| /******************************************************************************* |
| * Copyright (c) 2007, 2009 Matthew Hall 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: |
| * Matthew Hall - initial API and implementation (bug 207858) |
| * Matthew Hall - bug 263956 |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.tests.databinding.viewers; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.core.databinding.observable.IObservable; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory; |
| import org.eclipse.core.databinding.observable.set.IObservableSet; |
| import org.eclipse.core.databinding.observable.set.WritableSet; |
| import org.eclipse.core.runtime.AssertionFailedException; |
| import org.eclipse.jface.databinding.viewers.ObservableSetTreeContentProvider; |
| import org.eclipse.jface.internal.databinding.viewers.ObservableViewerElementSet; |
| import org.eclipse.jface.tests.databinding.AbstractDefaultRealmTestCase; |
| import org.eclipse.jface.viewers.IElementComparer; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Tree; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class ObservableSetTreeContentProviderTest extends AbstractDefaultRealmTestCase { |
| private Shell shell; |
| private TreeViewer viewer; |
| private Tree tree; |
| private ObservableSetTreeContentProvider contentProvider; |
| private Object input; |
| |
| @Before |
| public void setUp() throws Exception { |
| super.setUp(); |
| shell = new Shell(); |
| tree = new Tree(shell, SWT.NONE); |
| viewer = new TreeViewer(tree); |
| input = new Object(); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| shell.dispose(); |
| tree = null; |
| viewer = null; |
| input = null; |
| super.tearDown(); |
| } |
| |
| private void initContentProvider(IObservableFactory listFactory) { |
| contentProvider = new ObservableSetTreeContentProvider(listFactory, null); |
| viewer.setContentProvider(contentProvider); |
| viewer.setInput(input); |
| } |
| |
| @Test |
| public void testConstructor_NullArgumentThrowsException() { |
| try { |
| initContentProvider(null); |
| fail("Constructor should have thrown AssertionFailedException"); |
| } catch (AssertionFailedException expected) { |
| } |
| } |
| |
| @Test |
| public void testGetElements_ChangesFollowObservedList() { |
| final IObservableSet elements = new WritableSet(); |
| final Object input = new Object(); |
| initContentProvider(new IObservableFactory() { |
| @Override |
| public IObservable createObservable(Object target) { |
| return target == input ? elements : null; |
| } |
| }); |
| |
| assertTrue(Arrays.equals(new Object[0], contentProvider.getElements("unknown input"))); |
| |
| Object element0 = new Object(); |
| elements.add(element0); |
| |
| assertTrue(Arrays.equals(new Object[] { element0 }, contentProvider.getElements(input))); |
| |
| Object element1 = new Object(); |
| elements.add(element1); |
| |
| List<Object> elementList = Arrays.asList(contentProvider.getElements(input)); |
| assertEquals(2, elementList.size()); |
| assertTrue(elementList.containsAll(Arrays.asList(new Object[] { element0, element1 }))); |
| } |
| |
| @Test |
| public void testViewerUpdate_RemoveElementAfterMutation() { |
| IElementComparer comparer = new IElementComparer() { |
| @Override |
| public boolean equals(Object a, Object b) { |
| return a == b; |
| } |
| |
| @Override |
| public int hashCode(Object element) { |
| return System.identityHashCode(element); |
| } |
| }; |
| viewer.setComparer(comparer); |
| |
| final IObservableSet children = ObservableViewerElementSet.withComparer(Realm.getDefault(), null, comparer); |
| initContentProvider(new IObservableFactory() { |
| @Override |
| public IObservable createObservable(Object target) { |
| return target == input ? children : null; |
| } |
| }); |
| |
| Mutable element = new Mutable(); |
| children.add(element); |
| assertEquals(1, tree.getItemCount()); |
| |
| element.mutate(); |
| assertTrue(children.remove(element)); |
| assertEquals(0, tree.getItemCount()); |
| } |
| |
| @Test |
| public void testInputChanged_ClearsKnownElements() { |
| input = new Object(); |
| final Object input2 = new Object(); |
| |
| final IObservableSet children = new WritableSet(); |
| final IObservableSet children2 = new WritableSet(); |
| initContentProvider(new IObservableFactory() { |
| @Override |
| public IObservable createObservable(Object target) { |
| if (target == input) |
| return children; |
| if (target == input2) |
| return children2; |
| return null; |
| } |
| }); |
| |
| Object element = new Object(); |
| children.add(element); |
| |
| IObservableSet knownElements = contentProvider.getKnownElements(); |
| assertEquals(Collections.singleton(element), knownElements); |
| viewer.setInput(input2); |
| assertEquals(Collections.EMPTY_SET, knownElements); |
| } |
| |
| @Test |
| public void testInputChanged_ClearsRealizedElements() { |
| input = new Object(); |
| final Object input2 = new Object(); |
| |
| final IObservableSet children = new WritableSet(); |
| final IObservableSet children2 = new WritableSet(); |
| initContentProvider(new IObservableFactory() { |
| @Override |
| public IObservable createObservable(Object target) { |
| if (target == input) |
| return children; |
| if (target == input2) |
| return children2; |
| return null; |
| } |
| }); |
| |
| // Realized elements must be allocated before adding the element |
| // otherwise we'd have to spin the event loop to see the new element |
| IObservableSet realizedElements = contentProvider.getRealizedElements(); |
| |
| Object element = new Object(); |
| children.add(element); |
| |
| assertEquals(Collections.singleton(element), realizedElements); |
| viewer.setInput(input2); |
| assertEquals(Collections.EMPTY_SET, realizedElements); |
| } |
| |
| static class Mutable { |
| private int id; |
| |
| public Mutable() { |
| this(0); |
| } |
| |
| public Mutable(int id) { |
| this.id = id; |
| } |
| |
| public void mutate() { |
| id++; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| Mutable that = (Mutable) obj; |
| return this.id == that.id; |
| } |
| |
| @Override |
| public int hashCode() { |
| return id; |
| } |
| } |
| } |