added test cases to verify __contains__ implementation

roomlist/housing/test_models.py

+# standard library imports
+from __future__ import absolute_import, print_function
+# core django imports
+from django.test import TestCase
+from django.contrib.auth.models import User
+# imports from your apps
+from accounts.models import Student
+from housing.models import Building, Floor, Room
+
+
+class BuildingTest(TestCase):
+
+    def setUp(self):
+        global wilson
+        global wilson_third
+        global wilson_313
+
+        wilson = Building.objects.create(name='Wilson', neighbourhood='sh', campus='ff')
+        wilson_third = Floor.objects.create(building=wilson, number=3)
+        wilson_313 = Room.objects.create(floor=wilson_third, number=313)
+
+        wilson.save()
+        wilson_third.save()
+        wilson_313.save()
+
+        gmason = User.objects.create_user(username='gmason',
+                                          first_name='George',
+                                          last_name='Mason',
+                                          email='gmason@masonlive.gmu.edu',
+                                          password='eagle_bank')
+
+        global george
+
+        george = Student.objects.create(user=gmason, room=wilson_313)
+
+        george.save()
+
+    def test_building_contains_room(self):
+        self.assertTrue(wilson_313 in wilson)
+
+    def test_building_contains_floor(self):
+        self.assertTrue(wilson_third in wilson)
+
+    def test_building_contains_student(self):
+        self.assertTrue(george in wilson)
+
+
+class FloorTest(TestCase):
+
+    def test_floor_contains_room(self):
+        self.assertTrue(wilson_313 in wilson_third)
+
+    def test_floor_contains_student(self):
+        self.assertTrue(george in wilson_third)
+
+
+class RoomTest(TestCase):
+
+    def test_room_contains_student(self):
+        self.assertTrue(george in wilson_313)