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package org.netbeans.html.ko4j;

import java.io.PrintWriter;

import java.io.StringWriter;

import net.java.html.json.ComputedProperty;

import net.java.html.json.Model;

import net.java.html.json.Property;

import org.netbeans.html.json.tck.KOTest;

/**

 *

 * @author Jaroslav Tulach

 */

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

    @Property(name = "value", type = int.class)

})

public class LessCallbacksCheck {

    private static StringWriter sw;

    @ComputedProperty static int plusOne(int value) {

        if (sw == null) {

            sw = new StringWriter();

        }

        new Exception("Who calls me?").printStackTrace(

            new PrintWriter(sw)

        );

        return value + 1;

    }

    @KOTest public void dontCallForInitialValueBackToJavaVM() {

        sw = null;

        LessCalls m = new LessCalls(10).applyBindings();

        assert m.getPlusOne() == 11 : "Expecting 11: " + m.getPlusOne();

        assert sw != null : "StringWriter should be initialized: " + sw;

        if (sw.toString().contains("$JsCallbacks$")) {

            assert false : "Don't call for initial value via JsCallbacks:\n" + sw;

        }

    }

    @KOTest public void dontCallForChangeValueBackToJavaVM() {

        LessCalls m = new LessCalls(10).applyBindings();

        assert m.getPlusOne() == 11 : "Expecting 11: " + m.getPlusOne();

        sw = null;

        m.setValue(5);

        assert m.getPlusOne() == 6: "Expecting 6: " + m.getPlusOne();

        assert sw != null : "StringWriter should be initialized: " + sw;

        if (sw.toString().contains("$JsCallbacks$")) {

            assert false : "Don't call for initial value via JsCallbacks:\n" + sw;

        }

    }

}