import pytest


@pytest.mark.parametrize(
    'batch_size,storefronts_number,expected', [
        (100, 2, 50),
        (100, 100, 1),
        (
            123,
            100,
            1,
        ),
    ]
)
def test_service_calculate_number_of_entities(
    service, batch_size: int, storefronts_number: int, expected: int
):
    result = service.calculate_number_of_entities(batch_size, storefronts_number)
    assert result == expected


@pytest.mark.parametrize(
    'batch_size,storefronts_number,expected', [
        (0, 2, ValueError),
        (100, 0, ValueError),
        (-100, 1, ValueError),
    ]
)
def test_service_calculate_number_of_entities_raises_error(
    service, batch_size: int, storefronts_number: int, expected: Exception
):
    with pytest.raises(expected):
        service.calculate_number_of_entities(batch_size, storefronts_number)