Fix program credential backpopulation command

This command was updated to request programs from the catalog, but it wasn't changed to deal with the new response structure. I'm updating all code in the LMS to deal with catalog service responses separately.

ECOM-6900.

openedx/core/djangoapps/programs/tests/test_backpopulate_program_credentials.py

@@ -21,7 +21,7 @@ COMMAND_MODULE = 'openedx.core.djangoapps.programs.management.commands.backpopul
 
 
 @ddt.ddt
-@httpretty.activate
+@mock.patch(COMMAND_MODULE + '.get_programs')
 @mock.patch(COMMAND_MODULE + '.award_program_certificates.delay')
 @skip_unless_lms
 class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsApiConfigMixin, TestCase):
@@ -42,17 +42,8 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
         self.catalog_integration = self.create_catalog_integration()
         self.service_user = UserFactory(username=self.catalog_integration.service_username)
 
-    def _mock_programs_api(self, data):
-        """Helper for mocking out Catalog API URLs."""
-        self.assertTrue(httpretty.is_enabled(), msg='httpretty must be enabled to mock Catalog API calls.')
-
-        url = self.catalog_integration.internal_api_url.strip('/') + '/programs/'
-        body = json.dumps({'results': data})
-
-        httpretty.register_uri(httpretty.GET, url, body=body, content_type='application/json')
-
     @ddt.data(True, False)
-    def test_handle(self, commit, mock_task):
+    def test_handle(self, commit, mock_task, mock_get_programs):
         """Verify that relevant tasks are only enqueued when the commit option is passed."""
         data = [
             factories.Program(
@@ -64,7 +55,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
                 ]
             ),
         ]
-        self._mock_programs_api(data)
+        mock_get_programs.return_value = data
 
         GeneratedCertificateFactory(
             user=self.alice,
@@ -131,9 +122,9 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
             ),
         ],
     )
-    def test_handle_flatten(self, data, mock_task):
+    def test_handle_flatten(self, data, mock_task, mock_get_programs):
         """Verify that program structures are flattened correctly."""
-        self._mock_programs_api(data)
+        mock_get_programs.return_value = data
 
         GeneratedCertificateFactory(
             user=self.alice,
@@ -157,7 +148,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
         ]
         mock_task.assert_has_calls(calls, any_order=True)
 
-    def test_handle_username_dedup(self, mock_task):
+    def test_handle_username_dedup(self, mock_task, mock_get_programs):
         """Verify that only one task is enqueued for a user with multiple eligible certs."""
         data = [
             factories.Program(
@@ -170,7 +161,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
                 ]
             ),
         ]
-        self._mock_programs_api(data)
+        mock_get_programs.return_value = data
 
         GeneratedCertificateFactory(
             user=self.alice,
@@ -190,7 +181,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
 
         mock_task.assert_called_once_with(self.alice.username)
 
-    def test_handle_mode_slugs(self, mock_task):
+    def test_handle_mode_slugs(self, mock_task, mock_get_programs):
         """Verify that mode slugs are taken into account."""
         data = [
             factories.Program(
@@ -205,7 +196,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
                 ]
             ),
         ]
-        self._mock_programs_api(data)
+        mock_get_programs.return_value = data
 
         GeneratedCertificateFactory(
             user=self.alice,
@@ -224,7 +215,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
 
         mock_task.assert_called_once_with(self.alice.username)
 
-    def test_handle_passing_status(self, mock_task):
+    def test_handle_passing_status(self, mock_task, mock_get_programs):
         """Verify that only certificates with a passing status are selected."""
         data = [
             factories.Program(
@@ -237,7 +228,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
                 ]
             ),
         ]
-        self._mock_programs_api(data)
+        mock_get_programs.return_value = data
 
         passing_status = CertificateStatuses.downloadable
         failing_status = CertificateStatuses.notpassing
@@ -265,9 +256,8 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
 
         mock_task.assert_called_once_with(self.alice.username)
 
-    def test_handle_missing_service_user(self, mock_task):
+    def test_handle_missing_service_user(self, mock_task, __):
         """Verify that the command fails when no service user exists."""
-
         self.catalog_integration = self.create_catalog_integration(service_username='test')
         with self.assertRaises(CommandError):
             call_command('backpopulate_program_credentials')
@@ -275,7 +265,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
         mock_task.assert_not_called()
 
     @mock.patch(COMMAND_MODULE + '.logger.exception')
-    def test_handle_enqueue_failure(self, mock_log, mock_task):
+    def test_handle_enqueue_failure(self, mock_log, mock_task, mock_get_programs):
         """Verify that failure to enqueue a task doesn't halt execution."""
         def side_effect(username):
             """Simulate failure to enqueue a task."""
@@ -294,7 +284,7 @@ class BackpopulateProgramCredentialsTests(CatalogIntegrationMixin, CredentialsAp
                 ]
             ),
         ]
-        self._mock_programs_api(data)
+        mock_get_programs.return_value = data
 
         GeneratedCertificateFactory(
             user=self.alice,