| /******************************************************************************* |
| * Copyright (c) 2006, 2009 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 |
| * Boris Bokowski, IBM - bug 209484 |
| * Matthew Hall - bug 263956 |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.tests.databinding.viewers; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertSame; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.databinding.observable.Observables; |
| import org.eclipse.core.databinding.observable.set.IObservableSet; |
| import org.eclipse.core.databinding.observable.set.WritableSet; |
| import org.eclipse.jface.databinding.swt.DisplayRealm; |
| import org.eclipse.jface.databinding.viewers.ObservableSetContentProvider; |
| import org.eclipse.jface.tests.databinding.AbstractSWTTestCase; |
| import org.eclipse.jface.viewers.TableViewer; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * @since 3.3 |
| * |
| */ |
| public class ObservableSetContentProviderTest extends AbstractSWTTestCase { |
| private Shell shell; |
| private TableViewer viewer; |
| private ObservableSetContentProvider contentProvider; |
| private IObservableSet input; |
| |
| @Before |
| public void setUp() throws Exception { |
| super.setUp(); |
| shell = new Shell(); |
| viewer = new TableViewer(shell, SWT.NONE); |
| |
| contentProvider = new ObservableSetContentProvider(); |
| viewer.setContentProvider(contentProvider); |
| |
| input = new WritableSet(); |
| viewer.setInput(input); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| shell.dispose(); |
| viewer = null; |
| input = null; |
| super.tearDown(); |
| } |
| |
| @Test |
| public void testKnownElements_Realm() throws Exception { |
| assertSame("realm for the known elements should be the SWT realm", DisplayRealm.getRealm(Display.getDefault()), |
| contentProvider.getKnownElements().getRealm()); |
| } |
| |
| @Test |
| public void testRealizedElements_Realm() { |
| assertSame("realm for the realized elements should be the SWT realm", |
| DisplayRealm.getRealm(Display.getDefault()), contentProvider.getRealizedElements().getRealm()); |
| } |
| |
| @Test |
| public void testKnownElementsAfterSetInput() { |
| assertEquals(0, contentProvider.getKnownElements().size()); |
| Set<String> newElements = new HashSet<String>(Arrays.asList(new String[] { "one", "two", "three" })); |
| WritableSet newInput = new WritableSet(); |
| newInput.addAll(newElements); |
| viewer.setInput(newInput); |
| assertEquals(newElements, contentProvider.getKnownElements()); |
| } |
| |
| @Test |
| public void testViewerUpdate_RemoveElementAfterMutation() { |
| Mutable element = new Mutable(1); |
| input.add(element); |
| |
| assertEquals(1, viewer.getTable().getItemCount()); |
| |
| element.id++; |
| input.clear(); |
| |
| assertEquals(0, viewer.getTable().getItemCount()); |
| } |
| |
| @Test |
| public void testInputChanged_ClearsKnownElements() { |
| Object element = new Object(); |
| input.add(element); |
| |
| IObservableSet knownElements = contentProvider.getKnownElements(); |
| assertEquals(Collections.singleton(element), knownElements); |
| viewer.setInput(Observables.emptyObservableSet()); |
| assertEquals(Collections.EMPTY_SET, knownElements); |
| } |
| |
| @Test |
| public void testInputChanged_ClearsRealizedElements() { |
| // 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(); |
| input.add(element); |
| |
| assertEquals(Collections.singleton(element), realizedElements); |
| viewer.setInput(Observables.emptyObservableSet()); |
| assertEquals(Collections.EMPTY_SET, realizedElements); |
| } |
| |
| static class Mutable { |
| public int id; |
| |
| public Mutable(int id) { |
| this.id = 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; |
| } |
| } |
| } |