merge(deferred-10): aggregated live alarm stream for Alarm Summary

Merges plan #10 (feat/live-alarm-stream) into main alongside plan #22. Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj
2026-07-10 13:01:04 -04:00
parent c9fa3b07f4 5078d25302
commit 8c888f13a0
36 changed files with 3327 additions and 53 deletions
@@ -167,4 +167,40 @@ public class AlarmSummaryServiceTests
        Assert.Equal(0, rollup.WorstSeverity);
        Assert.Equal(0, rollup.UnackedCount);
    }
+
+    // ── BuildFromLiveAlarms (plan #10, Task 5) ────────────────────────────────
+
+    [Fact]
+    public void BuildFromLiveAlarms_FlattensAndSorts_SameAsPollPath_WithEmptyNotReporting()
+    {
+        // Intentionally out-of-order input to prove the deterministic
+        // instance-then-alarm-name sort matches GetSiteAlarmsAsync.
+        var alarms = new List<AlarmStateChanged>
+        {
+            NativeAlarm("zeta", "Zulu", AlarmState.Active, 900, active: true, acked: false),
+            NativeAlarm("alpha", "Bravo", AlarmState.Active, 500, active: true, acked: true),
+            NativeAlarm("alpha", "Alpha", AlarmState.Active, 700, active: true, acked: false),
+        };
+
+        var result = CreateSut().BuildFromLiveAlarms(alarms);
+
+        // One row per alarm, instance taken from the alarm itself.
+        Assert.Equal(3, result.Alarms.Count);
+        Assert.Collection(result.Alarms,
+            r => Assert.Equal(("alpha", "Alpha"), (r.InstanceUniqueName, r.Alarm.AlarmName)),
+            r => Assert.Equal(("alpha", "Bravo"), (r.InstanceUniqueName, r.Alarm.AlarmName)),
+            r => Assert.Equal(("zeta", "Zulu"), (r.InstanceUniqueName, r.Alarm.AlarmName)));
+
+        // The live path can't compute "not reporting" — always empty.
+        Assert.Empty(result.NotReportingInstances);
+    }
+
+    [Fact]
+    public void BuildFromLiveAlarms_EmptySnapshot_YieldsNoRows()
+    {
+        var result = CreateSut().BuildFromLiveAlarms(Array.Empty<AlarmStateChanged>());
+
+        Assert.Empty(result.Alarms);
+        Assert.Empty(result.NotReportingInstances);
+    }
 }