text: from django.test.utils import override_settings
  from hc.api.models import Channel
  from hc.test import BaseTestCase
  
  TEST_CREDENTIALS = {
      "TWILIO_ACCOUNT": "foo",
      "TWILIO_AUTH": "foo",
      "TWILIO_FROM": "123",
      "TWILIO_USE_WHATSAPP": True,
  }
  
  
  @override_settings(**TEST_CREDENTIALS)
  class AddWhatsAppTestCase(BaseTestCase):
      def setUp(self):
          super(AddWhatsAppTestCase, self).setUp()
          self.url = "/projects/%s/add_whatsapp/" % self.project.code
  
      def test_instructions_work(self):
          self.client.login(username="alice@example.org", password="password")
          r = self.client.get(self.url)
          self.assertContains(r, "Get a WhatsApp message")
  
      @override_settings(USE_PAYMENTS=True)
      def test_it_warns_about_limits(self):
          self.profile.sms_limit = 0
          self.profile.save()
  
          self.client.login(username="alice@example.org", password="password")
          r = self.client.get(self.url)
          self.assertContains(r, "upgrade to a")
  
      def test_it_creates_channel(self):
          form = {
              "label": "My Phone",
              "value": "+1234567890",
              "down": "true",
              "up": "true",
          }
  
          self.client.login(username="alice@example.org", password="password")
          r = self.client.post(self.url, form)
          self.assertRedirects(r, self.channels_url)
  
          c = Channel.objects.get()
          self.assertEqual(c.kind, "whatsapp")
          self.assertEqual(c.phone_number, "+1234567890")
          self.assertEqual(c.name, "My Phone")
          self.assertTrue(c.whatsapp_notify_down)
          self.assertTrue(c.whatsapp_notify_up)
          self.assertEqual(c.project, self.project)
  
      def test_it_obeys_up_down_flags(self):
          form = {"label": "My Phone", "value": "+1234567890"}
  
          self.client.login(username="alice@example.org", password="password")
          r = self.client.post(self.url, form)
          self.assertRedirects(r, self.channels_url)
  
          c = Channel.objects.get()
          self.assertEqual(c.kind, "whatsapp")
          self.assertEqual(c.phone_number, "+1234567890")
          self.assertEqual(c.name, "My Phone")
          self.assertFalse(c.whatsapp_notify_down)
          self.assertFalse(c.whatsapp_notify_up)
          self.assertEqual(c.project, self.project)
  
      @override_settings(TWILIO_USE_WHATSAPP=False)
      def test_it_obeys_use_whatsapp_flag(self):
          self.client.login(username="alice@example.org", password="password")
          r = self.client.get(self.url)
          self.assertEqual(r.status_code, 404)
  