public final long totalCalls;
        public final long totalSuccesses;
        public final long totalFailures;
        public final long rejectedCalls;
        public final int consecutiveFailures;
        public final double successRate;

        public Statistics(String name, State state, long totalCalls, long totalSuccesses, long totalFailures, long rejectedCalls,

            assertNotNull(metrics, "Metrics should be available");
            assertEquals(3, metrics.totalRequests(), "Should have 3 requests");
            assertEquals(3, metrics.totalSuccesses(), "Should have 3 successes");
            assertEquals(0, metrics.totalFailures(), "Should have 0 failures");

        } finally {
            cbWithMetrics.close();
        }
    }

    @Test

        SimpleCircuitBreaker.Statistics stats = circuitBreaker.getStatistics();
        assertEquals(1, stats.totalCalls);
        assertEquals(1, stats.totalSuccesses);
        assertEquals(0, stats.totalFailures);
        assertEquals(1.0, stats.successRate);
    }

    @Test
    @DisplayName("Test circuit opens after failure threshold")

    // Metrics tracking
    private final AtomicLong totalRequests = new AtomicLong(0);
    private final AtomicLong totalFailures = new AtomicLong(0);
    private final AtomicLong totalSuccesses = new AtomicLong(0);
    private final AtomicLong totalCircuitOpenRejections = new AtomicLong(0);
    private final AtomicLong totalTimeInOpen = new AtomicLong(0);