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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
import awkward as ak
to_list = ak.operations.to_list
def test_empty_arrays_cartesian():
one = ak.Array([])
two = one = ak.Array([])
with pytest.raises(ValueError) as err:
to_list(ak.operations.cartesian([one, two]))
assert isinstance(err.value, ValueError)
to_list(ak.operations.concatenate([one, two], axis=0))
def test_cartesian():
muon = ak.Array([[{"pt": 1.0}], []], with_name="muon")
electron = ak.Array([[], [{"pt": 1.0}]], with_name="electron")
muon = muon[muon.pt > 5]
electron = electron[electron.pt > 5]
leptons = ak.operations.concatenate([muon, electron], axis=1)
candidate = ak.operations.firsts(leptons)
assert to_list(ak.Array(candidate)) == [None, None]
result = ak.operations.cartesian([candidate, candidate], axis=0)
assert to_list(result) == [
(None, None),
(None, None),
(None, None),
(None, None),
]
result = ak.operations.cartesian([candidate, ak.Array([[1, 2, 3], []])], axis=1)
assert to_list(result) == [None, None]
one, two = ak.operations.broadcast_arrays(candidate, ak.Array([[1, 2, 3], []]))
assert to_list(one) == [None, None]
assert to_list(two) == [None, None]
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