在Java中使用通配符作为返回类型

Question

Mockito.doReturn(true).when(a)
                .isTest(Const.A,
                        Const.B);

In the above code cacheGet method returns a boolean value.(true/false) I want to use a wildcard for that instead true or false.

Mockito.doReturn(?).when(a)
                .isTest(Const.A,
                        Const.B);

I want to use the wildcard in place where '?' is.

How to do it in Java?

Answer 1

try this

String wildcard="";

if(true){

wildcard = //wildcard for true

}

else {

wildcard = //wildcard for false

}

Answer 2

Your code

Mockito.doReturn(true).when(cacheAdaptorCore)
                .cacheGet(OMSConst.DEFAULT_TENANCY_CODE,
                        OMSConst.APP_PARAM_DECIMAL_FORMATTER, 
CACHE_NAMES.SYS_PARAMS_CACHE_CORE);

tells Mockito, "Hey Mockito, if, during the following test, somehow the method cacheAdapterCore.cacheGet() is called with the parameters OMSConst ..., do not really call the method, but instead make the code believe that the method returns true ."

Now try the same sentence with "... make the code believe that the method returns ???"

See, it makes no sense.

If you want to do different tests and for some you want the method to return true, and for others you want it to return false, then you have to write separate test methods and within them, tell Mockito to return true resp. false.