def METHOD_NAME(self):
    """
    Test that reader settings may be changed.
    """
    self._window.onReaderOptionsChanged(dict(timestep=1))
    self._window.onWindowRequiresUpdate()
    tdata = self._window._reader.getTimeData()
    self.assertEqual(1, tdata.timestep)
    self.assertEqual(0.1, tdata.time)
    self.assertImage('testReader.png')