junit - How to mock a class and its inner static class using Powermock -

i have class :

public class someclass {         private string somefield;         public someclass(string field) {         somefield = field;     }      public string geturl() {             return "http://" + somefield;     }      public static class builder {           private string uri;             public builder(string url) {             this.uri = url;         }             public someclass build() {               return new someclass(uri);         }     } } 

the above class being called class as:

class mainclass {         private someclass someclass;         public boolean isurlavailable() {         someclass = new someclass.builder("myuri").build();         string url = someclass.geturl();         if (url != null && url.length() > 10) {             return true;         }         return false;     } } 

my requirement test mainclass, need mock someclass , someclass.builder class. tried mock 2 classes not achieve requirement.

the code showing should not require mock anything. uses builder build something. assuming have tested someclass/builder on own - verify method in main gives correct result.

anyway: mocking static class possible - see here. thing pay attention of: pre-conditions right, example have required annotations:

runwith(powermockrunner.class) @preparefortest(someclassbuilderclass.class) 

beyond that: don't mock static in first place. only problem call new!

and - real answer here: pass in instance of someclass work in (instead of calling new builder inside of method under test)!