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.io.UnsupportedEncodingException; 37 import java.nio.file.Files; 38 import java.util.Formatter; 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 realMain(String[] args)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 test(boolean exists, File file)57 private static void test(boolean exists, File file) throws Throwable { 58 /* Formatter(File file, String csn) */ 59 try { 60 new Formatter(file, UNSUPPORTED_CHARSET); 61 fail(); 62 } catch(FileNotFoundException|UnsupportedEncodingException e) { 63 pass(); 64 } 65 66 check(exists, file); 67 68 try { 69 new Formatter(file, null); 70 fail(); 71 } catch(FileNotFoundException|NullPointerException e) { 72 pass(); 73 } 74 75 check(exists, file); 76 77 /* Formatter(String fileName, String csn) */ 78 try { 79 new Formatter(file.getName(), UNSUPPORTED_CHARSET); 80 fail(); 81 } catch(FileNotFoundException|UnsupportedEncodingException e) { 82 pass(); 83 } 84 85 check(exists, file); 86 87 try { 88 new Formatter(file.getName(), null); 89 fail(); 90 } catch(FileNotFoundException|NullPointerException e) { 91 pass(); 92 } 93 94 check(exists, file); 95 } 96 check(boolean exists, File file)97 private static void check(boolean exists, File file) { 98 if (exists) { 99 /* the file should be unchanged */ 100 verifyContents(file); 101 } else { 102 /* the file should not have been created */ 103 if (file.exists()) { fail(file + " should not have been created"); } 104 } 105 } 106 verifyContents(File file)107 private static void verifyContents(File file) { 108 try (FileInputStream fis = new FileInputStream(file)) { 109 byte[] contents = FILE_CONTENTS.getBytes(); 110 int read, count = 0; 111 while ((read = fis.read()) != -1) { 112 if (read != contents[count++]) { 113 fail("file contents have been altered"); 114 return; 115 } 116 } 117 } catch (IOException ioe) { 118 unexpected(ioe); 119 } 120 } 121 122 //--------------------- Infrastructure --------------------------- 123 static volatile int passed = 0, failed = 0; pass()124 static void pass() {passed++;} fail()125 static void fail() {failed++; Thread.dumpStack();} fail(String message)126 static void fail(String message) {System.out.println(message); fail(); } unexpected(Throwable t)127 static void unexpected(Throwable t) {failed++; t.printStackTrace();} main(String[] args)128 public static void main(String[] args) throws Throwable { 129 try {realMain(args);} catch (Throwable t) {unexpected(t);} 130 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); 131 if (failed > 0) throw new AssertionError("Some tests failed");} 132 } 133