Implement dark theme (#49)

bookmarks/tests/test_user_profile_model.py

@@ -0,0 +1,12 @@
+from django.test import TestCase
+from django.contrib.auth.models import User
+
+from bookmarks.models import UserProfile
+
+
+class UserProfileTestCase(TestCase):
+
+    def test_create_user_should_init_profile(self):
+        user = User.objects.create_user('testuser', 'test@example.com', 'password123')
+        profile = UserProfile.objects.all().filter(user_id=user.id).first()
+        self.assertIsNotNone(profile)