import os
import subprocess
import sys
import tempfile
from pathlib import Path
from unittest import TestCase, skipUnless


class GuiTest(TestCase):
    @skipUnless(os.environ.get('DISPLAY'), 'requires X11 for OpenGL widgets')
    def test_gui_isolated_from_hardware_and_closes_cleanly(self):
        env={**os.environ,'QT_QPA_PLATFORM':'xcb','ROS_DOMAIN_ID':'231','ROS_LOCALHOST_ONLY':'1'}
        with tempfile.TemporaryDirectory() as cache:
            env['XDG_CACHE_HOME']=cache
            result=subprocess.run([sys.executable,str(Path(__file__).with_name('gui_fixture.py'))],env=env,
                                  capture_output=True,text=True,timeout=20)
        self.assertEqual(result.returncode,0,result.stdout+'\n'+result.stderr)
        self.assertIn('shutdown PASS',result.stdout)