Using PowerMockito with ArgumentCaptor

Question

I simply try to test the following part of my service method:

if (isDeleted) {
    LoggingUtils.info("Deleted. ingredientUuuid: {}", ingredient.getUuid());
}

I try to use the following approach in order to catch the values passed to the static method:

// @RunWith(MockitoJUnitRunner.class)
@RunWith(PowerMockRunner.class)
public class DemoTest {

    @Test
    public void test() {

        // code omitted 

        Page<IngredientDTO> result = ingredientService.findAll(request,sort);

        PowerMockito.mockStatic(LoggingUtils.class);
        ArgumentCaptor<String> arg1 = ArgumentCaptor.forClass(String.class);
        ArgumentCaptor<UUID> arg2 = ArgumentCaptor.forClass(UUID.class);

        PowerMockito.verifyStatic(LoggingUtils.class, times(1));
        LoggingUtils.info(arg1.capture(), arg2.capture());


        // ...
    }
}

When debugging the test, it throws "The class com.company.common.LoggingUtils not prepared for test." pointing the following line:

PowerMockito.mockStatic(LoggingUtils.class);

So, how can I fix this problem?

Answer 1

Late answer, sorry for that, but maybe it still helps: Maybe you simply forgot the @PrepareForTest for your static class?

// @RunWith(MockitoJUnitRunner.class)
@RunWith(PowerMockRunner.class)
@PrepareForTest(LoggingUtils.class)  // <-- Required, otherwise you'll get exactly that "not prepared for test" error
public class DemoTest {
[...]