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1 /* |
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /** |
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25 * @test |
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26 * @bug 7000511 |
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27 * @summary PrintStream, PrintWriter, Formatter, Scanner leave files open when |
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28 * exception thrown |
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29 */ |
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30 |
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31 import java.io.File; |
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32 import java.io.FileInputStream; |
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33 import java.io.FileOutputStream; |
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34 import java.io.FileNotFoundException; |
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35 import java.io.IOException; |
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36 import java.io.PrintWriter; |
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37 import java.io.UnsupportedEncodingException; |
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38 |
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39 public class FailingConstructors { |
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40 static final String fileName = "FailingConstructorsTest"; |
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41 static final String UNSUPPORTED_CHARSET = "unknownCharset"; |
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42 static final String FILE_CONTENTS = "This is a small file!"; |
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43 |
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44 private static void realMain(String[] args) throws Throwable { |
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45 test(false, new File(fileName)); |
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46 |
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47 /* create the file and write its contents */ |
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48 File file = File.createTempFile(fileName, null); |
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49 file.deleteOnExit(); |
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50 FileOutputStream fos = new FileOutputStream(file); |
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51 fos.write(FILE_CONTENTS.getBytes()); |
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52 fos.close(); |
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53 |
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54 test(true, file); |
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55 file.delete(); |
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56 } |
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57 |
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58 private static void test(boolean exists, File file) throws Throwable { |
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59 /* PrintWriter(File file, String csn) */ |
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60 try { |
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61 new PrintWriter(file, UNSUPPORTED_CHARSET); |
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62 fail(); |
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63 } catch(FileNotFoundException|UnsupportedEncodingException e) { |
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64 pass(); |
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65 } |
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66 |
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67 check(exists, file); |
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68 |
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69 try { |
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70 new PrintWriter(file, null); |
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71 fail(); |
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72 } catch(FileNotFoundException|NullPointerException e) { |
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73 pass(); |
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74 } |
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75 |
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76 check(exists, file); |
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77 |
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78 /* PrintWriter(String fileName, String csn) */ |
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79 try { |
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80 new PrintWriter(file.getName(), UNSUPPORTED_CHARSET); |
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81 fail(); |
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82 } catch(FileNotFoundException|UnsupportedEncodingException e) { |
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83 pass(); |
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84 } |
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85 |
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86 check(exists, file); |
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87 |
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88 try { |
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89 new PrintWriter(file.getName(), null); |
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90 fail(); |
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91 } catch(FileNotFoundException|NullPointerException e) { |
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92 pass(); |
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93 } |
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94 |
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95 check(exists, file); |
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96 } |
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97 |
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98 private static void check(boolean exists, File file) { |
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99 if (exists) { |
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100 /* the file should be unchanged */ |
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101 verifyContents(file); |
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102 } else { |
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103 /* the file should not have been created */ |
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104 if (file.exists()) { fail(file + " should not have been created"); } |
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105 } |
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106 } |
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107 |
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108 private static void verifyContents(File file) { |
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109 try (FileInputStream fis = new FileInputStream(file)) { |
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110 byte[] contents = FILE_CONTENTS.getBytes(); |
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111 int read, count = 0; |
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112 while ((read = fis.read()) != -1) { |
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113 if (read != contents[count++]) { |
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114 fail("file contents have been altered"); |
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115 return; |
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116 } |
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117 } |
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118 } catch (IOException ioe) { |
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119 unexpected(ioe); |
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120 } |
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121 } |
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122 |
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123 //--------------------- Infrastructure --------------------------- |
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124 static volatile int passed = 0, failed = 0; |
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125 static void pass() {passed++;} |
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126 static void fail() {failed++; Thread.dumpStack();} |
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127 static void fail(String message) {System.out.println(message); fail(); } |
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128 static void unexpected(Throwable t) {failed++; t.printStackTrace();} |
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129 public static void main(String[] args) throws Throwable { |
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130 try {realMain(args);} catch (Throwable t) {unexpected(t);} |
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131 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
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132 if (failed > 0) throw new AssertionError("Some tests failed");} |
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133 } |