@Test
public void scanWithoutParentAndFilter() {

    Map<String, Class<?>> classes = defaultClassScanner.scan(Thread.currentThread().getContextClassLoader());
    
    verifyZeroInteractions(parent);
    verifyZeroInteractions(classNameFilter);
    verifyZeroInteractions(sourceDirFilter);
    
    assertTrue(classes.containsKey(Test.class.getName()));
}