java - How to partially mock a dependency abstract object in JMockit -

i have abstract class d dependency of tested class t.

the test class:

public class t_test {     @tested t tested;      d dependency;      public void test() {         dependency.dosomething();         tested.testedmethod(dependency);     } } 

i want dependency.dosomething() run real code of method, abstract methods mocked.

1. if run test is, nullpointerexception using uninitialized dependency.

2. if add @mocked annotation d dependency line, methods in d mocked, d.dosomething() doesn't it's supposed do.

3. if keep @mocked annotation , add empty nonstrictexpectations block @ beginning of test method, in order have partial mock, either this:

   new nonstrictexpectations(d.class) {}; 

   or this:

   new nonstrictexpectations(d) {}; 

   i java.lang.illegalargumentexception: mocked: class d.

4. if keep nonstrictexpectations block , remove @mocked annotation, again nullpointerexception using uninitialized dependency.

so how can partially mock dependency abstract class?

using @capturing annotation on dependency achieves this. no need add empty expectations block; abstract methods mocked.

public class t_test {     @tested t tested;      @capturing d dependency;      public void test() {         dependency.dosomething();         tested.testedmethod(dependency);     } }