from pre_commit_hooks import fix_byte_order_marker


def test_failure(tmpdir):
    f = tmpdir.join('f.txt')
    f.write_text('ohai', encoding='utf-8-sig')
    assert fix_byte_order_marker.main((str(f),)) == 1


def test_success(tmpdir):
    f = tmpdir.join('f.txt')
    f.write_text('ohai', encoding='utf-8')
    assert fix_byte_order_marker.main((str(f),)) == 0