Disallow unsafe type assertions (#18688)

packages/core/src/utils/testUtils.ts

@@ -52,6 +52,26 @@ export function disableSimulationAfterFallback(): void {
   fallbackOccurred = true;
 }
 
+/**
+ * Create a simulated 429 error response
+ */
+export function createSimulated429Error(): Error {
+  // eslint-disable-next-line @typescript-eslint/no-unsafe-type-assertion
+  const error = new Error('Rate limit exceeded (simulated)') as Error & {
+    status: number;
+  };
+  error.status = 429;
+  return error;
+}
+
+/**
+ * Reset simulation state when switching auth methods
+ */
+export function resetSimulationState(): void {
+  fallbackOccurred = false;
+  resetRequestCounter();
+}
+
 /**
  * Enable/disable 429 simulation programmatically (for tests)
  */