1 /*
   2  * Copyright (c) 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 /**
  25  * @test
  26  * @bug 7000511
  27  * @summary PrintStream, PrintWriter, Formatter, Scanner leave files open when
  28  *          exception thrown
  29  */
  30 
  31 import java.io.File;
  32 import java.io.FileInputStream;
  33 import java.io.FileOutputStream;
  34 import java.io.FileNotFoundException;
  35 import java.io.IOException;

  36 import java.nio.file.Files;
  37 import java.util.Scanner;
  38 
  39 public class FailingConstructors {
  40     static final String fileName = "FailingConstructorsTest";
  41     static final String UNSUPPORTED_CHARSET = "unknownCharset";
  42     static final String FILE_CONTENTS = "This is a small file!";
  43 
  44     private static void realMain(String[] args) throws Throwable {
  45         test(false, new File(fileName));
  46 
  47         /* create the file and write its contents */
  48         File file = File.createTempFile(fileName, null);
  49         file.deleteOnExit();
  50         Files.write(file.toPath(), FILE_CONTENTS.getBytes());
  51 
  52         test(true, file);
  53         file.delete();
  54     }
  55 
  56     private static void test(boolean exists, File file) throws Throwable {
  57         /* Scanner(File source, String charsetName) */
  58         try {
  59             new Scanner(file, UNSUPPORTED_CHARSET);
  60             fail();
  61         } catch(FileNotFoundException|IllegalArgumentException e) {
  62             pass();
  63         }
  64 
  65         check(exists, file);
  66 
  67         try {
  68             new Scanner(file, null);







  69             fail();
  70         } catch(FileNotFoundException|NullPointerException e) {
  71             pass();
  72         }
  73 
  74         check(exists, file);
  75 
  76         /* Scanner(FileRef source, String charsetName) */
  77         try {
  78             new Scanner(file.toPath(), UNSUPPORTED_CHARSET);
  79             fail();
  80         } catch(FileNotFoundException|IllegalArgumentException  e) {
  81             pass();
  82         }
  83 
  84         check(exists, file);
  85 
  86         try {
  87             new Scanner(file.toPath(), null);







  88             fail();
  89         } catch(FileNotFoundException|NullPointerException e) {
  90             pass();
  91         }
  92 
  93         check(exists, file);
  94     }
  95 
  96     private static void check(boolean exists, File file) {
  97         if (exists) {
  98             /* the file should be unchanged */
  99             verifyContents(file);
 100         } else {
 101             /* the file should not have been created */
 102             if (file.exists()) { fail(file + " should not have been created"); }
 103         }
 104     }
 105 
 106     private static void verifyContents(File file) {
 107         try (FileInputStream fis = new FileInputStream(file)) {

   1 /*
   2  * Copyright (c) 2011, 2017, 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 /**
  25  * @test
  26  * @bug 7000511 8190577
  27  * @summary PrintStream, PrintWriter, Formatter, Scanner leave files open when
  28  *          exception thrown
  29  */
  30 
  31 import java.io.File;
  32 import java.io.FileInputStream;
  33 import java.io.FileOutputStream;
  34 import java.io.FileNotFoundException;
  35 import java.io.IOException;
  36 import java.nio.charset.Charset;
  37 import java.nio.file.Files;
  38 import java.util.Scanner;
  39 
  40 public class FailingConstructors {
  41     static final String fileName = "FailingConstructorsTest";
  42     static final String UNSUPPORTED_CHARSET = "unknownCharset";
  43     static final String FILE_CONTENTS = "This is a small file!";
  44 
  45     private static void realMain(String[] args) throws Throwable {
  46         test(false, new File(fileName));
  47 
  48         /* create the file and write its contents */
  49         File file = File.createTempFile(fileName, null);
  50         file.deleteOnExit();
  51         Files.write(file.toPath(), FILE_CONTENTS.getBytes());
  52 
  53         test(true, file);
  54         file.delete();
  55     }
  56 
  57     private static void test(boolean exists, File file) throws Throwable {
  58         /* Scanner(File source, String charsetName) */
  59         try {
  60             new Scanner(file, UNSUPPORTED_CHARSET);
  61             fail();
  62         } catch(FileNotFoundException|IllegalArgumentException e) {
  63             pass();
  64         }
  65 
  66         check(exists, file);
  67 
  68         try {
  69             new Scanner(file, (String)null);
  70             fail();
  71         } catch(FileNotFoundException|NullPointerException e) {
  72             pass();
  73         }
  74 
  75         try {
  76             new Scanner(file, (Charset)null);
  77             fail();
  78         } catch(FileNotFoundException|NullPointerException e) {
  79             pass();
  80         }
  81 
  82         check(exists, file);
  83 
  84         /* Scanner(FileRef source, String charsetName) */
  85         try {
  86             new Scanner(file.toPath(), UNSUPPORTED_CHARSET);
  87             fail();
  88         } catch(FileNotFoundException|IllegalArgumentException  e) {
  89             pass();
  90         }
  91 
  92         check(exists, file);
  93 
  94         try {
  95             new Scanner(file.toPath(), (String)null);
  96             fail();
  97         } catch(FileNotFoundException|NullPointerException e) {
  98             pass();
  99         }
 100 
 101         try {
 102             new Scanner(file.toPath(), (Charset)null);
 103             fail();
 104         } catch(FileNotFoundException|NullPointerException e) {
 105             pass();
 106         }
 107 
 108         check(exists, file);
 109     }
 110 
 111     private static void check(boolean exists, File file) {
 112         if (exists) {
 113             /* the file should be unchanged */
 114             verifyContents(file);
 115         } else {
 116             /* the file should not have been created */
 117             if (file.exists()) { fail(file + " should not have been created"); }
 118         }
 119     }
 120 
 121     private static void verifyContents(File file) {
 122         try (FileInputStream fis = new FileInputStream(file)) {