test(ariadne): cover cluster state fetcher failures

ariadne/services/cluster_state_fetchers.py

@@ -10,6 +10,9 @@ from .cluster_state_pods import *
 from .cluster_state_workloads import *
 
 
+PodFetchResult = tuple[list[dict[str, Any]], list[dict[str, Any]], list[dict[str, Any]], list[dict[str, Any]], dict[str, Any]]
+
+
 def _get_json(path: str) -> dict[str, Any]:
     facade = sys.modules.get("ariadne.services.cluster_state")
     getter = getattr(facade, "get_json", _default_get_json) if facade is not None else _default_get_json
@@ -40,9 +43,7 @@ def _fetch_flux(errors: list[str]) -> dict[str, Any]:
     return {}
 
 
-def _fetch_pods(
+def _fetch_pods(errors: list[str]) -> PodFetchResult:
-    errors: list[str],
-) -> tuple[list[dict[str, Any]], list[dict[str, Any]], list[dict[str, Any]], list[dict[str, Any]], dict[str, Any]]:
     workloads: list[dict[str, Any]] = []
     namespace_pods: list[dict[str, Any]] = []
     namespace_nodes: list[dict[str, Any]] = []

tests/unit/services/test_cluster_state_fetcher_edges.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+from ariadne.services import cluster_state_fetchers as fetchers
+
+
+def test_cluster_state_fetchers_record_individual_api_errors(monkeypatch) -> None:
+    def fail_json(path: str):
+        raise RuntimeError(f"boom {path}")
+
+    monkeypatch.setattr(fetchers, "_get_json", fail_json)
+    errors: list[str] = []
+
+    assert fetchers._fetch_nodes(errors) == ({}, [], {})
+    assert fetchers._fetch_flux(errors) == {}
+    assert fetchers._fetch_pods(errors) == ([], [], [], [], {})
+    assert fetchers._fetch_jobs(errors) == {}
+    assert fetchers._fetch_longhorn(errors) == {}
+    assert fetchers._fetch_workload_health(errors) == {}
+    assert fetchers._fetch_events(errors) == {}
+    assert [entry.split(":", 1)[0] for entry in errors] == [
+        "nodes",
+        "flux",
+        "pods",
+        "jobs",
+        "longhorn",
+        "workloads_health",
+        "events",
+    ]
+