Added test case and updated changes file

Author: Ross Mechanic

CHANGES.rst

@@ -6,7 +6,8 @@ Unreleased
 - Use get_queryset rather than model.objects in history_view. (gh-303)
 - Change ugettext calls in models.py to ugettext_lazy
 - Resolve issue where model references itself (gh-278)
-- History models for inherited models will be located in the same module as the inherited model
+- Fix issue with tracking an inherited model (abstract class) (gh-269)
+- Resolve issue where model references itself (gh-278)
 
 1.9.0 (2017-06-11)
 ------------------

simple_history/tests/tests/test_models.py

@@ -15,15 +15,14 @@
 
 from ..external.models import ExternalModel2, ExternalModel4
 from ..models import (AbstractBase, AdminProfile, Book, Bookcase, Choice, City,
-                      ConcreteAttr, ConcreteUtil, Contact, ContactRegister,
+                      ConcreteAttr, ConcreteExternal, ConcreteUtil, Contact, ContactRegister,
                       Country, Document, Employee, ExternalModel1,
                       ExternalModel3, FileModel, HistoricalChoice,
                       HistoricalCustomFKError, HistoricalPoll, HistoricalState,
                       Library, MultiOneToOne, Person, Poll, PollInfo,
                       PollWithExcludeFields, Province, Restaurant, SelfFK,
                       Series, SeriesWork, State, Temperature,
                       UnicodeVerboseName, WaterLevel)
-from django.apps import apps
 
 get_model = apps.get_model
 User = get_user_model()
@@ -418,6 +417,13 @@ def test_get_model(self):
         self.assertEqual(get_model('tests', 'HistoricalExternalModel4'),
                          ExternalModel4.histories.model)
 
+        # Test that historical model is defined within app of concrete
+        # model rather than abstract base model
+        self.assertEqual(get_model('tests', 'ConcreteExternal'),
+                         ConcreteExternal)
+        self.assertEqual(get_model('tests', 'HistoricalConcreteExternal'),
+                         ConcreteExternal.history.model)
+
 
 class HistoryManagerTest(TestCase):
     def test_most_recent(self):