raise notimplementederror for source with no API

backend/metagenedb/common/utils/external_api/test_togows.py

@@ -9,8 +9,9 @@ from metagenedb.common.utils.external_api.togows import GetFunctionExternalInfo
 class TestGetFunctionExternalInfo(TestCase):
 
     def test_get_details_unknown_source(self):
-        external_info_retriever = GetFunctionExternalInfo("test_id", "unknown")
-        self.assertDictEqual(external_info_retriever.get_details(), {})
+        with self.assertRaises(NotImplementedError):
+            external_info_retriever = GetFunctionExternalInfo("test_id", "unknown")
+            external_info_retriever.get_details()
 
     def test_get_details_kegg(self):
         with mock.patch('metagenedb.common.utils.external_api.togows.TogoWSEntryAPI') as MockTogoWSEntryAPI:

backend/metagenedb/common/utils/external_api/togows.py

@@ -16,7 +16,7 @@ class GetFunctionExternalInfo:
 
     def _get_unknown_source(self):
         logger.warning("No source of information for %s from %s" % (self.function_id, self.source))
-        return {}
+        raise NotImplementedError
 
     def _get_kegg(self):
         """