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'''Helper classes and functions'''

import unittest

from PySide2.QtCore import QTimer
from PySide2.QtWidgets import QApplication


class TimedQApplication(unittest.TestCase):
    '''Helper class with timed QApplication exec loop'''

    def setUp(self, timeout=100):
        '''Setups this Application.

        timeout - timeout in milisseconds'''
        self.app = QApplication.instance() or QApplication([])
        QTimer.singleShot(timeout, self.app.quit)

    def tearDown(self):
        '''Delete resources'''
        del self.app