BidirectionalBinding unit test

BidirectionalBindingTest.java

package com.sun.javafx.binding;

import javafx.beans.property.*;
import org.junit.Assert;
import org.junit.Test;


public class BidirectionalBindingTest {

    @Test
    public void testBind() throws Exception {
        DoubleProperty doubleProperty = new SimpleDoubleProperty(1.0);
        BooleanProperty booleanProperty = new SimpleBooleanProperty(false);
        BidirectionalBinding.bind(
                doubleProperty,
                booleanProperty,
                d -> (d.doubleValue() > 0.0),
                b -> b ? 1.0 : -1.0);
        Assert.assertEquals(-1.0, doubleProperty.getValue(), 0.1);
        doubleProperty.setValue(1.0);
        Assert.assertTrue(booleanProperty.get());
        doubleProperty.set(-1.0);
        Assert.assertFalse(booleanProperty.get());
        booleanProperty.setValue(true);
        Assert.assertEquals(1.0, doubleProperty.getValue(), 0.1);
        booleanProperty.setValue(false);
        Assert.assertEquals(-1.0, doubleProperty.getValue(), 0.1);
        BidirectionalBinding.unbind(doubleProperty, booleanProperty);
        booleanProperty.setValue(true);
        Assert.assertEquals(-1.0, doubleProperty.getValue(), 0.1);
        booleanProperty.setValue(false);
        doubleProperty.setValue(1.0);
        Assert.assertFalse(booleanProperty.get());
    }

    @Test
    public void testBindWithMethodReference() throws Exception {
        DoubleProperty doubleProperty = new SimpleDoubleProperty(1.0);
        StringProperty stringProperty = new SimpleStringProperty("0.0");
        BidirectionalBinding.bind(
                doubleProperty,
                stringProperty,
                d -> d.toString(),
                Double::valueOf);
        Assert.assertEquals(0.0, doubleProperty.get(), 0.1);
        stringProperty.setValue("1.23");
        Assert.assertEquals(1.23, doubleProperty.get(), 0.01);
    }

}