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# BSD 3-Clause License; see https://github.com/scikit-hep/awkward/blob/main/LICENSE
from __future__ import annotations
import numpy as np # noqa: F401
import pytest # noqa: F401
import awkward as ak
def test():
array = ak.Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
assert ak.operations.unflatten(array, 5).to_list() == [
[0, 1, 2, 3, 4],
[5, 6, 7, 8, 9],
]
assert ak.operations.unflatten(array, [3, 0, 2, 1, 4]).to_list() == [
[0, 1, 2],
[],
[3, 4],
[5],
[6, 7, 8, 9],
]
assert ak.operations.unflatten(array, [3, None, 2, 1, 4]).to_list() == [
[0, 1, 2],
None,
[3, 4],
[5],
[6, 7, 8, 9],
]
original = ak.Array([[0, 1, 2], [], [3, 4], [5], [6, 7, 8, 9]])
counts = ak.operations.num(original)
array = ak.operations.flatten(original)
assert counts.to_list() == [3, 0, 2, 1, 4]
assert array.to_list() == [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
assert ak.operations.unflatten(array, counts).to_list() == [
[0, 1, 2],
[],
[3, 4],
[5],
[6, 7, 8, 9],
]
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