### Question:
GraphLookUpQuery implements Queries.LookupQuery { @Override public ValueSpecifier<Projection> entityBy(Name name) { return new GraphValueChange(name); } GraphLookUpQuery(final GraphVisitor repository); @Override Queries.Projection entities(Entity.ID... entityIDs); @Override Queries.Projection entity(Entity.ID entityID); @Override ValueSpecifier<Projection> entityBy(Name name);  }### Answer:
@Test public void testFetchGraphValueChange(){ GraphVisitor repository = new MockGraphVisitor(); GraphLookUpQuery graphLookupQuery = new GraphLookUpQuery(repository); ValueSpecifier<Projection> projection = graphLookupQuery.entityBy(TartanImplTestConstants.ATTR_PARENT_ID); assertNotNull(projection); }