test: tighten control ui buffer assertions

shakkernerd · shakkernerd · commit df22284f8550 · 2026-05-08T18:16:04.000+01:00
diff --git a/ui/src/ui/control-ui-performance.test.ts b/ui/src/ui/control-ui-performance.test.ts
@@ -70,8 +70,13 @@ describe("recordControlUiPerformanceEvent", () => {
     }
 
     expect(host.eventLogBuffer).toHaveLength(250);
-    expect(host.eventLogBuffer[0]?.payload).toEqual({ i: 259 });
-    expect(host.eventLogBuffer.at(-1)?.payload).toEqual({ i: 10 });
+    const [newestEvent] = host.eventLogBuffer;
+    const oldestEvent = host.eventLogBuffer.at(-1);
+    if (!newestEvent || !oldestEvent) {
+      throw new Error("Expected bounded performance event buffer entries");
+    }
+    expect(newestEvent.payload).toEqual({ i: 259 });
+    expect(oldestEvent.payload).toEqual({ i: 10 });
   });
 });
 
