| /******************************************************************************* |
| * Copyright (c) 2006 Brad Reynolds and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Brad Reynolds - initial API and implementation |
| * Brad Reynolds - bug 171616 |
| * Katarzyna Marszalek - test case for bug 198519 |
| ******************************************************************************/ |
| |
| package org.eclipse.core.tests.internal.databinding.internal.beans; |
| |
| import java.beans.PropertyDescriptor; |
| |
| import org.eclipse.core.databinding.beans.BeansObservables; |
| import org.eclipse.core.databinding.observable.ChangeEvent; |
| import org.eclipse.core.databinding.observable.IChangeListener; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.value.ComputedValue; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.core.internal.databinding.internal.beans.JavaBeanObservableValue; |
| import org.eclipse.jface.examples.databinding.model.SimplePerson; |
| import org.eclipse.jface.tests.databinding.AbstractDefaultRealmTestCase; |
| import org.eclipse.jface.tests.databinding.EventTrackers.ValueChangeEventTracker; |
| |
| /** |
| * @since 3.2 |
| */ |
| public class JavaBeanObservableValueTest extends AbstractDefaultRealmTestCase { |
| private Bean bean; |
| private JavaBeanObservableValue observableValue; |
| private PropertyDescriptor propertyDescriptor; |
| private String propertyName; |
| |
| /* (non-Javadoc) |
| * @see junit.framework.TestCase#setUp() |
| */ |
| protected void setUp() throws Exception { |
| super.setUp(); |
| |
| bean = new Bean(); |
| propertyName = "value"; |
| propertyDescriptor = new PropertyDescriptor(propertyName, Bean.class); |
| observableValue = new JavaBeanObservableValue(Realm.getDefault(), bean, propertyDescriptor, String.class); |
| } |
| |
| public void testSetsValueInBean() throws Exception { |
| String value = "value"; |
| assertNull(observableValue.getValue()); |
| observableValue.setValue(value); |
| assertEquals("value", value, observableValue.getValue()); |
| } |
| |
| public void testGetObserved() throws Exception { |
| assertEquals(bean, observableValue.getObserved()); |
| } |
| |
| public void testGetPropertyDescriptor() throws Exception { |
| assertEquals(propertyDescriptor, observableValue.getPropertyDescriptor()); |
| } |
| |
| public void testRegistersListenerAfterFirstListenerIsAdded() throws Exception { |
| assertFalse(bean.changeSupport.hasListeners(propertyName)); |
| observableValue.addValueChangeListener(new ValueChangeEventTracker()); |
| assertTrue(bean.changeSupport.hasListeners(propertyName)); |
| } |
| |
| public void testRemovesListenerAfterLastListenerIsRemoved() throws Exception { |
| ValueChangeEventTracker listener = new ValueChangeEventTracker(); |
| observableValue.addValueChangeListener(listener); |
| |
| assertTrue(bean.changeSupport.hasListeners(propertyName)); |
| observableValue.removeValueChangeListener(listener); |
| assertFalse(bean.changeSupport.hasListeners(propertyName)); |
| } |
| |
| public void testFiresValueChangeEvents() throws Exception { |
| ValueChangeEventTracker listener = new ValueChangeEventTracker(); |
| observableValue.addValueChangeListener(listener); |
| |
| assertEquals(0, listener.count); |
| bean.setValue(bean.getValue() + bean.getValue()); |
| assertEquals(1, listener.count); |
| } |
| |
| public void testSetValueThrowsExceptionThrownByBean() throws Exception { |
| ThrowsSetException temp = new ThrowsSetException(); |
| JavaBeanObservableValue observable = new JavaBeanObservableValue(Realm |
| .getDefault(), temp, |
| new PropertyDescriptor("value", ThrowsSetException.class), ThrowsSetException.class); |
| |
| try { |
| observable.setValue(""); |
| fail("exception should have been thrown"); |
| } catch (RuntimeException e) { |
| assertEquals(temp.thrownException, e.getCause()); |
| } |
| } |
| |
| public void testGetValueThrowsExceptionThrownByBean() throws Exception { |
| ThrowsGetException temp = new ThrowsGetException(); |
| JavaBeanObservableValue observable = new JavaBeanObservableValue(Realm |
| .getDefault(), temp, |
| new PropertyDescriptor("value", ThrowsGetException.class), ThrowsGetException.class); |
| |
| try { |
| observable.getValue(); |
| fail("exception should have been thrown"); |
| } catch (RuntimeException e) { |
| assertEquals(temp.thrownException, e.getCause()); |
| } |
| } |
| |
| public void testBug198519() { |
| final SimplePerson person = new SimplePerson(); |
| final ComputedValue cv = new ComputedValue() { |
| final IObservableValue name = BeansObservables.observeValue(person, "name"); //$NON-NLS-1$ |
| protected Object calculate() { |
| return Boolean.valueOf(name.getValue() != null); |
| } |
| }; |
| cv.addChangeListener(new IChangeListener() { |
| public void handleChange(ChangeEvent event) { |
| cv.getValue(); |
| } |
| }); |
| person.setName("foo"); |
| } |
| |
| /** |
| * Throws an exception when the value is set. |
| * |
| * @since 3.2 |
| */ |
| /* package */ class ThrowsSetException { |
| private String value; |
| /* package */ NullPointerException thrownException; |
| |
| public void setValue(String value) { |
| throw thrownException = new NullPointerException(); |
| } |
| |
| public String getValue() { |
| return value; |
| } |
| } |
| |
| /* package */ class ThrowsGetException { |
| public String value; |
| /* package */ NullPointerException thrownException; |
| |
| public String getValue() { |
| throw thrownException = new NullPointerException(); |
| } |
| |
| public void setValue(String value) { |
| this.value = value; |
| } |
| |
| } |
| } |