| /******************************************************************************* |
| * Copyright (c) 2005, 2015 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Danail Nachev - Bug 197605 [Test Harness] FileSystemComparator use timestamp as size |
| *******************************************************************************/ |
| package org.eclipse.core.tests.harness; |
| |
| import java.io.BufferedOutputStream; |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.junit.Assert; |
| |
| /** |
| * A utility class that compares file system states. It is able to take snapshot of the file system and save it into a |
| * text file for later comparison. |
| */ |
| public class FileSystemComparator { |
| |
| private static class FileSummary { |
| boolean directory; |
| private String path; |
| private long size; |
| private long timestamp; |
| |
| FileSummary(File file) { |
| if (!file.exists()) { |
| throw new IllegalArgumentException(file + " does not exist"); |
| } |
| path = file.getAbsolutePath(); |
| timestamp = file.lastModified(); |
| size = file.isDirectory() ? -1 : file.length(); |
| } |
| |
| FileSummary(String file, long timestamp, long size) { |
| this.path = file; |
| this.timestamp = timestamp; |
| this.size = directory ? -1 : size; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| return (obj instanceof FileSummary) && ((FileSummary) obj).path.equals(path); |
| } |
| |
| public String getPath() { |
| return path; |
| } |
| |
| public long getSize() { |
| return size; |
| } |
| |
| public long getTimestamp() { |
| return timestamp; |
| } |
| |
| @Override |
| public int hashCode() { |
| return path.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return path + " timestamp: " + timestamp + " size: " + size; |
| } |
| } |
| |
| private static final String SNAPSHOT_FILE_NAME = "snapshot"; |
| |
| public void compareSnapshots(String tag, Object oldOne, Object newOne) { |
| Map<?, ?> oldSnapshot = (Map<?, ?>) oldOne; |
| Map<?, ?> newSnapshot = (Map<?, ?>) newOne; |
| boolean sameSize = oldSnapshot.size() == newSnapshot.size(); |
| for (Object element : newSnapshot.values()) { |
| FileSummary newElement = (FileSummary) element; |
| FileSummary oldElement = (FileSummary) oldSnapshot.get(newElement.getPath()); |
| Assert.assertNotNull(tag + " - " + newElement.getPath() + " was added", oldElement); |
| Assert.assertEquals(tag + " - " + newElement.getPath() + " changed timestamp ", oldElement.getTimestamp(), newElement.getTimestamp()); |
| Assert.assertEquals(tag + " - " + newElement.getPath() + " changed size ", oldElement.getSize(), newElement.getSize()); |
| } |
| // one or more entries were removed |
| // need to do the reverse (take the old snapshot as basis) to figure out what are the missing entries |
| if (!sameSize) { |
| for (Object element : oldSnapshot.values()) { |
| FileSummary oldElement = (FileSummary) element; |
| FileSummary newElement = (FileSummary) newSnapshot.get(oldElement.getPath()); |
| Assert.assertNotNull(tag + " - " + oldElement.getPath() + " was removed", newElement); |
| } |
| } |
| } |
| |
| public Object loadSnapshot(File rootLocation) throws IOException { |
| File summaryFile = new File(rootLocation, SNAPSHOT_FILE_NAME); |
| Map<String, FileSummary> snapshot = new HashMap<>(); |
| try (BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(summaryFile)))) { |
| String line; |
| while ((line = in.readLine()) != null) { |
| String path = line; |
| long timestamp = Long.parseLong(in.readLine()); |
| long size = Long.parseLong(in.readLine()); |
| snapshot.put(path, new FileSummary(path, timestamp, size)); |
| } |
| } |
| return snapshot; |
| } |
| |
| public void saveSnapshot(Object toSave, File rootLocation) throws IOException { |
| File summaryFile = new File(rootLocation, SNAPSHOT_FILE_NAME); |
| PrintWriter out = new PrintWriter(new OutputStreamWriter(new BufferedOutputStream(new FileOutputStream(summaryFile)))); |
| Map<?, ?> snapshot = (Map<?, ?>) toSave; |
| try { |
| for (Object element : snapshot.values()) { |
| FileSummary fileSummary = (FileSummary) element; |
| out.println(fileSummary.getPath()); |
| out.println(fileSummary.getTimestamp()); |
| out.println(fileSummary.getSize()); |
| } |
| } finally { |
| out.close(); |
| } |
| } |
| |
| /** |
| * It is a good idea to skip the root location because when the snapshot file is saved, it may cause |
| * the timestamp for the parent direcotry to change on some OSes. |
| */ |
| public Object takeSnapshot(File rootLocation, boolean skip) { |
| Map<String, FileSummary> snapshot = new HashMap<>(); |
| takeSnapshot(snapshot, rootLocation, skip); |
| return snapshot; |
| } |
| |
| private void takeSnapshot(Map<String, FileSummary> snapshot, File rootLocation, boolean skip) { |
| FileSummary summary = new FileSummary(rootLocation); |
| if (!skip && !rootLocation.getName().equals(SNAPSHOT_FILE_NAME)) { |
| snapshot.put(rootLocation.getAbsolutePath(), summary); |
| } |
| if (!rootLocation.isDirectory()) { |
| return; |
| } |
| File[] entries = rootLocation.listFiles(); |
| if (entries == null) { |
| return; |
| } |
| for (File fileEntry : entries) { |
| takeSnapshot(snapshot, fileEntry, false); |
| } |
| } |
| |
| } |