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"""
PyQt/PySide stress test:
Create lots of random widgets and graphics items, connect them together randomly,
the tear them down repeatedly.
The purpose of this is to attempt to generate segmentation faults.
"""
import gc
import sys
import time
import weakref
from random import randint, seed
import pyqtgraph as pg
from pyqtgraph.Qt import QtTest
from pyqtgraph.util.garbage_collector import GarbageCollector
app = pg.mkQApp()
def test_garbage_collector():
GarbageCollector(interval=0.1)
time.sleep(1)
seed(12345)
widgetTypes = [
pg.PlotWidget,
pg.ImageView,
pg.GraphicsView,
pg.QtWidgets.QWidget,
pg.QtWidgets.QTreeWidget,
pg.QtWidgets.QPushButton,
]
itemTypes = [
pg.PlotCurveItem,
pg.ImageItem,
pg.PlotDataItem,
pg.ViewBox,
pg.QtWidgets.QGraphicsRectItem
]
widgets = []
items = []
allWidgets = weakref.WeakKeyDictionary()
def crashtest():
global allWidgets
try:
gc.disable()
actions = [
createWidget,
#setParent,
forgetWidget,
showWidget,
processEvents,
#raiseException,
#addReference,
]
thread = WorkThread()
thread.start()
while True:
try:
action = randItem(actions)
action()
print('[%d widgets alive, %d zombie]' % (len(allWidgets), len(allWidgets) - len(widgets)))
except KeyboardInterrupt:
print("Caught interrupt; send another to exit.")
try:
for _ in range(100):
QtTest.QTest.qWait(100)
except KeyboardInterrupt:
thread.terminate()
break
except:
sys.excepthook(*sys.exc_info())
finally:
gc.enable()
class WorkThread(pg.QtCore.QThread):
'''Intended to give the gc an opportunity to run from a non-gui thread.'''
def run(self):
i = 0
while True:
i += 1
if (i % 1000000) == 0:
print('--worker--')
def randItem(items):
return items[randint(0, len(items)-1)]
def p(msg):
print(msg)
sys.stdout.flush()
def createWidget():
p('create widget')
global widgets, allWidgets
if len(widgets) > 50:
return None
widget = randItem(widgetTypes)()
widget.setWindowTitle(widget.__class__.__name__)
widgets.append(widget)
allWidgets[widget] = 1
p(" %s" % widget)
return widget
def setParent():
p('set parent')
global widgets
if len(widgets) < 2:
return
child = parent = None
while child is parent:
child = randItem(widgets)
parent = randItem(widgets)
p(" %s parent of %s" % (parent, child))
child.setParent(parent)
def forgetWidget():
p('forget widget')
global widgets
if len(widgets) < 1:
return
widget = randItem(widgets)
p(' %s' % widget)
widgets.remove(widget)
def showWidget():
p('show widget')
global widgets
if len(widgets) < 1:
return
widget = randItem(widgets)
p(' %s' % widget)
widget.show()
def processEvents():
p('process events')
QtTest.QTest.qWait(25)
class TstException(Exception):
pass
def raiseException():
p('raise exception')
raise TstException("A test exception")
def addReference():
p('add reference')
global widgets
if len(widgets) < 1:
return
obj1 = randItem(widgets)
obj2 = randItem(widgets)
p(' %s -> %s' % (obj1, obj2))
obj1._testref = obj2
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