Inheritance: extends BaseInterceptor, implements Go\Aop\AdviceAround
 public function testInvocationIsCalledWithinAdvice()
 {
     $sequence = array();
     $advice = function (Invocation $invocation) use(&$sequence) {
         $sequence[] = 'advice';
         $result = $invocation->proceed();
         $sequence[] = 'advice';
         return $result;
     };
     $invocation = $this->getInvocation($sequence);
     $interceptor = new AroundInterceptor($advice);
     $result = $interceptor->invoke($invocation);
     $this->assertEquals('invocation', $result, "Advice should return an original return value");
     $this->assertEquals(array('advice', 'invocation', 'advice'), $sequence, "Around logic should work");
 }