### Question:
TalendInputEntity extends TalendEntity { public void addNextEntity(String entityId) { this.nextEntitiesId.add(entityId); EndPointProxy endpointProxy = new EndPointProxy(entityId, SourceType.SDK, EntityType.OPERATION_EXECUTION); this.targetProxies.add(endpointProxy); } TalendInputEntity(String jobId, String componentName); void addNextEntity(String entityId); void addPreviousEntity(String entityId); List<String> getPreviousEntitiesId(); List<String> getNextEntitiesId(); List<EndPointProxy> getTargetProxies(); List<EndPointProxy> getSourceProxies(); @Override String toString(); @Override void connectToEntity(List<String> inputs, List<String> outputs);  }### Answer:
@Test public void testAddNextEntity() { TalendInputEntity tie = new TalendInputEntity("job", "component1"); assertEquals(0, tie.getNextEntitiesId().size()); tie.addNextEntity("component4"); assertEquals(1, tie.getNextEntitiesId().size()); assertEquals("component4", tie.getNextEntitiesId().get(0)); assertEquals(1, tie.getTargetProxies().size()); tie.addNextEntity("component5"); assertEquals(2, tie.getNextEntitiesId().size()); assertEquals("component4", tie.getNextEntitiesId().get(0)); assertEquals("component5", tie.getNextEntitiesId().get(1)); assertEquals(2, tie.getTargetProxies().size()); assertEquals("component1 (" + GeneratorID.generateEntityID("job", "component1") + ") --->[component4, component5]", tie.toString()); }