fix(r2-10): breaker-close marker + IsBreakerOpen on ResilienceStatusSnapshot

2026-07-13 10:35:41 -04:00
parent 46fedda3e4
commit 205d398055
3 changed files with 77 additions and 8 deletions
@@ -55,6 +55,41 @@ public sealed class DriverResilienceStatusTrackerTests
        tracker.TryGet("drv", "host")!.LastBreakerOpenUtc.ShouldBe(Now);
    }

+    /// <summary>Verifies that RecordBreakerClose stamps the close timestamp.</summary>
+    [Fact]
+    public void RecordBreakerClose_StampsCloseTime()
+    {
+        var tracker = new DriverResilienceStatusTracker();
+        tracker.RecordBreakerOpen("drv", "host", Now);
+
+        tracker.RecordBreakerClose("drv", "host", Now.AddSeconds(20));
+
+        tracker.TryGet("drv", "host")!.LastBreakerClosedUtc.ShouldBe(Now.AddSeconds(20));
+    }
+
+    /// <summary>Verifies that IsBreakerOpen tracks open → close → reopen transitions.</summary>
+    [Fact]
+    public void IsBreakerOpen_TracksOpenCloseReopen()
+    {
+        var tracker = new DriverResilienceStatusTracker();
+
+        // A snapshot with no breaker event is never "open".
+        tracker.RecordFailure("drv", "host", Now);
+        tracker.TryGet("drv", "host")!.IsBreakerOpen.ShouldBeFalse();
+
+        // Opened.
+        tracker.RecordBreakerOpen("drv", "host", Now.AddSeconds(1));
+        tracker.TryGet("drv", "host")!.IsBreakerOpen.ShouldBeTrue();
+
+        // Closed later → no longer open.
+        tracker.RecordBreakerClose("drv", "host", Now.AddSeconds(2));
+        tracker.TryGet("drv", "host")!.IsBreakerOpen.ShouldBeFalse();
+
+        // Re-opened after the last close → open again.
+        tracker.RecordBreakerOpen("drv", "host", Now.AddSeconds(3));
+        tracker.TryGet("drv", "host")!.IsBreakerOpen.ShouldBeTrue();
+    }
+
    /// <summary>Verifies that RecordRecycle populates the LastRecycleUtc timestamp.</summary>
    [Fact]
    public void RecordRecycle_Populates_LastRecycleUtc()