### Question:
MavenModelMerger extends ModelMerger { @Override protected void mergeModel_Prerequisites( Model target, Model source, boolean sourceDominant, Map<Object, Object> context ) { }   static final String CHILD_PATH_ADJUSTMENT; static final String ARTIFACT_ID; }### Answer:
@Test public void testMergeModel_Prerequisites() { Model parent = new Model(); parent.setPrerequisites( new Prerequisites() ); Model model = new Model(); modelMerger.mergeModel_Prerequisites( model, parent, false, null ); assertNull( model.getPrerequisites() ); Prerequisites modelPrerequisites = new Prerequisites(); modelPrerequisites.setMaven( "3.0" ); model.setPrerequisites( modelPrerequisites ); modelMerger.mergeModel_Prerequisites( model, parent, false, null ); assertEquals( modelPrerequisites, model.getPrerequisites() ); }