add validating tests around models with incorrect/missing data

binder/tests/models.py

@@ -1,11 +1,25 @@
 from django.test import TestCase
-
+from django.db import IntegrityError
 from binder import models
 
 class ModelTests(TestCase):
     def test_EmptyBindServerModel(self):
+        """Test that adding a well-formed BindServer works."""
         self.assertEqual(models.BindServer.objects.count(), 0)
         bindserver_1 = models.BindServer(hostname="test1",
                                         statistics_port=1234)
         bindserver_1.save()
         self.assertEqual(models.BindServer.objects.count(), 1)
+
+    def test_BindServerMissingStatisticsPort(self):
+        """Attempt to add a BindServer without a statistics port."""
+        bindserver_1 = models.BindServer(hostname="badtest1")
+        with self.assertRaisesMessage(IntegrityError, "binder_bindserver.statistics_port may not be NULL"):
+            bindserver_1.save()
+
+    def test_BindServerNonIntStatisticsPort(self):
+        """Attempt to add a Bindserver with a non-integer statistics port."""
+        bindserver_1 = models.BindServer(hostname="foo",
+                                         statistics_port="bar1")
+        with self.assertRaisesMessage(ValueError, "invalid literal for int() with base 10: 'bar1'"):
+            bindserver_1.save()