from __future__ import annotations

import subprocess
import sys


def test_import(benchmark):
    # on py37+ the "-X importtime" usage gives us a more precise
    #  measurement of the import time we actually care about,
    #  without the subprocess or interpreter overhead

    cmd = [sys.executable, "-X", "importtime", "-c", "import pint"]
    p = subprocess.run(cmd, stderr=subprocess.PIPE)

    line = p.stderr.splitlines()[-1]
    field = line.split(b"|")[-2].strip()
    total = int(field)  # microseconds
    return total