lister.tests: Add missing task_type for package listers

The scheduler module no longer initializes itself those task_type.

swh/lister/cran/lister.py

@@ -60,6 +60,7 @@ class CRANLister(SimpleLister):
         policy = kwargs.get('policy', 'oneshot')
         package = kwargs.get('name')
         version = kwargs.get('version')
+        assert origin_type == 'tar'
         return create_task_dict(
             'load-%s' % origin_type,
             policy, package, origin_url, version,

swh/lister/cran/tests/conftest.py

@@ -1 +1,23 @@
+# Copyright (C) 2019  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+import pytest
+
 from swh.lister.core.tests.conftest import *  # noqa
+
+
+@pytest.fixture
+def lister_cran(swh_listers):
+    lister = swh_listers['cran']
+
+    # Add the load-deb-package in the scheduler backend
+    lister.scheduler.create_task_type({
+        'type': 'load-tar',
+        'description': 'Load archive files',
+        'backend_name': 'swh.loader.package.tasks.LoadArchive',
+        'default_interval': '1 day',
+    })
+
+    return lister

swh/lister/cran/tests/test_lister.py

@@ -28,18 +28,16 @@ def test_cran_compute_package_url_failure():
 
 
 @patch('swh.lister.cran.lister.read_cran_data')
-def test_cran_lister_cran(mock_cran, datadir, swh_listers):
-    lister = swh_listers['cran']
-
+def test_cran_lister_cran(mock_cran, datadir, lister_cran):
     with open(path.join(datadir, 'list-r-packages.json')) as f:
         data = json.loads(f.read())
 
     mock_cran.return_value = data
     assert len(data) == 6
 
-    lister.run()
+    lister_cran.run()
 
-    r = lister.scheduler.search_tasks(task_type='load-tar')
+    r = lister_cran.scheduler.search_tasks(task_type='load-tar')
     assert len(r) == 6
 
     for row in r: