Problem with `Optional` in more complex definitions

[vltr]

middle/tests/test_types.py

Lines 953 to 969 in d3fc3f9

	@pytest.mark.xfail # ! TODO - this shoud not fail on pytest.raises
	def test_tuple_no_optional():
	opt_tup = t.Tuple[float, int]
	class TestModel(middle.Model):
	value = middle.field(
	type=t.Dict[int, t.Tuple[opt_tup, opt_tup, opt_tup, opt_tup]]
	)
	inst = TestModel(value={1: [[0.9, 1], [0.9, 1], [2.1, 2], [2.1, 2]]})
	assert inst.value[1][0] == (0.9, 1)
	assert inst.value[1][1] == (0.9, 1)
	assert inst.value[1][2] == (2.1, 2)
	assert inst.value[1][3] == (2.1, 2)
	with pytest.raises(ValidationError):
	TestModel(value={5: [[0.9, 1], None, [2.1, 2], None]})

The definition above should produce a ValidationError, since it's not Optional, hence the values on given for Tuples must not be null or None.