'Check widget when data is removed'

def test_remove_data(self):

    self.send_signal(self.widget.Inputs.data, self.iris)
    self.assertEqual(self.widget.cb_prob.count(), 5)
    self.assertEqual(self.widget.groupvarview.count(), 2)
    self.send_signal(self.widget.Inputs.data, None)
    self.assertEqual(self.widget.cb_prob.count(), 0)
    self.assertEqual(self.widget.groupvarview.count(), 0)
