Do not include internal aliases in counter.

fix #1001

modoboa/admin/models/domain.py

@@ -76,7 +76,7 @@ class Domain(AdminObject):
 
     @property
     def mbalias_count(self):
-        return self.alias_set.count()
+        return self.alias_set.filter(internal=False).count()
 
     @property
     def identities_count(self):

modoboa/admin/tests/test_domain.py

@@ -144,6 +144,14 @@ class DomainTestCase(ModoTestCase):
         with self.assertRaises(Domain.DoesNotExist):
             Domain.objects.get(pk=1)
 
+    def test_domain_counters(self):
+        """Check counters at domain level."""
+        domain = Domain.objects.get(name="test.com")
+        self.assertEqual(domain.domainalias_count, 0)
+        self.assertEqual(domain.mailbox_count, 2)
+        self.assertEqual(domain.mbalias_count, 3)
+        self.assertEqual(domain.identities_count, 5)
+
     def test_domain_flat_list(self):
         """Test the 'domain_flat_list' view."""
         response = self.client.get(reverse("admin:domain_flat_list"))