Premiere commit - Omika

tests/Omika.Tests/Observability/Outbox/CompositeTelemetryExporterTests.cs

@@ -0,0 +1,46 @@
+using Omika.Core.Observability;
+using Omika.Core.Observability.Outbox;
+
+namespace Omika.Tests.Observability.Outbox;
+
+/// <summary>Tests du fan-out : l'échec d'un exporteur n'empêche jamais les autres (§16).</summary>
+public class CompositeTelemetryExporterTests
+{
+    private sealed class RecordingExporter : ITelemetryExporter
+    {
+        public int Calls { get; private set; }
+
+        public bool Throw { get; set; }
+
+        public Task ExportAsync(IReadOnlyList<OmikaEvent> events, CancellationToken cancellationToken = default)
+        {
+            Calls++;
+            if (Throw)
+            {
+                throw new InvalidOperationException("exporter down");
+            }
+
+            return Task.CompletedTask;
+        }
+    }
+
+    [Fact]
+    public async Task OneExporterFails_OtherStillRuns()
+    {
+        var broken = new RecordingExporter { Throw = true };
+        var healthy = new RecordingExporter();
+        var composite = new CompositeTelemetryExporter([broken, healthy]);
+
+        await composite.ExportAsync([OutboxTestHarness.NewEvent()], CancellationToken.None);
+
+        Assert.Equal(1, broken.Calls);
+        Assert.Equal(1, healthy.Calls);
+    }
+
+    [Fact]
+    public async Task EmptyExporterList_NoOp()
+    {
+        var composite = new CompositeTelemetryExporter([]);
+        await composite.ExportAsync([OutboxTestHarness.NewEvent()], CancellationToken.None);
+    }
+}