Added basic tests for get_app_config[s].

tests/apps/models.py

@@ -1,6 +1,9 @@
+from __future__ import unicode_literals
+
 from django.apps.registry import Apps
 from django.db import models
 
+
 # We're testing app registry presence on load, so this is handy.
 
 new_apps = Apps()

tests/apps/tests.py

@@ -1,13 +1,33 @@
-from __future__ import absolute_import
+from __future__ import absolute_import, unicode_literals
 
 from django.apps import apps
 from django.apps.registry import Apps
+from django.conf import settings
 from django.db import models
-from django.test import TestCase
+from django.test import TestCase, override_settings
 
 from .models import TotallyNormal, SoAlternative, new_apps
 
 
+# Small list with a variety of cases for tests that iterate on installed apps.
+# Intentionally not in alphabetical order to check if the order is preserved.
+
+SOME_INSTALLED_APPS = [
+    'apps.apps.MyAdmin',
+    'apps.apps.MyAuth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+SOME_INSTALLED_APPS_NAMES = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+] + SOME_INSTALLED_APPS[2:]
+
+SOME_INSTALLED_APPS_WTH_MODELS_NAMES = SOME_INSTALLED_APPS_NAMES[:4]
+
 class AppsTests(TestCase):
 
     def test_singleton_master(self):
@@ -33,6 +53,51 @@ class AppsTests(TestCase):
         # ready regardless of whether populate_models() has run.
         self.assertTrue(apps.ready)
 
+    @override_settings(INSTALLED_APPS=SOME_INSTALLED_APPS)
+    def test_get_app_configs(self):
+        """
+        Tests get_app_configs().
+        """
+        app_configs = apps.get_app_configs()
+        self.assertListEqual(
+            [app_config.name for app_config in app_configs],
+            SOME_INSTALLED_APPS_NAMES)
+
+    @override_settings(INSTALLED_APPS=SOME_INSTALLED_APPS)
+    def test_get_app_configs_with_models(self):
+        """
+        Tests get_app_configs(only_with_models_module=True).
+        """
+        app_configs = apps.get_app_configs(only_with_models_module=True)
+        self.assertListEqual(
+            [app_config.name for app_config in app_configs],
+            SOME_INSTALLED_APPS_WTH_MODELS_NAMES)
+
+    @override_settings(INSTALLED_APPS=SOME_INSTALLED_APPS)
+    def test_get_app_config(self):
+        """
+        Tests get_app_config().
+        """
+        app_config = apps.get_app_config('admin')
+        self.assertEqual(app_config.name, 'django.contrib.admin')
+
+        app_config = apps.get_app_config('staticfiles')
+        self.assertEqual(app_config.name, 'django.contrib.staticfiles')
+
+        with self.assertRaises(LookupError):
+            apps.get_app_config('webdesign')
+
+    @override_settings(INSTALLED_APPS=SOME_INSTALLED_APPS)
+    def test_get_app_config_with_models(self):
+        """
+        Tests get_app_config(only_with_models_module=True).
+        """
+        app_config = apps.get_app_config('admin', only_with_models_module=True)
+        self.assertEqual(app_config.name, 'django.contrib.admin')
+
+        with self.assertRaises(LookupError):
+            apps.get_app_config('staticfiles', only_with_models_module=True)
+
     def test_models_py(self):
         """
         Tests that the models in the models.py file were loaded correctly.
@@ -55,10 +120,10 @@ class AppsTests(TestCase):
             'app_label': "apps",
             'apps': new_apps,
         }
-        meta = type("Meta", tuple(), meta_contents)
+        meta = type(str("Meta"), tuple(), meta_contents)
         body['Meta'] = meta
         body['__module__'] = TotallyNormal.__module__
-        temp_model = type("SouthPonies", (models.Model,), body)
+        temp_model = type(str("SouthPonies"), (models.Model,), body)
         # Make sure it appeared in the right place!
         self.assertEqual(
             old_models,