import pytest
from humansize import approximate_size


def test_1000():
    assert approximate_size(1000000000000, False) == "1.0 TB"


def test_1024():
    assert approximate_size(1000000000000) == "931.3 GiB"


def test_negative():
    with pytest.raises(ValueError):
        approximate_size(-1)


def test_huge_number():
    with pytest.raises(ValueError):
        approximate_size(1_000_000_000_000_000_000_000_000_000_000)