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# BSD 3-Clause License; see https://github.com/scikit-hep/awkward/blob/main/LICENSE
from __future__ import annotations
import pytest # noqa: F401
import awkward as ak
from awkward._nplikes.shape import unknown_length
def test_known_scalar_regularization():
layout = ak.to_layout([1, 2, 3, 4, 5, 6]).to_typetracer(forget_length=False)
assert layout[:].length == 6
assert layout[:3].length == 3
assert layout[2:4].length == 2
assert layout[::-1].length == 6
def test_unknown_length_regularization():
layout = ak.to_layout([1, 2, 3, 4, 5, 6]).to_typetracer(forget_length=False)
assert layout[unknown_length::].length == unknown_length
assert layout[:unknown_length:].length == unknown_length
assert layout[::unknown_length].length == unknown_length
def test_unknown_scalar_regularization():
layout = ak.to_layout([1, 2, 3, 4, 5, 6]).to_typetracer(forget_length=False)
assert layout[layout[0] : :].length == unknown_length
assert layout[: layout[0]].length == unknown_length
assert layout[:: layout[0]].length == unknown_length
def test_slice_regularization_unknown_length():
layout = ak.to_layout([1, 2, 3, 4, 5, 6]).to_typetracer(forget_length=True)
assert layout[:].length == unknown_length
assert layout[:3].length == unknown_length
assert layout[2:4].length == unknown_length
assert layout[::-1].length == unknown_length
assert layout[unknown_length::].length == unknown_length
assert layout[:unknown_length:].length == unknown_length
assert layout[::unknown_length].length == unknown_length
assert layout[layout[0] : :].length == unknown_length
assert layout[: layout[0]].length == unknown_length
assert layout[:: layout[0]].length == unknown_length
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