one: new test for UserCloudDetails

one/tests.py

 from django.test import TestCase
+from django.contrib.auth.models import User
+from models import Disk, Instance, InstanceType, Network, Template, UserCloudDetails
 
 class ViewsTestCase(TestCase):
     def test_index(self):
         '''Test whether index is reachable.'''
         resp = self.client.get('/', follow=True)
         self.assertEqual(resp.status_code, 200)
+
+class UserCloudDetailsTestCase(TestCase):
+    def setUp(self):
+        user = User.objects.create(username="testuser",
+                password="testpass", email="test@mail.com",
+                first_name="Test", last_name="User")
+        disk1 = Disk.objects.create(name="testdsk1")
+        insttype = InstanceType.objects.create(name="testtype", CPU=4,
+                RAM=4096, credit=4)
+        ntwrk = Network.objects.create(name="testntwrk", nat=False,
+                public=True)
+        tmplt1 = Template.objects.create(name="testtmplt1", disk=disk1,
+                instance_type=insttype, network=ntwrk, owner=user)
+        tmplt2 = Template.objects.create(name="testtmplt2", disk=disk1,
+                instance_type=insttype, network=ntwrk, owner=user)
+        self.testinst1 = Instance.objects.create(owner=user, template=tmplt1,
+                state="ACTIVE")
+        self.testinst2 = Instance.objects.create(owner=user, template=tmplt2,
+                state="ACTIVE")
+        self.testdetails = UserCloudDetails.objects.get(user=user)
+
+    def test_get_weighted_instance_count(self):
+        credits = (self.testinst1.template.instance_type.credit +
+                self.testinst2.template.instance_type.credit)
+        self.assertEqual(credits, self.testdetails
+                .get_weighted_instance_count())
+        self.testinst1.state = "STOPPED"
+        self.testinst1.save()
+        self.assertEqual(self.testinst2.template.instance_type.credit,
+                self.testdetails.get_weighted_instance_count())
+        self.testinst2.state = "STOPPED"
+        self.testinst2.save()
+        self.assertEqual(0, self.testdetails.get_weighted_instance_count())