package impl;

 import api.classes.Compute;

 import api.classes.Support;

 import java.util.Collections;

 import java.util.List;

 import java.util.Map;

 public class Impl {

     public static void main(String[] args) {

         class ProviderWrittenAgainstVersion1 extends Compute {

             @Override

             public List<String> getData() {

                 return Collections.singletonList("Hello");

             }

         }

         int index1 = Support.searchByDescription("Hello", new ProviderWrittenAgainstVersion1());

         assert index1 == 0;

         int index2 = Support.searchByDescription("Unknown", new ProviderWrittenAgainstVersion1());

         assert index2 == -1;

         class ProviderWrittenAgainstVersion2 extends Compute {

             @Override

             public List<String> getData() {

                 return Collections.singletonList("Hello");

             }

             @Override

             public Map<String, String> getDataAndDescription() {

                 return Collections.singletonMap("Hello", "Says hello");

             }

         }

         int index3 = Support.searchByDescription("Says hello", new ProviderWrittenAgainstVersion2());

         assert index3 == 0;

     }

 }