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/*
* Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 4313887 6907737
* @summary Tests that walkFileTree is consistent with the native find program
* @requires (os.family != "windows")
* @library /test/lib
* @build jdk.test.lib.Utils
* jdk.test.lib.Asserts
* jdk.test.lib.JDKToolFinder
* jdk.test.lib.JDKToolLauncher
* jdk.test.lib.Platform
* jdk.test.lib.process.*
* CreateFileTree
* @run testng/othervm -Djava.io.tmpdir=. FindTest
*/
import java.io.IOException;
import java.nio.file.FileSystemLoopException;
import java.nio.file.FileVisitOption;
import java.nio.file.FileVisitResult;
import java.nio.file.FileVisitor;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Random;
import java.util.Set;
import java.util.stream.Collectors;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
public class FindTest {
private static final Random rand = new Random();
private static final boolean isAIX = System.getProperty("os.name").equals("AIX");
private static Path top;
private static String TOP;
@BeforeClass
public static void createFileTree() throws Exception {
top = CreateFileTree.create();
TOP = top.toAbsolutePath().toString();
}
@Test
public void printTreeTest() throws Throwable {
// print the file tree and compare output with find(1)
assertOutputEquals(printFileTree(top), runFind("find", TOP));
}
@Test
public void printTreeFollowLinkTest() throws Throwable {
// print the file tree, following links, and compare output with find(1).
// On AIX "find -follow" may core dump on recursive links without '-L'
// see: http://www-01.ibm.com/support/docview.wss?uid=isg1IV28143
String[] cmds = isAIX
? new String[]{"find", "-L", TOP, "-follow"}
: new String[]{"find", TOP, "-follow"};
OutputAnalyzer expected = runFind(cmds);
// Some versions of find(1) output cycles (sym links to ancestor
// directories), other versions do not. For that reason we run
// PrintFileTree with the -printCycles option when the output without
// this option differs to find(1).
try {
assertOutputEquals(printFileTree(top, "-follow"), expected);
} catch (AssertionError x) {
assertOutputEquals(printFileTree(top, "-follow", "-printCycles"), expected);
}
}
private void assertOutputEquals(List<String> actual, OutputAnalyzer expected)
throws IOException {
List<String> expectedList = Arrays.asList(expected.getStdout()
.split(System.lineSeparator()));
assertEquals(actual.size(), expectedList.size());
assertTrue(actual.removeAll(expectedList));
}
private OutputAnalyzer runFind(String... cmds) throws Throwable {
return ProcessTools.executeCommand(cmds);
}
/**
* Invokes Files.walkFileTree to traverse a file tree and prints
* each of the directories and files. The -follow option causes symbolic
* links to be followed and the -printCycles option will print links
* where the target of the link is an ancestor directory.
*/
private static List<String> printFileTree(Path dir, String... opts) throws Exception {
List<Path> fileTreeList = new ArrayList<>();
List<String> optsList = Arrays.asList(opts);
boolean followLinks = optsList.contains("-follow");
boolean reportCycles = optsList.contains("-printCycles");
Set<FileVisitOption> options = new HashSet<>();
if (followLinks)
options.add(FileVisitOption.FOLLOW_LINKS);
Files.walkFileTree(dir, options, Integer.MAX_VALUE, new FileVisitor<Path>() {
@Override
public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {
fileTreeList.add(dir);
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
fileTreeList.add(file);
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory(Path dir, IOException exc)
throws IOException
{
if (exc != null)
throw exc;
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult visitFileFailed(Path file, IOException exc)
throws IOException
{
if (followLinks && (exc instanceof FileSystemLoopException)) {
if (reportCycles)
fileTreeList.add(file);
return FileVisitResult.CONTINUE;
} else {
throw exc;
}
}
});
return fileTreeList.stream()
.map(f -> f.toAbsolutePath().toString())
.collect(Collectors.toCollection(ArrayList::new));
}
}
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