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POhow should I test method that does not return anything?
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copied!<p>This is the code from my recent tool I have made, I am trying to write unittest, I have an <a href="https://github.com/sanfx/slideShow/blob/master/tests/test_utils.py" rel="nofollow">idea of how to test a method that returns something</a> but don't understand how should i test method that don't like below:</p> <pre><code>def buildUi(self): self.label = QtGui.QLabel() self.label.setAlignment(QtCore.Qt.AlignCenter) self.setCentralWidget(self.label) def nextImage(self): """ switch to next image or previous image """ if self._imagesInList: if self._count == len(self._imagesInList): self._count = 0 self.showImageByPath( self._imagesInList[self._count]) if self.animFlag: self._count += 1 else: self._count -= 1 def showImageByPath(self, path): if path: image = QtGui.QImage(path) pp = QtGui.QPixmap.fromImage(image) self.label.setPixmap(pp.scaled( self.label.size(), QtCore.Qt.KeepAspectRatio, QtCore.Qt.SmoothTransformation)) def playPause(self): if not self._pause: self._pause = True self.updateTimer.start(2500) return self._pause else: self._pause = False self.updateTimer.stop() def keyPressEvent(self, keyevent): """ Capture key to exit, next image, previous image, on Escape , Key Right and key left respectively. """ event = keyevent.key() if event == QtCore.Qt.Key_Escape: self.close() if event == QtCore.Qt.Key_Left: self.animFlag = False self.nextImage() if event == QtCore.Qt.Key_Right: self.animFlag = True self.nextImage() if event == 32: self._pause = self.playPause() </code></pre> <p>the complete code for looking can be found <a href="https://github.com/sanfx/slideShow/blob/master/python/slideShow.py" rel="nofollow">here</a></p> <p>is it possible to test these methods above or do I have to modify to make them testable ? Edit: updated:</p> <pre><code>class TestSlideShow(unittest.TestCase): """ docstring for TestSlideShow """ def setUp(self): self.mox = mox.Mox() self.imgLst = ['/folder/test/images/test1.jpg', '/folder/test/images/test2.JPG', '/folder/test/images/test3.png', '/folder/test/images/test4.PNG'] app = QtGui.QApplication([]) self.show = slideShow.SlideShowPics(imgLst=self.imgLst, ui=False) def tearDown(self): self.mox.UnsetStubs() self.mox.ResetAll() def test_nextImage(self): self.mox.StubOutWithMock(self.show, 'prepairWindow') self.show.prepairWindow() self.mox.StubOutWithMock(self.show, 'showImageByPath') self.show.showImageByPath(self.imgLst[1]) self.show.nextImage() # self.mox.ReplayAll() self.assertEquals(1, self.show.count) self.assertEquals(self.imgLst[1], self.show._imagesInList[1]) # self.mox.VerifyAll() def test_nextImage_animFlag_False(self): self.show.animFlag = False self.show.count = 4 self.mox.StubOutWithMock(self.show, 'prepairWindow') self.show.prepairWindow() self.mox.StubOutWithMock(self.show, 'showImageByPath') self.show.showImageByPath(self.imgLst[3]) print self.show.count self.show.nextImage() print self.show.count # self.assertEquals(3, self.show.count) self.assertEquals(self.imgLst[3], self.show._imagesInList[3]) if __name__ == '__main__': unittest.main() </code></pre> <p>the first test when self.show.animFlag is True works fine and but the when I manually set the animFlag= False then second test fails.</p>

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