circuitBreaker.tripBreaker();

        String result = circuitBreaker.call(() -> "primary", () -> "fallback");

        assertEquals("fallback", result);
    }

    @Test
    @DisplayName("Test transition to HALF_OPEN after timeout")
    void testTransitionToHalfOpen() throws Exception {
        // Open the circuit
        circuitBreaker.tripBreaker();

        stateChangeTime.set(System.currentTimeMillis());
        log.info("Circuit breaker {} reset", name);
    }

    /**
     * Force the circuit to open
     */
    public void tripBreaker() {
        State previous = state.getAndSet(State.OPEN);
        if (previous != State.OPEN) {
            stateChangeTime.set(System.currentTimeMillis());
            lastFailureTime.set(System.currentTimeMillis());