[FIXED] capture parameters passes to stub in powermockito

Issue

How can I capture (for assertion purposes) the parmeters passed to a static stub method call?

The methodBeingStubbed looks like this...

public class SomeStaticClass{
protected static String methodBeingStubbed(Properties props){
...

I am stubbing the method call because it i need to verify that it gets called...

PowerMockito.stub(PowerMockito.method(SomeStaticClass.class, "methodBeingStubbed")).toReturn(null);
PowerMockito.verifyStatic();

But I now also want to know what properties were passed to this "methodBeingStubbed" and assert it is as expected

Solution

After the call to verifyStatic, you'll need to actually call the method you're trying to verify, as in the documentation here:

PowerMockito.verifyStatic(Static.class);
Static.thirdStaticMethod(Mockito.anyInt());

At that point you can use Mockito argument captors, as demonstrated (but not tested):

ArgumentCaptor<Properties> propertiesCaptor =
    ArgumentCaptor.forClass(Properties.class);

PowerMockito.verifyStatic(SomeStaticClass.class);
SomeStaticClass.methodBeingStubbed(propertiesCaptor.capture());

Properties passedInValue = propertiesCaptor.getValue();

If you're used to @Mock annotations, or you need to capture a generic (as in List<String>), you may also be interested in using the @Captor annotation instead.

Answered By - Jeff Bowman