Pillow/Tests/test_image_load.py

import logging
import os

import pytest

from PIL import Image

from .helper import hopper


def test_sanity():
    im = hopper()
    pix = im.load()

    assert pix[0, 0] == (20, 20, 70)


def test_close():
    im = Image.open("Tests/images/hopper.gif")
    im.close()
    with pytest.raises(ValueError):
        im.load()
    with pytest.raises(ValueError):
        im.getpixel((0, 0))


def test_close_after_load(caplog):
    im = Image.open("Tests/images/hopper.gif")
    im.load()
    with caplog.at_level(logging.DEBUG):
        im.close()
    assert len(caplog.records) == 0


def test_contextmanager():
    fn = None
    with Image.open("Tests/images/hopper.gif") as im:
        fn = im.fp.fileno()
        os.fstat(fn)

    with pytest.raises(OSError):
        os.fstat(fn)


def test_contextmanager_non_exclusive_fp():
    with open("Tests/images/hopper.gif", "rb") as fp:
        with Image.open(fp):
            pass

        assert not fp.closed