text: from django.test.utils import override_settings
  from hc.api.models import Channel
  from hc.test import BaseTestCase
  
  
  @override_settings(TWILIO_ACCOUNT="foo", TWILIO_AUTH="foo", TWILIO_FROM="123")
  class AddCallTestCase(BaseTestCase):
      def setUp(self):
          super(AddCallTestCase, self).setUp()
          self.url = "/projects/%s/add_call/" % 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 phone call")
  
      @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"}
  
          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, "call")
          self.assertEqual(c.phone_number, "+1234567890")
          self.assertEqual(c.name, "My Phone")
          self.assertEqual(c.project, self.project)
  
      def test_it_rejects_bad_number(self):
          form = {"value": "not a phone number"}
  
          self.client.login(username="alice@example.org", password="password")
          r = self.client.post(self.url, form)
          self.assertContains(r, "Invalid phone number format.")
  
      def test_it_trims_whitespace(self):
          form = {"value": "   +1234567890   "}
  
          self.client.login(username="alice@example.org", password="password")
          self.client.post(self.url, form)
  
          c = Channel.objects.get()
          self.assertEqual(c.phone_number, "+1234567890")
  
      @override_settings(TWILIO_AUTH=None)
      def test_it_requires_credentials(self):
          self.client.login(username="alice@example.org", password="password")
          r = self.client.get(self.url)
          self.assertEqual(r.status_code, 404)
  