test(ariadne): cover VM client edge parsing

ariadne/services/cluster_state_vm_client.py

@@ -200,10 +200,7 @@ def _vm_baseline_map(expr: str, label_key: str, window: str) -> dict[str, dict[s
     return baseline
 
 
-def _baseline_map_to_list(
-    baseline: dict[str, dict[str, float]],
-    name_key: str,
-) -> list[dict[str, Any]]:
+def _baseline_map_to_list(baseline: dict[str, dict[str, float]], name_key: str) -> list[dict[str, Any]]:
     output: list[dict[str, Any]] = []
     for name, stats in baseline.items():
         if not isinstance(name, str) or not name:
@@ -225,12 +222,7 @@ def _limit_entries(entries: list[dict[str, Any]], limit: int) -> list[dict[str,
     return entries[:limit]
 
 
-def _vm_window_series(
-    expr: str,
-    label_key: str,
-    name_key: str,
-    window: str,
-) -> dict[str, list[dict[str, Any]]]:
+def _vm_window_series(expr: str, label_key: str, name_key: str, window: str) -> dict[str, list[dict[str, Any]]]:
     avg = _vector_to_named(
         _vm_vector(f"avg_over_time(({expr})[{window}])"),
         label_key,
@@ -253,13 +245,7 @@ def _trim_window_series(series: dict[str, list[dict[str, Any]]], limit: int) ->
     return {key: _limit_entries(entries, limit) for key, entries in series.items()}
 
 
-def _build_metric_trends(
-    exprs: dict[str, str],
-    label_key: str,
-    name_key: str,
-    windows: tuple[str, ...],
-    limit: int,
-) -> dict[str, dict[str, dict[str, list[dict[str, Any]]]]]:
+def _build_metric_trends(exprs: dict[str, str], label_key: str, name_key: str, windows: tuple[str, ...], limit: int) -> dict[str, dict[str, dict[str, list[dict[str, Any]]]]]:
     trends: dict[str, dict[str, dict[str, list[dict[str, Any]]]]] = {}
     for metric, expr in exprs.items():
         metric_trends: dict[str, dict[str, list[dict[str, Any]]]] = {}

tests/unit/services/test_cluster_state_vm_domains.py

@@ -62,8 +62,28 @@ def test_vm_query_scalar_vector_and_alert_helpers(monkeypatch) -> None:
     assert vm_client._vm_vector("short") == []
 
 
+def test_vm_client_rejects_empty_and_malformed_values(monkeypatch) -> None:
+    monkeypatch.setattr(vm_client, "_vm_query", lambda _expr: [])
+    assert vm_client._vm_scalar("empty") is None
+
+    monkeypatch.setattr(vm_client, "_vm_query", lambda _expr: [{"metric": {}, "value": [1, "bad"]}])
+    assert vm_client._vm_scalar("bad") is None
+
+    monkeypatch.setattr(
+        vm_client,
+        "_vm_query",
+        lambda _expr: [
+            "bad",
+            {"metric": {"node": "titan-1"}, "value": [1, "not-a-number"]},
+            {"metric": {"node": "titan-2"}, "value": [1, "2"]},
+        ],
+    )
+    assert vm_client._vm_vector("mixed") == [{"metric": {"node": "titan-2"}, "value": 2.0}]
+
+
 def test_vm_client_alerts_and_namespace_filters(monkeypatch) -> None:
     entries = [
+        None,
         {"metric": {"alertname": "NodeDown", "severity": "critical"}, "value": 2},
         {"metric": {"alertname": "", "severity": "warning"}, "value": 1},
     ]
@@ -80,6 +100,7 @@ def test_vm_client_alerts_and_namespace_filters(monkeypatch) -> None:
             {"metric": {"namespace": "kube-system"}, "value": 1},
             {"metric": {"namespace": "apps"}, "value": 2},
             {"metric": {"namespace": ""}, "value": 3},
+            "bad",
         ]
     )
     assert filtered == [{"metric": {"namespace": "apps"}, "value": 2}]
@@ -92,6 +113,25 @@ def test_vm_client_alerts_and_namespace_filters(monkeypatch) -> None:
     assert vm_client._summarize_alerts(alerts)["by_severity"] == {"warning": 1, "critical": 1}
 
 
+def test_vm_client_alertmanager_success_and_errors(monkeypatch) -> None:
+    monkeypatch.setattr(vm_client, "settings", SimpleNamespace(alertmanager_url="", cluster_state_vm_timeout_sec=1.0))
+    errors: list[str] = []
+    assert vm_client._alertmanager_alerts(errors) == []
+    assert errors == []
+
+    _FakeClient.payload = [{"labels": {"alertname": "DiskHot"}}, "bad"]
+    monkeypatch.setattr(vm_client, "settings", SimpleNamespace(alertmanager_url="http://alertmanager", cluster_state_vm_timeout_sec=1.0))
+    monkeypatch.setattr(vm_client.httpx, "Client", _FakeClient)
+    assert vm_client._alertmanager_alerts(errors) == [{"labels": {"alertname": "DiskHot"}}]
+
+    _FakeClient.payload = RuntimeError("alertmanager down")
+    assert vm_client._alertmanager_alerts(errors) == []
+    assert errors[-1] == "alertmanager: alertmanager down"
+
+    _FakeClient.payload = {"unexpected": "shape"}
+    assert vm_client._alertmanager_alerts(errors) == []
+
+
 def test_vm_client_topk_baselines_and_window_series(monkeypatch) -> None:
     monkeypatch.setattr(
         vm_client,
@@ -111,8 +151,31 @@ def test_vm_client_topk_baselines_and_window_series(monkeypatch) -> None:
     baseline = vm_client._vm_baseline_map("expr", "node", "24h")
     assert baseline["titan-1"]["avg"] == 9.0
     assert vm_client._baseline_map_to_list(baseline, "node")[0]["node"] == "titan-1"
+    assert vm_client._baseline_map_to_list({"": {"avg": 10.0}, "titan-3": {"avg": 1.0}}, "node") == [
+        {"node": "titan-3", "avg": 1.0, "max": None}
+    ]
     assert vm_client._limit_entries([{"value": 1}, {"value": 2}], 1) == [{"value": 1}]
+    assert vm_client._limit_entries([{"value": 1}], 0) == []
 
+    monkeypatch.setattr(
+        vm_client,
+        "_vm_vector",
+        lambda _expr: [
+            {"metric": {}, "value": 1.0},
+            {"metric": {"node": ""}, "value": 2.0},
+            {"metric": {"node": "titan-1"}, "value": 3.0},
+        ],
+    )
+    assert vm_client._vm_baseline_map("expr", "node", "24h") == {"titan-1": {"avg": 3.0, "max": 3.0}}
+
+    monkeypatch.setattr(
+        vm_client,
+        "_vm_vector",
+        lambda _expr: [
+            {"metric": {"node": "titan-1", "namespace": "apps"}, "value": 9.0},
+            {"metric": {"node": "titan-2", "namespace": "apps"}, "value": 4.0},
+        ],
+    )
     series = vm_client._vm_window_series("expr", "node", "node", "1h")
     assert series["avg"][0]["node"] == "titan-1"
     trends = vm_client._build_metric_trends({"cpu": "expr"}, "node", "node", ("1h",), 2)