Delegating the conditional to the has_configuration_Set method, which is overriden by the database backend, so the enable_pre_startup works well for both backends.

Adding tests

Fix quality issues

common/djangoapps/microsite_configuration/backends/base.py

@@ -290,9 +290,8 @@ class BaseMicrositeBackend(AbstractBaseMicrositeBackend):
         in non-mako templates must be loaded before the django startup
         """
         microsites_root = settings.MICROSITE_ROOT_DIR
-        microsite_config_dict = settings.MICROSITE_CONFIGURATION
 
-        if microsite_config_dict:
+        if self.has_configuration_set():
             settings.DEFAULT_TEMPLATE_ENGINE['DIRS'].append(microsites_root)
 
 

common/djangoapps/microsite_configuration/tests/backends/test_base.py

@@ -1,12 +1,20 @@
 """
 Test Microsite base backends.
 """
+import logging
+
+from mock import patch
+from django.conf import settings
 from django.test import TestCase
 
+from microsite_configuration import microsite
 from microsite_configuration.backends.base import (
     AbstractBaseMicrositeBackend,
+    BaseMicrositeBackend
 )
 
+log = logging.getLogger(__name__)
+
 
 class NullBackend(AbstractBaseMicrositeBackend):
     """
@@ -130,3 +138,36 @@ class AbstractBaseMicrositeBackendTests(TestCase):
 
         with self.assertRaises(NotImplementedError):
             backend.get_all_orgs()
+
+
+@patch(
+    'microsite_configuration.microsite.BACKEND',
+    microsite.get_backend(
+        'microsite_configuration.backends.base.BaseMicrositeBackend', BaseMicrositeBackend
+    )
+)
+class BaseMicrositeBackendTests(TestCase):
+    """
+    Go through and test the BaseMicrositeBackend class for behavior which is not
+    overriden in subclasses
+    """
+    def test_enable_microsites_pre_startup(self):
+        """
+        Tests microsite.test_enable_microsites_pre_startup works as expected.
+        """
+        # remove microsite root directory paths first
+        settings.DEFAULT_TEMPLATE_ENGINE['DIRS'] = [
+            path for path in settings.DEFAULT_TEMPLATE_ENGINE['DIRS']
+            if path != settings.MICROSITE_ROOT_DIR
+        ]
+
+        with patch('microsite_configuration.backends.base.BaseMicrositeBackend.has_configuration_set',
+                   return_value=False):
+            microsite.enable_microsites_pre_startup(log)
+            self.assertNotIn(settings.MICROSITE_ROOT_DIR,
+                             settings.DEFAULT_TEMPLATE_ENGINE['DIRS'])
+        with patch('microsite_configuration.backends.base.BaseMicrositeBackend.has_configuration_set',
+                   return_value=True):
+            microsite.enable_microsites_pre_startup(log)
+            self.assertIn(settings.MICROSITE_ROOT_DIR,
+                          settings.DEFAULT_TEMPLATE_ENGINE['DIRS'])

common/djangoapps/microsite_configuration/tests/backends/test_database.py

@@ -105,22 +105,6 @@ class DatabaseMicrositeBackendTests(DatabaseMicrositeTestCase):
         microsite.clear()
         self.assertIsNone(microsite.get_value('platform_name'))
 
-    def test_enable_microsites_pre_startup(self):
-        """
-        Tests microsite.test_enable_microsites_pre_startup works as expected.
-        """
-        # remove microsite root directory paths first
-        settings.DEFAULT_TEMPLATE_ENGINE['DIRS'] = [
-            path for path in settings.DEFAULT_TEMPLATE_ENGINE['DIRS']
-            if path != settings.MICROSITE_ROOT_DIR
-        ]
-        with patch.dict('django.conf.settings.FEATURES', {'USE_MICROSITES': False}):
-            microsite.enable_microsites_pre_startup(log)
-            self.assertNotIn(settings.MICROSITE_ROOT_DIR, settings.DEFAULT_TEMPLATE_ENGINE['DIRS'])
-        with patch.dict('django.conf.settings.FEATURES', {'USE_MICROSITES': True}):
-            microsite.enable_microsites_pre_startup(log)
-            self.assertIn(settings.MICROSITE_ROOT_DIR, settings.DEFAULT_TEMPLATE_ENGINE['DIRS'])
-
     @patch('edxmako.paths.add_lookup')
     def test_enable_microsites(self, add_lookup):
         """
@@ -173,6 +157,15 @@ class DatabaseMicrositeBackendTests(DatabaseMicrositeTestCase):
         with self.assertRaises(Exception):
             microsite.set_by_domain('test.microsite2.com')
 
+    def test_has_configuration_set(self):
+        """
+        Tests microsite.has_configuration_set works as expected on this backend.
+        """
+        self.assertTrue(microsite.BACKEND.has_configuration_set())
+
+        Microsite.objects.all().delete()
+        self.assertFalse(microsite.BACKEND.has_configuration_set())
+
 
 @patch(
     'microsite_configuration.microsite.TEMPLATES_BACKEND',

common/djangoapps/microsite_configuration/tests/backends/test_filebased.py

@@ -122,6 +122,15 @@ class FilebasedMicrositeBackendTests(TestCase):
         microsite.set_by_domain('unknown')
         self.assertEqual(microsite.get_value('university'), 'default_university')
 
+    def test_has_configuration_set(self):
+        """
+        Tests microsite.has_configuration_set works as expected.
+        """
+        self.assertTrue(microsite.BACKEND.has_configuration_set())
+
+        with patch('django.conf.settings.MICROSITE_CONFIGURATION', {}):
+            self.assertFalse(microsite.BACKEND.has_configuration_set())
+
 
 @patch(
     'microsite_configuration.microsite.TEMPLATES_BACKEND',

common/djangoapps/microsite_configuration/tests/test_microsites.py

@@ -2,6 +2,9 @@
 """
 Tests microsite_configuration templatetags and helper functions.
 """
+import logging
+
+from mock import patch
 from django.test import TestCase
 from django.conf import settings
 from microsite_configuration.templatetags import microsite as microsite_tags
@@ -9,6 +12,8 @@ from microsite_configuration import microsite
 from microsite_configuration.backends.base import BaseMicrositeBackend
 from microsite_configuration.backends.database import DatabaseMicrositeBackend
 
+log = logging.getLogger(__name__)
+
 
 class MicrositeTests(TestCase):
     """
@@ -74,3 +79,20 @@ class MicrositeTests(TestCase):
             ),
             DatabaseMicrositeBackend
         )
+
+    def test_enable_microsites_pre_startup(self):
+        """
+        Tests microsite.test_enable_microsites_pre_startup is not used if the feature is turned off.
+        """
+        # remove microsite root directory paths first
+        settings.DEFAULT_TEMPLATE_ENGINE['DIRS'] = [
+            path for path in settings.DEFAULT_TEMPLATE_ENGINE['DIRS']
+            if path != settings.MICROSITE_ROOT_DIR
+        ]
+
+        with patch.dict('django.conf.settings.FEATURES', {'USE_MICROSITES': False}):
+            microsite.enable_microsites_pre_startup(log)
+            self.assertNotIn(settings.MICROSITE_ROOT_DIR, settings.DEFAULT_TEMPLATE_ENGINE['DIRS'])
+        with patch.dict('django.conf.settings.FEATURES', {'USE_MICROSITES': True}):
+            microsite.enable_microsites_pre_startup(log)
+            self.assertIn(settings.MICROSITE_ROOT_DIR, settings.DEFAULT_TEMPLATE_ENGINE['DIRS'])