Publish curated Knowledge Hub source from 2ed833f290b439a7bc91e5fd19b042c269e3bee9

tests/backend/ItWorx.KnowledgeHub.IntegrationTests/Operations/PlatformMetricsTests.cs

@@ -0,0 +1,27 @@
+using System.Diagnostics.Metrics;
+using ItWorx.KnowledgeHub.Application.Operations;
+
+namespace ItWorx.KnowledgeHub.IntegrationTests.Operations;
+
+public sealed class PlatformMetricsTests
+{
+    [Fact]
+    public void Metrics_reject_unbounded_operation_and_outcome_dimensions()
+    {
+        var observed = new List<KeyValuePair<string, object?>>();
+        using var listener = new MeterListener();
+        listener.InstrumentPublished = (instrument, current) =>
+        {
+            if (instrument.Meter.Name == "ItWorx.KnowledgeHub.Platform") current.EnableMeasurementEvents(instrument);
+        };
+        listener.SetMeasurementEventCallback<double>((_, _, tags, _) => observed.AddRange(tags.ToArray()));
+        listener.SetMeasurementEventCallback<long>((_, _, tags, _) => observed.AddRange(tags.ToArray()));
+        listener.Start();
+        using var metrics = new PlatformMetrics();
+        metrics.Record("private query and bearer token", "secret", 0.1, 3);
+        Assert.NotEmpty(observed);
+        Assert.All(observed, tag => Assert.Contains(tag.Key, new[] { "operation", "outcome" }));
+        Assert.DoesNotContain(observed, tag => tag.Value?.ToString()?.Contains("secret", StringComparison.Ordinal) == true);
+        Assert.Contains(observed, tag => tag.Value?.ToString() == "other");
+    }
+}