Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2011 IBM Corporation 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.compare.tests; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.InvocationTargetException; import junit.framework.TestCase; import org.eclipse.compare.CompareConfiguration; import org.eclipse.compare.internal.CompareUIPlugin; import org.eclipse.compare.internal.patch.PatchMessages; import org.eclipse.compare.internal.patch.PatchWizard; import org.eclipse.compare.internal.patch.PatchWizardDialog; import org.eclipse.core.internal.resources.WorkspaceRoot; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IStorage; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.Platform; import org.eclipse.core.runtime.preferences.InstanceScope; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.viewers.TreePath; import org.eclipse.jface.viewers.TreeSelection; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.wizard.IWizardPage; import org.eclipse.swt.dnd.Clipboard; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.PlatformUI; import org.osgi.service.prefs.BackingStoreException; import org.osgi.service.prefs.Preferences; public class PatchUITest extends TestCase { private static final String TEST_PROJECT = "ApplyPatchTest"; private IWorkspaceRoot workspaceRoot = null; private IProject testProject = null; private PatchWizardDialog wizardDialog = null; private PatchWizard wizard = null; public PatchUITest(String name) { super(name); } protected void setUp() throws Exception { super.setUp(); workspaceRoot = ResourcesPlugin.getWorkspace().getRoot(); testProject = workspaceRoot.getProject(TEST_PROJECT); testProject.create(null); testProject.open(null); } protected void tearDown() throws Exception { super.tearDown(); testProject.delete(true, null); } public void testApplyClipboardPatch() throws CoreException { // Clipboard support on Mac OS is not reliable when tests are run // through an SSH session, see bug 272870 for details if (Platform.getOS().equals(Platform.OS_MACOSX)) { return; } copyIntoClipboard("patch_context0.txt"); copyIntoWorkspace("context.txt"); openPatchWizard(); assertTrue(wizard.getPageCount() == 3); IWizardPage patchWizardPage = wizard.getPages()[0]; assertTrue(patchWizardPage.canFlipToNextPage()); callMethod(wizardDialog, "nextPressed", new Object[] {}); processQueuedEvents(); assertTrue(wizard.canFinish()); wizard.performFinish(); wizardDialog.close(); InputStream expected = PatchUtils.asInputStream("exp_context.txt"); InputStream actual = testProject.getFile("context.txt").getContents(); compareStreams(expected, actual); } public void testApplyWorkspacePatch() throws CoreException { copyIntoWorkspace("patch_addition.txt"); openPatchWizard(); assertTrue(wizard.getPageCount() == 3); IWizardPage patchWizardPage = wizard.getPages()[0]; getButton(patchWizardPage, "fUseClipboardButton").setSelection(false); getButton(patchWizardPage, "fUsePatchFileButton").setSelection(false); getButton(patchWizardPage, "fUseWorkspaceButton").setSelection(true); TreeViewer tree = getTreeViewer(patchWizardPage, "fTreeViewer"); treeSelect(tree, TEST_PROJECT + "/patch_addition.txt"); processQueuedEvents(); assertTrue(patchWizardPage.canFlipToNextPage()); callMethod(wizardDialog, "nextPressed", new Object[] {}); assertTrue(wizard.canFinish()); wizard.performFinish(); wizardDialog.close(); InputStream expected = PatchUtils.asInputStream("exp_addition.txt"); InputStream actual = testProject.getFile("exp_addition.txt").getContents(); compareStreams(expected, actual); } public void testApplyClipboardPatch_AdditionWithWindowsLD() throws Exception { // Clipboard support on Mac OS is not reliable when tests are run // through an SSH session, see bug 272870 for details if (Platform.getOS().equals(Platform.OS_MACOSX)) { return; } Preferences workspacePreferences = Platform.getPreferencesService().getRootNode().node(InstanceScope.SCOPE); final String previous = getStoredValue(workspacePreferences); // set new text file line delimiter to "\r\n" (Windows) saveValue(workspacePreferences, "\r\n"); copyIntoClipboard("patch_addition.txt"); openPatchWizard(); assertTrue(wizard.getPageCount() == 3); IWizardPage patchWizardPage = wizard.getPages()[0]; assertTrue(patchWizardPage.canFlipToNextPage()); callMethod(wizardDialog, "nextPressed", new Object[] {}); processQueuedEvents(); assertTrue(wizard.canFinish()); wizard.performFinish(); wizardDialog.close(); InputStream expectedIS = PatchUtils.asInputStream("exp_addition.txt"); InputStream actualIS = testProject.getFile("exp_addition.txt").getContents(); String expected = PatchUtils.asString(expectedIS).replaceAll("\n", "\r\n"); String actual = PatchUtils.asString(actualIS); assertEquals(expected, actual); // restore previously saved value for LD saveValue(workspacePreferences, previous); } /** * Returns the value that is currently stored for the line delimiter. * * @param node * preferences node from which the value should be read * @return the currently stored line delimiter */ private String getStoredValue(Preferences node) { try { // be careful looking up for our node so not to create any nodes as side effect if (node.nodeExists(Platform.PI_RUNTIME)) return node.node(Platform.PI_RUNTIME).get(Platform.PREF_LINE_SEPARATOR, null); } catch (BackingStoreException e) { // ignore } return null; } private void saveValue(Preferences preferences, String val) throws BackingStoreException { Preferences node = preferences.node(Platform.PI_RUNTIME); if (val == null) { node.remove(Platform.PREF_LINE_SEPARATOR); } else { node.put(Platform.PREF_LINE_SEPARATOR, val); } node.flush(); } private void openPatchWizard() { ImageDescriptor patchWizardImage = CompareUIPlugin.getImageDescriptor("wizban/applypatch_wizban.png"); String patchWizardTitle = PatchMessages.PatchWizard_title; IStorage patch = null; IResource target = null; CompareConfiguration configuration = new CompareConfiguration(); wizard = new PatchWizard(patch, target, configuration); if (patchWizardImage != null) wizard.setDefaultPageImageDescriptor(patchWizardImage); if (patchWizardTitle != null) wizard.setWindowTitle(patchWizardTitle); wizard.setNeedsProgressMonitor(true); wizardDialog = new PatchWizardDialog(getShell(), wizard); wizardDialog.setBlockOnOpen(false); wizardDialog.open(); } private void copyIntoClipboard(String name) { Clipboard clipboard = new Clipboard(getShell().getDisplay()); InputStream patchIS = PatchUtils.asInputStream(name); String patch = null; try { patch = PatchUtils.asString(patchIS); } catch (IOException e) { fail(e.getMessage()); } TextTransfer textTransfer = TextTransfer.getInstance(); Transfer[] transfers = new Transfer[] { textTransfer }; Object[] data = new Object[] { patch }; clipboard.setContents(data, transfers); clipboard.dispose(); } private void copyIntoWorkspace(String name) { IFile file = testProject.getFile(name); InputStream is = PatchUtils.asInputStream(name); try { file.create(is, true, null); } catch (CoreException e) { fail(e.getMessage()); } } private void compareStreams(InputStream expectedIS, InputStream actualIS) { String expected = null; String actual = null; try { expected = PatchUtils.asString(expectedIS); actual = PatchUtils.asString(actualIS); } catch (IOException e) { fail(e.getMessage()); } assertEquals(expected, actual); } private void treeSelect(TreeViewer tree, String path) { WorkspaceRoot root = (WorkspaceRoot) tree.getInput(); IFile file = root.getFile(path); TreePath treePath = new TreePath(new Object[] { file }); TreeSelection sel = new TreeSelection(treePath); tree.setSelection(sel); } private Button getButton(Object object, String name) { return (Button) getField(object, name); } private TreeViewer getTreeViewer(Object object, String name) { return (TreeViewer) getField(object, name); } private Object getField(Object object, String name) { Object ret = null; try { ret = ReflectionUtils.getField(object, name); } catch (IllegalArgumentException e) { fail(e.getMessage()); } catch (SecurityException e) { fail(e.getMessage()); } catch (IllegalAccessException e) { fail(e.getMessage()); } catch (NoSuchFieldException e) { fail(e.getMessage()); } return ret; } private Object callMethod(Object object, String name, Object args[]) { Object ret = null; try { ret = ReflectionUtils.callMethod(object, name, args); } catch (IllegalArgumentException e) { fail(e.getMessage()); } catch (IllegalAccessException e) { fail(e.getMessage()); } catch (InvocationTargetException e) { fail(e.getMessage()); } catch (NoSuchMethodException e) { fail(e.getMessage()); } return ret; } private Shell getShell() { return PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(); } private void processQueuedEvents() { while (Display.getCurrent().readAndDispatch()) { // Process all the events in the queue } } }