From 935be27118a6469eba89047b1e6c4bd989373e8d Mon Sep 17 00:00:00 2001
From: Renzo Lucioni <renzo@renzolucioni.com>
Date: Tue, 19 Jul 2016 16:39:07 -0400
Subject: [PATCH] Allow program detail pages to function when catalog config is
 missing

---
 .../djangoapps/catalog/tests/test_utils.py    | 18 +++++++++---
 openedx/core/djangoapps/catalog/utils.py      | 29 ++++++++++---------
 2 files changed, 30 insertions(+), 17 deletions(-)

diff --git a/openedx/core/djangoapps/catalog/tests/test_utils.py b/openedx/core/djangoapps/catalog/tests/test_utils.py
index 690c238427..641488d0d4 100644
--- a/openedx/core/djangoapps/catalog/tests/test_utils.py
+++ b/openedx/core/djangoapps/catalog/tests/test_utils.py
@@ -5,6 +5,7 @@ import mock
 from opaque_keys.edx.keys import CourseKey
 
 from openedx.core.djangoapps.catalog import utils
+from openedx.core.djangoapps.catalog.models import CatalogIntegration
 from openedx.core.djangoapps.catalog.tests import factories, mixins
 from student.tests.factories import UserFactory
 
@@ -13,6 +14,8 @@ UTILS_MODULE = 'openedx.core.djangoapps.catalog.utils'
 
 
 @mock.patch(UTILS_MODULE + '.get_edx_api_data')
+# ConfigurationModels use the cache. Make every cache get a miss.
+@mock.patch('config_models.models.cache.get', return_value=None)
 class TestGetCourseRun(mixins.CatalogIntegrationMixin, TestCase):
     """Tests covering retrieval of course runs from the catalog service."""
     def setUp(self):
@@ -34,7 +37,7 @@ class TestGetCourseRun(mixins.CatalogIntegrationMixin, TestCase):
 
         return args, kwargs
 
-    def test_get_course_run(self, mock_get_catalog_data):
+    def test_get_course_run(self, _mock_cache, mock_get_catalog_data):
         course_run = factories.CourseRun()
         mock_get_catalog_data.return_value = course_run
 
@@ -43,7 +46,7 @@ class TestGetCourseRun(mixins.CatalogIntegrationMixin, TestCase):
         self.assert_contract(mock_get_catalog_data.call_args)
         self.assertEqual(data, course_run)
 
-    def test_course_run_unavailable(self, mock_get_catalog_data):
+    def test_course_run_unavailable(self, _mock_cache, mock_get_catalog_data):
         mock_get_catalog_data.return_value = []
 
         data = utils.get_course_run(self.course_key, self.user)
@@ -51,14 +54,14 @@ class TestGetCourseRun(mixins.CatalogIntegrationMixin, TestCase):
         self.assert_contract(mock_get_catalog_data.call_args)
         self.assertEqual(data, {})
 
-    def test_cache_disabled(self, mock_get_catalog_data):
+    def test_cache_disabled(self, _mock_cache, mock_get_catalog_data):
         utils.get_course_run(self.course_key, self.user)
 
         _, kwargs = self.assert_contract(mock_get_catalog_data.call_args)
 
         self.assertIsNone(kwargs['cache_key'])
 
-    def test_cache_enabled(self, mock_get_catalog_data):
+    def test_cache_enabled(self, _mock_cache, mock_get_catalog_data):
         catalog_integration = self.create_catalog_integration(cache_ttl=1)
 
         utils.get_course_run(self.course_key, self.user)
@@ -67,6 +70,13 @@ class TestGetCourseRun(mixins.CatalogIntegrationMixin, TestCase):
 
         self.assertEqual(kwargs['cache_key'], catalog_integration.CACHE_KEY)
 
+    def test_config_missing(self, _mock_cache, _mock_get_catalog_data):
+        """Verify that no errors occur if this method is called when catalog config is missing."""
+        CatalogIntegration.objects.all().delete()
+
+        data = utils.get_course_run(self.course_key, self.user)
+        self.assertEqual(data, {})
+
 
 @mock.patch(UTILS_MODULE + '.get_course_run')
 @mock.patch(UTILS_MODULE + '.strip_querystring')
diff --git a/openedx/core/djangoapps/catalog/utils.py b/openedx/core/djangoapps/catalog/utils.py
index 1c762f3fae..e9f9560f20 100644
--- a/openedx/core/djangoapps/catalog/utils.py
+++ b/openedx/core/djangoapps/catalog/utils.py
@@ -21,21 +21,24 @@ def get_course_run(course_key, user):
     """
     catalog_integration = CatalogIntegration.current()
 
-    scopes = ['email', 'profile']
-    expires_in = settings.OAUTH_ID_TOKEN_EXPIRATION
-    jwt = JwtBuilder(user).build_token(scopes, expires_in)
-    api = EdxRestApiClient(catalog_integration.internal_api_url, jwt=jwt)
+    if catalog_integration.enabled:
+        scopes = ['email', 'profile']
+        expires_in = settings.OAUTH_ID_TOKEN_EXPIRATION
+        jwt = JwtBuilder(user).build_token(scopes, expires_in)
+        api = EdxRestApiClient(catalog_integration.internal_api_url, jwt=jwt)
 
-    data = get_edx_api_data(
-        catalog_integration,
-        user,
-        'course_runs',
-        resource_id=unicode(course_key),
-        cache_key=catalog_integration.CACHE_KEY if catalog_integration.is_cache_enabled else None,
-        api=api,
-    )
+        data = get_edx_api_data(
+            catalog_integration,
+            user,
+            'course_runs',
+            resource_id=unicode(course_key),
+            cache_key=catalog_integration.CACHE_KEY if catalog_integration.is_cache_enabled else None,
+            api=api,
+        )
 
-    return data if data else {}
+        return data if data else {}
+    else:
+        return {}
 
 
 def get_run_marketing_url(course_key, user):