from src.jeb_utils.utils import find_nearest_lower_number
import pytest

@pytest.mark.parametrize('number_list,target,expected', [
    ([1, 2, 3], 2, 2),
    ([1, 2, 3], 3, 3),
    ([1, 2, 3], 0, None),
    ([1, 2, 3], 4, 3),
    ([], 0, None),
    ([], 1, None),
    ([], 2, None),
    ([], 42, None),
    ([1], 42, 1),
    ([1], 1, 1),
    ([1], 0, None),
])
def test_find_nearest_lower_number(number_list, target, expected):
    assert find_nearest_lower_number(number_list, target) == expected