Fixes Broken UT

Author: IvanBM18

src/clusterfuzz/_internal/swarming/api.py

@@ -37,7 +37,8 @@ class SwarmingAPI:
 
   def __init__(self):
     self._config = get_swarming_config()
-    self._base_url = f"https://{self._config.get('swarming_server')}/prpc/"
+    if self._config:
+      self._base_url = f"https://{self._config.get('swarming_server')}/prpc/"
 
   def _get_headers(self) -> dict[str, str]:
     """Checks config and returns headers for pRPC request.

src/clusterfuzz/_internal/tests/core/swarming/service_test.py

@@ -27,7 +27,7 @@ class SwarmingServiceTest(unittest.TestCase):
   def setUp(self):
     helpers.patch(self, [
         'clusterfuzz._internal.swarming.is_swarming_task',
-        'clusterfuzz._internal.swarming.service._get_api',
+        'clusterfuzz._internal.swarming.service.SwarmingService._get_api',
         'clusterfuzz._internal.swarming.create_new_task_request',
         'clusterfuzz._internal.base.tasks.task_utils.get_command_from_module',
         'clusterfuzz._internal.metrics.logs.error',