fix(alarms): Severity runs one direction, higher = more urgent; raw priority kept (#129)

AlarmConditionState.Severity mixed two conventions: OPC UA rows carried Part 9 Severity (higher = more severe) while MxGateway native alarms and computed alarms carried a raw AVEVA-style priority (1 = most urgent). Every consumer ranks higher as worse, so Worst Severity, the severity filter/sort and the site event-log Error threshold picked the LEAST urgent MxGateway/computed alarms. - AlarmPriorityBands: the OtOpcUa GalaxyAlarmPriority table (lmxopcua#887, b61f3e05), value for value: 1-250 -> 1000, 251-500 -> 750, 501-750 -> 500, 751-999 -> 250; <= 0 clamps to Critical, > 999 to Low. - MxGatewayAlarmMapper bands the gateway severity (= AVEVA priority); AlarmConditionStateFactory.ForComputed bands PriorityLevel. OPC UA unchanged. - AlarmConditionState gains trailing Priority (int?): the raw source number, exactly the pre-#129 Severity. AlarmStateChanged.Priority and the wire AlarmStateUpdate.priority keep that meaning (no proto change); central derives Severity by kind (SeverityFromPriority), so an older site decodes correctly. - ScriptAlarm gains trailing Priority. The native MES 900-999 band and the MES API Severity/MinSeverity/MaxSeverity key off Priority; rig seed scripts moved from a.Severity to a.Priority, so MES output is unchanged. - AlarmActor raise logs Error when the banded severity >= 700 (same threshold as NativeAlarmActor): priority 1-500 Error, 501+ Warning (was raw >= 700). - NativeAlarmActor upgrades pre-#129 native_alarm_state rows on rehydrate. - Debug snapshot decode restores Condition.Priority from the row's priority. - Docs: Commons, DCL, SiteRuntime, Communication, CentralUI, InboundAPI, HighLevelReqs, MES alarm-status plan, CLAUDE.md. Claude-Session: https://claude.ai/code/session_01GT67ACmpMR7b9LGRPLijMi
2026-11-12 13:58:28 -05:00
parent e36cd6055e
commit dd4f1c2aa3
39 changed files with 686 additions and 120 deletions
@@ -0,0 +1,90 @@
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Alarms;
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
+
+namespace ZB.MOM.WW.ScadaBridge.Commons.Tests.Types.Alarms;
+
+/// <summary>
+/// Pins the AVEVA priority → unified Severity table (Gitea #129). It must equal OtOpcUa's
+/// <c>GalaxyAlarmPriority.Map</c> (lmxopcua#887, <c>b61f3e05</c>) value for value — the edge rows below
+/// are copied from OtOpcUa's <c>MxAccessSeverityMapperTests</c> — so a Galaxy alarm reads the same
+/// Severity through the MxGateway adapter as through OtOpcUa.
+/// </summary>
+public sealed class AlarmPriorityBandsTests
+{
+    /// <summary>The band table at every edge, plus the out-of-range clamps.</summary>
+    [Theory]
+    [InlineData(1, 1000)]      // AVEVA Critical 1–250
+    [InlineData(250, 1000)]
+    [InlineData(251, 750)]     // AVEVA High 251–500
+    [InlineData(500, 750)]
+    [InlineData(501, 500)]     // AVEVA Medium 501–750
+    [InlineData(750, 500)]
+    [InlineData(751, 250)]     // AVEVA Low 751–999
+    [InlineData(999, 250)]
+    [InlineData(0, 1000)]      // below range: clamped to priority 1
+    [InlineData(-100, 1000)]
+    [InlineData(int.MinValue, 1000)]
+    [InlineData(1000, 250)]    // above range: clamped to priority 999
+    [InlineData(int.MaxValue, 250)]
+    public void ToSeverity_assigns_the_AVEVA_priority_band(int priority, int expectedSeverity) =>
+        Assert.Equal(expectedSeverity, AlarmPriorityBands.ToSeverity(priority));
+
+    /// <summary>
+    /// A more urgent (lower) priority never yields a lower Severity, and the ends differ — so neither the
+    /// pre-#129 identity mapping (which rises with priority) nor a constant mapping passes.
+    /// </summary>
+    [Fact]
+    public void ToSeverity_never_ranks_a_less_urgent_priority_above_a_more_urgent_one()
+    {
+        var previous = AlarmPriorityBands.ToSeverity(1);
+        for (var priority = 2; priority <= 999; priority++)
+        {
+            var current = AlarmPriorityBands.ToSeverity(priority);
+            Assert.True(current <= previous, $"priority {priority} must not be more severe than {priority - 1}");
+            previous = current;
+        }
+
+        Assert.True(AlarmPriorityBands.ToSeverity(1) > AlarmPriorityBands.ToSeverity(999));
+    }
+
+    /// <summary>The constants are the OtOpcUa values, so a drift on either side is caught here.</summary>
+    [Fact]
+    public void Constants_match_OtOpcUa_GalaxyAlarmPriority()
+    {
+        Assert.Equal(250, AlarmPriorityBands.CriticalMaxPriority);
+        Assert.Equal(500, AlarmPriorityBands.HighMaxPriority);
+        Assert.Equal(750, AlarmPriorityBands.MediumMaxPriority);
+        Assert.Equal(1000, AlarmPriorityBands.SeverityCritical);
+        Assert.Equal(750, AlarmPriorityBands.SeverityHigh);
+        Assert.Equal(500, AlarmPriorityBands.SeverityMedium);
+        Assert.Equal(250, AlarmPriorityBands.SeverityLow);
+    }
+
+    /// <summary>Computed alarms band their PriorityLevel onto Severity and keep it verbatim on Priority.</summary>
+    [Theory]
+    [InlineData(1, 1000)]
+    [InlineData(300, 750)]
+    [InlineData(700, 500)]
+    [InlineData(900, 250)]
+    public void ForComputed_bands_Severity_and_keeps_the_raw_Priority(int priority, int expectedSeverity)
+    {
+        var c = AlarmConditionStateFactory.ForComputed(AlarmState.Active, priority);
+        Assert.Equal(expectedSeverity, c.Severity);
+        Assert.Equal(priority, c.Priority);
+    }
+
+    /// <summary>
+    /// Central derives Severity from the wire's raw priority: banded for MxAccess and computed rows,
+    /// verbatim (clamped) for OPC UA, whose wire value is already Part 9 Severity.
+    /// </summary>
+    [Theory]
+    [InlineData(AlarmKind.NativeMxAccess, 1, 1000)]
+    [InlineData(AlarmKind.NativeMxAccess, 950, 250)]
+    [InlineData(AlarmKind.Computed, 400, 750)]
+    [InlineData(AlarmKind.Computed, 600, 500)]
+    [InlineData(AlarmKind.NativeOpcUa, 950, 950)]
+    [InlineData(AlarmKind.NativeOpcUa, 1, 1)]
+    [InlineData(AlarmKind.NativeOpcUa, 1500, 1000)]
+    public void SeverityFromPriority_bands_all_but_OPC_UA(AlarmKind kind, int priority, int expectedSeverity) =>
+        Assert.Equal(expectedSeverity, AlarmConditionStateFactory.SeverityFromPriority(kind, priority));
+}