# coding: utf-8 # /*########################################################################## # # Copyright (c) 2016-2020 European Synchrotron Radiation Facility # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # # ###########################################################################*/ """Helper class to write Qt widget unittests.""" __authors__ = ["T. Vincent"] __license__ = "MIT" __date__ = "05/10/2018" import gc import logging import unittest import time import functools import sys import os _logger = logging.getLogger(__name__) from silx.gui import qt from silx.gui.qt import inspect as _inspect if qt.BINDING == 'PySide': from PySide.QtTest import QTest elif qt.BINDING == 'PySide2': from PySide2.QtTest import QTest elif qt.BINDING == 'PyQt5': from PyQt5.QtTest import QTest elif qt.BINDING == 'PyQt4': from PyQt4.QtTest import QTest else: raise ImportError('Unsupported Qt bindings') # Qt4/Qt5 compatibility wrapper if qt.BINDING in ('PySide', 'PyQt4'): _logger.info("QTest.qWaitForWindowExposed not available," + "using QTest.qWaitForWindowShown instead.") def qWaitForWindowExposed(window, timeout=None): """Mimic QTest.qWaitForWindowExposed for Qt4.""" QTest.qWaitForWindowShown(window) return True else: qWaitForWindowExposed = QTest.qWaitForWindowExposed def qWaitForWindowExposedAndActivate(window, timeout=None): """Waits until the window is shown in the screen. It also activates the window and raises it. See QTest.qWaitForWindowExposed for details. """ if timeout is None: result = qWaitForWindowExposed(window) else: result = qWaitForWindowExposed(window, timeout) if result: # Makes sure window is active and on top window.activateWindow() window.raise_() return result class TestCaseQt(unittest.TestCase): """Base class to write test for Qt stuff. It creates a QApplication before running the tests. WARNING: The QApplication is shared by all tests, which might have side effects. After each test, this class is checking for widgets remaining alive. To allow some widgets to remain alive at the end of a test, set the allowedLeakingWidgets attribute to the number of widgets that can remain alive at the end of the test. With PySide, this test is not run for now as it seems PySide is leaking widgets internally. All keyboard and mouse event simulation methods call qWait(20) after simulating the event (as QTest does on Mac OSX). This was introduced to fix issues with continuous integration tests running with Xvfb on Linux. """ DEFAULT_TIMEOUT_WAIT = 100 """Default timeout for qWait""" TIMEOUT_WAIT = 0 """Extra timeout in millisecond to add to qSleep, qWait and qWaitForWindowExposed. Intended purpose is for debugging, to add extra time to waits in order to allow to view the tested widgets. """ _qapp = None """Placeholder for QApplication""" @classmethod def exceptionHandler(cls, exceptionClass, exception, stack): import traceback message = (''.join(traceback.format_tb(stack))) template = 'Traceback (most recent call last):\n{2}{0}: {1}' message = template.format(exceptionClass.__name__, exception, message) cls._exceptions.append(message) @classmethod def setUpClass(cls): """Makes sure Qt is inited""" cls._oldExceptionHook = sys.excepthook sys.excepthook = cls.exceptionHandler # Makes sure a QApplication exists and do it once for all if not qt.QApplication.instance(): cls._qapp = qt.QApplication([]) @classmethod def tearDownClass(cls): sys.excepthook = cls._oldExceptionHook def setUp(self): """Get the list of existing widgets.""" self.allowedLeakingWidgets = 0 self.__previousWidgets = self.qapp.allWidgets() self.__class__._exceptions = [] def _currentTestSucceeded(self): if hasattr(self, '_outcome'): # For Python >= 3.4 result = self.defaultTestResult() # these 2 methods have no side effects if hasattr(self._outcome, 'errors'): self._feedErrorsToResult(result, self._outcome.errors) else: # For Python < 3.4 result = getattr(self, '_outcomeForDoCleanups', self._resultForDoCleanups) skipped = self.id() in [case.id() for case, _ in result.skipped] error = self.id() in [case.id() for case, _ in result.errors] failure = self.id() in [case.id() for case, _ in result.failures] return not error and not failure and not skipped def _checkForUnreleasedWidgets(self): """Test fixture checking that no more widgets exists.""" gc.collect() widgets = [widget for widget in self.qapp.allWidgets() if (widget not in self.__previousWidgets and _inspect.createdByPython(widget))] del self.__previousWidgets if qt.BINDING in ('PySide', 'PySide2'): return # Do not test for leaking widgets with PySide allowedLeakingWidgets = self.allowedLeakingWidgets self.allowedLeakingWidgets = 0 if widgets and len(widgets) <= allowedLeakingWidgets: _logger.info( '%s: %d remaining widgets after test' % (self.id(), len(widgets))) if len(widgets) > allowedLeakingWidgets: raise RuntimeError( "Test ended with widgets alive: %s" % str(widgets)) def tearDown(self): if len(self.__class__._exceptions) > 0: messages = "\n".join(self.__class__._exceptions) raise AssertionError("Exception occured in Qt thread:\n" + messages) if self._currentTestSucceeded(): self._checkForUnreleasedWidgets() @property def qapp(self): """The QApplication currently running.""" return qt.QApplication.instance() # Proxy to QTest Press = QTest.Press """Key press action code""" Release = QTest.Release """Key release action code""" Click = QTest.Click """Key click action code""" QTest = property(lambda self: QTest, doc="""The Qt QTest class from the used Qt binding.""") def keyClick(self, widget, key, modifier=qt.Qt.NoModifier, delay=-1): """Simulate clicking a key. See QTest.keyClick for details. """ QTest.keyClick(widget, key, modifier, delay) self.qWait(20) def keyClicks(self, widget, sequence, modifier=qt.Qt.NoModifier, delay=-1): """Simulate clicking a sequence of keys. See QTest.keyClick for details. """ QTest.keyClicks(widget, sequence, modifier, delay) self.qWait(20) def keyEvent(self, action, widget, key, modifier=qt.Qt.NoModifier, delay=-1): """Sends a Qt key event. See QTest.keyEvent for details. """ QTest.keyEvent(action, widget, key, modifier, delay) self.qWait(20) def keyPress(self, widget, key, modifier=qt.Qt.NoModifier, delay=-1): """Sends a Qt key press event. See QTest.keyPress for details. """ QTest.keyPress(widget, key, modifier, delay) self.qWait(20) def keyRelease(self, widget, key, modifier=qt.Qt.NoModifier, delay=-1): """Sends a Qt key release event. See QTest.keyRelease for details. """ QTest.keyRelease(widget, key, modifier, delay) self.qWait(20) def mouseClick(self, widget, button, modifier=None, pos=None, delay=-1): """Simulate clicking a mouse button. See QTest.mouseClick for details. """ if modifier is None: modifier = qt.Qt.KeyboardModifiers() pos = qt.QPoint(int(pos[0]), int(pos[1])) if pos is not None else qt.QPoint() QTest.mouseClick(widget, button, modifier, pos, delay) self.qWait(20) def mouseDClick(self, widget, button, modifier=None, pos=None, delay=-1): """Simulate double clicking a mouse button. See QTest.mouseDClick for details. """ if modifier is None: modifier = qt.Qt.KeyboardModifiers() pos = qt.QPoint(int(pos[0]), int(pos[1])) if pos is not None else qt.QPoint() QTest.mouseDClick(widget, button, modifier, pos, delay) self.qWait(20) def mouseMove(self, widget, pos=None, delay=-1): """Simulate moving the mouse. See QTest.mouseMove for details. """ pos = qt.QPoint(int(pos[0]), int(pos[1])) if pos is not None else qt.QPoint() QTest.mouseMove(widget, pos, delay) self.qWait(20) def mousePress(self, widget, button, modifier=None, pos=None, delay=-1): """Simulate pressing a mouse button. See QTest.mousePress for details. """ if modifier is None: modifier = qt.Qt.KeyboardModifiers() pos = qt.QPoint(int(pos[0]), int(pos[1])) if pos is not None else qt.QPoint() QTest.mousePress(widget, button, modifier, pos, delay) self.qWait(20) def mouseRelease(self, widget, button, modifier=None, pos=None, delay=-1): """Simulate releasing a mouse button. See QTest.mouseRelease for details. """ if modifier is None: modifier = qt.Qt.KeyboardModifiers() pos = qt.QPoint(int(pos[0]), int(pos[1])) if pos is not None else qt.QPoint() QTest.mouseRelease(widget, button, modifier, pos, delay) self.qWait(20) def qSleep(self, ms): """Sleep for ms milliseconds, blocking the execution of the test. See QTest.qSleep for details. """ QTest.qSleep(int(ms) + self.TIMEOUT_WAIT) @classmethod def qWait(cls, ms=None): """Waits for ms milliseconds, events will be processed. See QTest.qWait for details. """ if ms is None: ms = cls.DEFAULT_TIMEOUT_WAIT if qt.BINDING in ('PySide', 'PySide2'): # PySide has no qWait, provide a replacement timeout = int(ms) endTimeMS = int(time.time() * 1000) + timeout qapp = qt.QApplication.instance() while timeout > 0: qapp.processEvents(qt.QEventLoop.AllEvents, maxtime=timeout) timeout = endTimeMS - int(time.time() * 1000) else: QTest.qWait(int(ms) + cls.TIMEOUT_WAIT) def qWaitForWindowExposed(self, window, timeout=None): """Waits until the window is shown in the screen. See QTest.qWaitForWindowExposed for details. """ result = qWaitForWindowExposedAndActivate(window, timeout) if self.TIMEOUT_WAIT: QTest.qWait(self.TIMEOUT_WAIT) return result _qobject_destroyed = False @classmethod def _aboutToDestroy(cls): cls._qobject_destroyed = True @classmethod def qWaitForDestroy(cls, ref): """ Wait for Qt object destruction. Use a weakref as parameter to avoid any strong references to the object. It have to be used as following. Removing the reference to the object before calling the function looks to be expected, else :meth:`deleteLater` will not work. .. code-block:: python ref = weakref.ref(self.obj) self.obj = None self.qWaitForDestroy(ref) :param weakref ref: A weakref to an object to avoid any reference :return: True if the object was destroyed :rtype: bool """ cls._qobject_destroyed = False if qt.BINDING == 'PyQt4': # Without this, QWidget will be still alive on PyQt4 # (at least on Windows Python 2.7) # If it is not skipped on PySide, silx.gui.dialog tests will # segfault (at least on Windows Python 2.7) import gc gc.collect() qobject = ref() if qobject is None: return True qobject.destroyed.connect(cls._aboutToDestroy) qobject.deleteLater() qobject = None for _ in range(10): if cls._qobject_destroyed: break cls.qWait(10) else: _logger.debug("Object was not destroyed") return ref() is None def logScreenShot(self, level=logging.ERROR): """Take a screenshot and log it into the logging system if the logger is enabled for the expected level. The screenshot is stored in the directory "./build/test-debug", and the logging system only log the path to this file. :param level: Logging level """ if not _logger.isEnabledFor(level): return basedir = os.path.abspath(os.path.join("build", "test-debug")) if not os.path.exists(basedir): os.makedirs(basedir) filename = "Screenshot_%s.png" % self.id() filename = os.path.join(basedir, filename) if not hasattr(self.qapp, "primaryScreen"): # Qt4 winId = qt.QApplication.desktop().winId() pixmap = qt.QPixmap.grabWindow(winId) else: # Qt5 screen = self.qapp.primaryScreen() pixmap = screen.grabWindow(0) pixmap.save(filename) _logger.log(level, "Screenshot saved at %s", filename) class SignalListener(object): """Util to listen a Qt event and store parameters """ def __init__(self): self.__calls = [] def __call__(self, *args, **kargs): self.__calls.append((args, kargs)) def clear(self): """Clear stored data""" self.__calls = [] def callCount(self): """ Returns how many times the listener was called. :rtype: int """ return len(self.__calls) def arguments(self, callIndex=None, argumentIndex=None): """Returns positional arguments optionally filtered by call count id or argument index. :param int callIndex: Index of the called data :param int argumentIndex: Index of the positional argument. """ if callIndex is not None: result = self.__calls[callIndex][0] if argumentIndex is not None: result = result[argumentIndex] else: result = [x[0] for x in self.__calls] if argumentIndex is not None: result = [x[argumentIndex] for x in result] return result def karguments(self, callIndex=None, argumentName=None): """Returns positional arguments optionally filtered by call count id or name of the keyword argument. :param int callIndex: Index of the called data :param int argumentName: Name of the keyword argument. """ if callIndex is not None: result = self.__calls[callIndex][1] if argumentName is not None: result = result[argumentName] else: result = [x[1] for x in self.__calls] if argumentName is not None: result = [x[argumentName] for x in result] return result def partial(self, *args, **kargs): """Returns a new partial object which when called will behave like this listener called with the positional arguments args and keyword arguments keywords. If more arguments are supplied to the call, they are appended to args. If additional keyword arguments are supplied, they extend and override keywords. """ return functools.partial(self, *args, **kargs) def getQToolButtonFromAction(action): """Return a QToolButton corresponding to a QAction. :param QAction action: The QAction from which to get QToolButton. :return: A QToolButton associated to action or None. """ for widget in action.associatedWidgets(): if isinstance(widget, qt.QToolButton): return widget return None def findChildren(parent, kind, name=None): if qt.BINDING in ("PySide", "PySide2") and name is not None: result = [] for obj in parent.findChildren(kind): if obj.objectName() == name: result.append(obj) return result else: return parent.findChildren(kind, name=name)