Powermock Simulation Constructor _ function

Note that the first two lines of the 2 annotations @RunWith and @PrepareForTest
The @RunWith is simple, the back is always Powermockrunner.class
@PrepareForText need to add the class name of the calling constructor, not the class itself that has the constructor.


In the following example, the class we want to test is: helper, which invokes the constructor of the Somthing class in the helper class to create the instance.
@RunWith (Powermockrunner.class)
@PrepareForTest (Helper.class)
public class Helpertest {
@Mock
Private something mocksomething;

@InjectMocks
Private helper Helper;

@Test
public void DoSomething () throws Exception {
String argument = "arg";

Powermockito.whennew (Something.class). witharguments (argument). Thenreturn (mocksomething);

Call Required test method
helper.dosomething (argument);

For verification
Verify (mocksomething). DoIt ();
}
}




public class Helper {
public void dosomething (String arg) {
Something something = new Something (ARG);
Something.doit ();
}
}