test(controller): add unit test for deleting domains

.get_object() returns all domains instead of the requested domain, which
causes an issue when attempting to delete or modify a specific domain.

Author: Matthew Fisher

controller/api/tests/test_domain.py

@@ -7,6 +7,7 @@
 from __future__ import unicode_literals
 
 import json
+import unittest
 
 from django.contrib.auth.models import User
 from django.test import TestCase
@@ -101,6 +102,12 @@ def test_delete_domain_does_not_remove_latest(self):
         with self.assertRaises(Domain.DoesNotExist):
             Domain.objects.get(domain=test_domains[0])
 
+    @unittest.skip(".get_object() returns all domains instead of the requested domain")
+    def test_delete_domain_does_not_remove_others(self):
+        """https://github.com/deis/deis/issues/3475"""
+        self.test_delete_domain_does_not_remove_latest()
+        self.assertEqual(Domain.objects.all().count(), 1)
+
     def test_manage_domain_invalid_app(self):
         url = '/v1/apps/{app_id}/domains'.format(app_id="this-app-does-not-exist")
         body = {'domain': 'test-domain.example.com'}