Fix a traceback with "check --only spot" when the "spot" check is unconfigured (#857).

NEWS

@@ -3,6 +3,7 @@
  * #851: Fix lack of file extraction when using "extract --strip-components all" on a path with a
    leading slash.
  * #854: Fix a traceback when the "data" consistency check is used.
+ # #857: Fix a traceback with "check --only spot" when the "spot" check is unconfigured.
 
 1.8.10
  * #656 (beta): Add a "spot" consistency check that compares file counts and contents between your

borgmatic/actions/check.py

@@ -480,7 +480,13 @@ def spot_check(
     '''
     log_label = f'{repository.get("label", repository["path"])}'
     logger.debug(f'{log_label}: Running spot check')
-    spot_check_config = next(check for check in config['checks'] if check['name'] == 'spot')
+
+    try:
+        spot_check_config = next(
+            check for check in config.get('checks', ()) if check.get('name') == 'spot'
+        )
+    except StopIteration:
+        raise ValueError('Cannot run spot check because it is unconfigured')
 
     if spot_check_config['data_tolerance_percentage'] > spot_check_config['data_sample_percentage']:
         raise ValueError(

tests/unit/actions/test_check.py

@@ -769,6 +769,36 @@ def test_compare_spot_check_hashes_considers_non_existent_path_as_not_matching()
     ) == ('/bar',)
 
 
+def test_spot_check_without_spot_configuration_errors():
+    with pytest.raises(ValueError):
+        module.spot_check(
+            repository={'path': 'repo'},
+            config={
+                'checks': [
+                    {
+                        'name': 'archives',
+                    },
+                ]
+            },
+            local_borg_version=flexmock(),
+            global_arguments=flexmock(),
+            local_path=flexmock(),
+            remote_path=flexmock(),
+        )
+
+
+def test_spot_check_without_any_configuration_errors():
+    with pytest.raises(ValueError):
+        module.spot_check(
+            repository={'path': 'repo'},
+            config={},
+            local_borg_version=flexmock(),
+            global_arguments=flexmock(),
+            local_path=flexmock(),
+            remote_path=flexmock(),
+        )
+
+
 def test_spot_check_data_tolerance_percenatge_greater_than_data_sample_percentage_errors():
     with pytest.raises(ValueError):
         module.spot_check(