def test_transmittal_cannot_be_acked_twice(self):
    self.user.is_external = True
    self.trs.ack_receipt(self.user)
    self.assertIsNotNone(self.trs.ack_of_receipt_date)
    res = self.client.get(self.url)
    self.assertNotContains(res, ack_button)
def test_transmittal_cannot_be_acked_twice(self):
    self.user.is_external = True
    self.trs.ack_receipt(self.user)
    self.assertIsNotNone(self.trs.ack_of_receipt_date)
    res = self.client.get(self.url)
    self.assertNotContains(res, ack_button)