Premiere commit - Omika

2026-10-23 18:46:50 +02:00
commit 8ea76c1b24
2155 changed files with 984301 additions and 0 deletions
@@ -0,0 +1,65 @@
+using Omika.Core.Observability.Outbox;
+
+namespace Omika.Tests.Observability.Outbox;
+
+/// <summary>Tests du backoff borné avec jitter (§43).</summary>
+public class DiagnosticBackoffPolicyTests
+{
+    [Fact]
+    public void NextDelay_IsBoundedByMax()
+    {
+        var options = new DiagnosticUploadOptions
+        {
+            BackoffInitial = TimeSpan.FromSeconds(15),
+            BackoffMax = TimeSpan.FromHours(1)
+        };
+        var policy = new DiagnosticBackoffPolicy(options);
+
+        // Garantie absolue : 0 < délai <= MaxDelay, pour tout attempt, y compris les
+        // valeurs extrêmes. Le jitter (aléatoire) ne peut JAMAIS faire dépasser MaxDelay
+        // car la borne finale est appliquée après le jitter.
+        int[] attempts = [0, 1, 5, 9, 20, 50, 100, int.MaxValue];
+        foreach (int attempt in attempts)
+        {
+            TimeSpan delay = policy.NextDelay(attempt);
+            Assert.True(delay > TimeSpan.Zero, $"attempt {attempt}: délai non strictement positif ({delay})");
+            Assert.True(delay <= options.BackoffMax, $"attempt {attempt}: délai {delay} dépasse le maximum {options.BackoffMax}");
+        }
+    }
+
+    [Fact]
+    public void NextDelay_GrowsWithAttempts()
+    {
+        var policy = new DiagnosticBackoffPolicy(new DiagnosticUploadOptions
+        {
+            BackoffInitial = TimeSpan.FromSeconds(15),
+            BackoffMax = TimeSpan.FromHours(1),
+            BackoffJitter = 0.0
+        });
+
+        TimeSpan first = policy.NextDelay(1);
+        TimeSpan second = policy.NextDelay(2);
+        TimeSpan third = policy.NextDelay(3);
+
+        Assert.True(second >= first);
+        Assert.True(third >= second);
+    }
+
+    [Fact]
+    public void NextDelay_WithJitter_StaysWithinJitterBounds()
+    {
+        var options = new DiagnosticUploadOptions
+        {
+            BackoffInitial = TimeSpan.FromSeconds(10),
+            BackoffMax = TimeSpan.FromMinutes(1),
+            BackoffJitter = 0.2
+        };
+        var policy = new DiagnosticBackoffPolicy(options);
+
+        for (int i = 0; i < 100; i++)
+        {
+            TimeSpan delay = policy.NextDelay(1);
+            Assert.InRange(delay.TotalMilliseconds, 8000, 12000);
+        }
+    }
+}