double failureRate = totalRequests > 0 ? (double) totalFailures / totalRequests : 0.0;
            long averageResponseTime = totalRequests > 0 ? totalResponseTime / totalRequests : 0;

            if (minResponseTime == Long.MAX_VALUE) {
                minResponseTime = 0;
            }

            return new WindowMetrics(totalRequests, totalFailures, failureRate, averageResponseTime, minResponseTime, maxResponseTime);

        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,
                int consecutiveFailures, double successRate) {

        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")
    void testCircuitOpensAfterThreshold() {