evaulate method of Statement executes before and test methods together

Question

I was trying to understand evaluate() method of Statement class say for example as per the code present in Apply '@Rule' after each '@Test' and before each '@After' in JUnit

The evaluate method actually executes both before and after and then moves ahead.

                @Override
            public void evaluate() throws Throwable {
                // TODO Auto-generated method stub
                try{
                System.out.println("I am Rule1");
                arg0.evaluate();
                System.out.println("I am Rule2");

                }

The part of the result of the above code is :

I am Rule1
I am before
I am Test1
I am Rule2

So, after "I am Rule1", how does "I am before" and "I am Test1" get displayed when at evaluate method?

The complete code is present in another question given above : http://stackoverflow.com/questions/12078982/rule-applies-to-before-after-in-junit — Mercenary, Dec 13 '12 at 16:06

score 0 · Answer 1 · answered Dec 13 '12 at 13:39

0

From the javadoc of the @Rule annotation:

The Statement passed to the TestRule will run any Before methods, then the Test method, and finally any After methods

I.e., when you call the evalute() method on the Statement, the above happens. The code you surround the evaluate() call with is called before and after, respectively, the Statement-related stuff.

answered Dec 13 '12 at 13:39

K Erlandsson

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Thanks. So, does @Rule run only for test methods? – Mercenary Dec 14 '12 at 13:30
Yes, it only runs for test methods. – K Erlandsson Dec 15 '12 at 22:57

evaulate method of Statement executes before and test methods together

1 Answers1