1 /*
   2  * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.nio.file.*;
  25 import java.nio.file.attribute.BasicFileAttributes;
  26 import java.util.Random;
  27 import java.io.IOException;
  28 
  29 public class TestUtil {
  30     private TestUtil() {
  31     }
  32 
  33     static Path createTemporaryDirectory(String where) throws IOException {
  34         Path dir = FileSystems.getDefault().getPath(where);
  35         return Files.createTempDirectory(dir, "name");
  36     }
  37 
  38     static Path createTemporaryDirectory() throws IOException {
  39         return Files.createTempDirectory("name");
  40     }
  41 
  42     static void removeAll(Path dir) throws IOException {
  43         Files.walkFileTree(dir, new FileVisitor<Path>() {
  44             @Override
  45             public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {
  46                 return FileVisitResult.CONTINUE;
  47             }
  48             @Override
  49             public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
  50                 try {
  51                     Files.delete(file);
  52                 } catch (IOException x) {
  53                     System.err.format("Unable to delete %s: %s\n", file, x);
  54                 }
  55                 return FileVisitResult.CONTINUE;
  56             }
  57             @Override
  58             public FileVisitResult postVisitDirectory(Path dir, IOException exc) {
  59                 try {
  60                     Files.delete(dir);
  61                 } catch (IOException x) {
  62                     System.err.format("Unable to delete %s: %s\n", dir, x);
  63                 }
  64                 return FileVisitResult.CONTINUE;
  65             }
  66             @Override
  67             public FileVisitResult visitFileFailed(Path file, IOException exc) {
  68                 System.err.format("Unable to visit %s: %s\n", file, exc);
  69                 return FileVisitResult.CONTINUE;
  70             }
  71         });
  72     }
  73 
  74     static void deleteUnchecked(Path file) {
  75         try {
  76             Files.delete(file);
  77         } catch (IOException exc) {
  78             System.err.format("Unable to delete %s: %s\n", file, exc);
  79         }
  80     }
  81 
  82     /**
  83      * Creates a directory tree in the given directory so that the total
  84      * size of the path is more than 2k in size. This is used for long
  85      * path tests on Windows.
  86      */
  87     static Path createDirectoryWithLongPath(Path dir)
  88         throws IOException
  89     {
  90         StringBuilder sb = new StringBuilder();
  91         for (int i=0; i<240; i++) {
  92             sb.append('A');
  93         }
  94         String name = sb.toString();
  95         do {
  96             dir = dir.resolve(name).resolve(".");
  97             Files.createDirectory(dir);
  98         } while (dir.toString().length() < 2048);
  99         return dir;
 100     }
 101 
 102     /**
 103      * Returns true if symbolic links are supported
 104      */
 105     static boolean supportsLinks(Path dir) {
 106         Path link = dir.resolve("testlink");
 107         Path target = dir.resolve("testtarget");
 108         try {
 109             Files.createSymbolicLink(link, target);
 110             Files.delete(link);
 111             return true;
 112         } catch (UnsupportedOperationException x) {
 113             return false;
 114         } catch (IOException x) {
 115             return false;
 116         }
 117     }
 118 }