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.PrintWriter; 37 import java.io.UnsupportedEncodingException; 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 realMain(String[] args)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 FileOutputStream fos = new FileOutputStream(file); 51 fos.write(FILE_CONTENTS.getBytes()); 52 fos.close(); 53 54 test(true, file); 55 file.delete(); 56 } 57 test(boolean exists, File file)58 private static void test(boolean exists, File file) throws Throwable { 59 /* PrintWriter(File file, String csn) */ 60 try { 61 new PrintWriter(file, UNSUPPORTED_CHARSET); 62 fail(); 63 } catch(FileNotFoundException|UnsupportedEncodingException e) { 64 pass(); 65 } 66 67 check(exists, file); 68 69 try { 70 new PrintWriter(file, (String)null); 71 fail(); 72 } catch(FileNotFoundException|NullPointerException e) { 73 pass(); 74 } 75 76 check(exists, file); 77 78 /* PrintWriter(String fileName, String csn) */ 79 try { 80 new PrintWriter(file.getName(), UNSUPPORTED_CHARSET); 81 fail(); 82 } catch(FileNotFoundException|UnsupportedEncodingException e) { 83 pass(); 84 } 85 86 check(exists, file); 87 88 try { 89 new PrintWriter(file.getName(), (String)null); 90 fail(); 91 } catch(FileNotFoundException|NullPointerException e) { 92 pass(); 93 } 94 95 check(exists, file); 96 } 97 check(boolean exists, File file)98 private static void check(boolean exists, File file) { 99 if (exists) { 100 /* the file should be unchanged */ 101 verifyContents(file); 102 } else { 103 /* the file should not have been created */ 104 if (file.exists()) { fail(file + " should not have been created"); } 105 } 106 } 107 verifyContents(File file)108 private static void verifyContents(File file) { 109 try (FileInputStream fis = new FileInputStream(file)) { 110 byte[] contents = FILE_CONTENTS.getBytes(); 111 int read, count = 0; 112 while ((read = fis.read()) != -1) { 113 if (read != contents[count++]) { 114 fail("file contents have been altered"); 115 return; 116 } 117 } 118 } catch (IOException ioe) { 119 unexpected(ioe); 120 } 121 } 122 123 //--------------------- Infrastructure --------------------------- 124 static volatile int passed = 0, failed = 0; pass()125 static void pass() {passed++;} fail()126 static void fail() {failed++; Thread.dumpStack();} fail(String message)127 static void fail(String message) {System.out.println(message); fail(); } unexpected(Throwable t)128 static void unexpected(Throwable t) {failed++; t.printStackTrace();} main(String[] args)129 public static void main(String[] args) throws Throwable { 130 try {realMain(args);} catch (Throwable t) {unexpected(t);} 131 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); 132 if (failed > 0) throw new AssertionError("Some tests failed");} 133 } 134