final ActionFuture<String> mockFuture = mock(ActionFuture.class);

        // Fail 5 times, succeed on 6th attempt
        when(mockFuture.actionGet(anyLong(), any(TimeUnit.class))).thenAnswer(invocation -> {
            int count = attemptCount.incrementAndGet();
            if (count <= 5) {
                throw new RuntimeException("Simulated failure #" + count);
            }