'Check number of tabs with data on the input'

def test_input_data(self):

    self.send_signal(self.widget.Inputs.data, self.data, 1)
    self.assertEqual(self.widget.tabs.count(), 1)
    self.send_signal(self.widget.Inputs.data, self.data, 2)
    self.assertEqual(self.widget.tabs.count(), 2)
    self.send_signal(self.widget.Inputs.data, None, 1)
    self.assertEqual(self.widget.tabs.count(), 1)
