package com.agfa.modules.gridpath.fx.properties;

import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import javafx.beans.binding.IntegerExpression;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;

import org.easymock.EasyMock;
import org.junit.Test;

public class TestDivideExpressionAreListenable {
    @SuppressWarnings({"rawtypes", "unchecked"})
    @Test
    public void testCanListenAnExpression() {
        SimpleIntegerProperty p = new SimpleIntegerProperty(10);
        IntegerExpression dividedBy2Expression1 = IntegerProperty.integerExpression(p.divide(2));
        IntegerExpression dividedBy2Expression2 = IntegerProperty.integerExpression(p.divide(2));
        
        ChangeListener l1 = EasyMock.createStrictMock(ChangeListener.class);
        l1.changed((ObservableValue)EasyMock.anyObject(), EasyMock.anyObject(), EasyMock.anyObject());
        EasyMock.expectLastCall().times(2);
        ChangeListener l2 = EasyMock.createStrictMock(ChangeListener.class);
        l2.changed((ObservableValue)EasyMock.anyObject(), EasyMock.anyObject(), EasyMock.anyObject());
        EasyMock.expectLastCall().times(2);
        EasyMock.replay(l1, l2);
        
        dividedBy2Expression1.addListener(l1);
        dividedBy2Expression2.addListener(l2);
        
        p.set(100);
        assertThat(dividedBy2Expression1.get(), is(50));
        assertThat(dividedBy2Expression2.get(), is(50));
        
        p.set(200);
        assertThat(dividedBy2Expression1.get(), is(100));
        assertThat(dividedBy2Expression2.get(), is(100));
        
        EasyMock.verify(l1, l2);
    }
}