### Question:
CircuitBreakerAspect { public CircuitBreakerFactory getCircuitBreakerFactory() { return circuitBreakerFactory; } CircuitBreakerAspect(); void setCircuitBreakerFactory(
            CircuitBreakerFactory circuitBreakerFactory); CircuitBreakerFactory getCircuitBreakerFactory(); @Around("@annotation(circuitBreakerAnnotation)") Object monitor(final ProceedingJoinPoint pjp,
              CircuitBreaker circuitBreakerAnnotation);  }### Answer:
@Test public void testGetCircuitBreakerFactory() throws Throwable { ProceedingJoinPoint mockPjp = createPjpMock(mockSignature, 1); expect(mockPjp.proceed()).andReturn(null); replay(mockPjp); aspect.monitor(mockPjp, mockAnnotation); CircuitBreakerFactory circuitBreakerFactory = aspect.getCircuitBreakerFactory(); assertNotNull(circuitBreakerFactory); verifyBreakerExists(TEST_CIRCUIT_BREAKER); verify(mockPjp); verify(mockAnnotation); verify(mockSignature); }