Unit testing Spring @Around AOP methods

Question

I can unit test most of my Spring classes without needing to do Spring "stuff".

I can unit test @Before advice methods without using Spring too:

Example code:

@Before("execution(* run(..)) && " + "" +           "target(target) && " +         "args(name)") public void logName(Object target, String name) {     logger.info("{} - run: {}", target, name); } 

Example test:

@Test public void testLogName() {     aspect.setLogger(mockLogger);     aspect.logName(this,"Barry");     assertTrue(mockLogger.hasLogged("TestAspect - run: Barry")); } 

However @Around advice deals with a ProceedingJoinPoint object:

@Around("com.xyz.myapp.SystemArchitecture.businessService()") public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable {    // start stopwatch    Object retVal = pjp.proceed();    // stop stopwatch    return retVal;  } 

I don't know how to instantiate a ProceedingJoinPoint object. How do I test this class without starting a whole Spring application context?

Answer 1

You can test a Spring Aspect by creating a proxy programatically:

MyInterface target = new MyClass(); AspectJProxyFactory factory = new AspectJProxyFactory(target); MyAspect aspect = new MyAspect(arg); factory.addAspect(aspect); MyInterface proxy = factory.getProxy(); 

... then you can call methods on proxy, and make assertions about aspect, proxy and target.