = t.FromBytes()(b"")
assert res == ''
res = t.FromBytes().check(b"")
assert res == ''
res = extract_error(t.FromBytes(), 1)
assert res == 'value is not a bytes'
def test_repr(self):
res = t.FromBytes()
assert repr(res) == '<FromBytes>'