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 package org.netbeans.html.json.impl;

 import java.util.List;

 import java.util.Map;

 import net.java.html.BrwsrCtx;

 import net.java.html.json.ComputedProperty;

 import net.java.html.json.Model;

 import net.java.html.json.Models;

 import net.java.html.json.Property;

 import org.apidesign.html.context.spi.Contexts;

 import org.apidesign.html.json.spi.Technology;

 import org.apidesign.html.json.spi.Transfer;

 import org.netbeans.html.json.impl.DeepChangeTest.MapTechnology;

 import org.netbeans.html.json.impl.DeepChangeTest.One;

 import static org.testng.Assert.*;

 import org.testng.annotations.BeforeMethod;

 import org.testng.annotations.Test;

 /**

  *

  * @author Jaroslav Tulach

  */

 @Model(className = "TodoUI", properties = {

     @Property(name = "todos", type = Todo.class, array = true),

     @Property(name = "todoText", type = String.class)

 })

 public class ToDoTest {

     @Model(className = "Todo", properties = {

         @Property(name = "text", type = String.class),

         @Property(name = "done", type = boolean.class)

     })

     static class ItemCtrl {

     }

     @ComputedProperty

     static int remaining(

         List<Todo> todos, String todoText

     ) {

         int count = 0;

         for (Todo d : todos) {

             if (!d.isDone()) {

                 count++;

             }

         }

         return count;

     }

     private MapTechnology t;

     private BrwsrCtx c;

     @BeforeMethod

     public void initTechnology() {

         t = new MapTechnology();

         c = Contexts.newBuilder().register(Technology.class, t, 1).

                 register(Transfer.class, t, 1).build();

     }

     @Test public void checkAndUncheckFirstItem() throws Exception {

         TodoUI ui = Models.bind(

                 new TodoUI(

                     null,

                     new Todo("First", false),

                     new Todo("2nd", true),

                     new Todo("Third", false)

                 ), c).applyBindings();

         Map m = (Map) Models.toRaw(ui);

         Object v = m.get("remaining");

         assertNotNull(v, "Value should be in the map");

         assertEquals(v.getClass(), One.class, "It is instance of One");

         One o = (One) v;

         assertEquals(o.changes, 0, "No changes so far");

         assertTrue(o.pb.isReadOnly(), "Derived property");

         assertEquals(o.get(), 2);

         ui.getTodos().get(0).setDone(true);

         assertEquals(o.get(), 1);

         assertEquals(o.changes, 1, "One change so far");

         ui.getTodos().get(0).setDone(false);

         assertEquals(o.get(), 2);

         assertEquals(o.changes, 2, "2nd change so far");

     }

 }