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import os
import sys
import threading
from time import sleep
import pytest
from pyvirtualdisplay.display import Display
from easyprocess import EasyProcess
python = sys.executable
# requirement: apt install imagemagick
# deadlock
# popen.communicate() hangs
# no deadlock with temp_files
PROG = """
from PIL import Image
Image.new("RGB",(99, 99)).show()
"""
EASYPROCESS_USE_TEMP_FILES = os.environ.get("EASYPROCESS_USE_TEMP_FILES")
def test_dummy():
pass
# skip these tests for Windows/Mac
# and when 'use_temp_files' is forced by env variable
if sys.platform.startswith("linux") and not EASYPROCESS_USE_TEMP_FILES:
def test_has_imagemagick():
assert EasyProcess(["display", "-version"]).call().return_code == 0
@pytest.mark.timeout(120)
def test_deadlock_temp_files():
with Display():
p = EasyProcess(
[
python,
"-c",
PROG,
],
use_temp_files=True,
)
p.start()
sleep(2)
# hangs with pipes
p.stop()
@pytest.mark.timeout(120)
def test_deadlock_pipe():
with Display():
p = EasyProcess(
[
python,
"-c",
PROG,
],
use_temp_files=False,
)
p.start()
sleep(2)
def start():
# hangs with pipes
p.stop()
thread = threading.Thread(target=start)
thread.start()
sleep(6)
assert thread.is_alive()
thread.join()
|
