# 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

to_list = ak.operations.to_list


def test_getitem_field():
    a1 = ak.operations.zip(
        {"a": [[1], [], [2, 3]], "b": [[4], [], [5, 6]]}, with_name="a1"
    )
    a2 = ak.operations.zip(
        {"a": [[7, 8], [9], []], "b": [[10, 11], [12], []]}, with_name="a2"
    )
    union = ak.operations.where([True, False, True], a1, a2)

    assert str(union.a.type) == "3 * var * int64"


def test_flatten_axis_none():
    a1 = ak.operations.zip(
        {"a": [[1], [], [2, 3]], "b": [[4], [], [5, 6]]}, with_name="a1"
    )
    a2 = ak.operations.zip(
        {"a": [[7, 8], [9], []], "b": [[10, 11], [12], []]}, with_name="a2"
    )

    union = ak.operations.where([True, False, True], a1, a2)
    assert set(ak.operations.flatten(union, axis=None)) == {
        1,
        2,
        3,
        4,
        5,
        6,
        9,
        12,
    }
