| /* |
| * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 7000511 |
| * @summary PrintStream, PrintWriter, Formatter, Scanner leave files open when |
| * exception thrown |
| */ |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.UnsupportedEncodingException; |
| import java.nio.file.Files; |
| import java.util.Formatter; |
| |
| public class FailingConstructors { |
| static final String fileName = "FailingConstructorsTest"; |
| static final String UNSUPPORTED_CHARSET = "unknownCharset"; |
| static final String FILE_CONTENTS = "This is a small file!"; |
| |
| private static void realMain(String[] args) throws Throwable { |
| test(false, new File(fileName)); |
| |
| /* create the file and write its contents */ |
| File file = File.createTempFile(fileName, null); |
| file.deleteOnExit(); |
| Files.write(file.toPath(), FILE_CONTENTS.getBytes()); |
| |
| test(true, file); |
| file.delete(); |
| } |
| |
| private static void test(boolean exists, File file) throws Throwable { |
| /* Formatter(File file, String csn) */ |
| try { |
| new Formatter(file, UNSUPPORTED_CHARSET); |
| fail(); |
| } catch(FileNotFoundException|UnsupportedEncodingException e) { |
| pass(); |
| } |
| |
| check(exists, file); |
| |
| try { |
| new Formatter(file, null); |
| fail(); |
| } catch(FileNotFoundException|NullPointerException e) { |
| pass(); |
| } |
| |
| check(exists, file); |
| |
| /* Formatter(String fileName, String csn) */ |
| try { |
| new Formatter(file.getName(), UNSUPPORTED_CHARSET); |
| fail(); |
| } catch(FileNotFoundException|UnsupportedEncodingException e) { |
| pass(); |
| } |
| |
| check(exists, file); |
| |
| try { |
| new Formatter(file.getName(), null); |
| fail(); |
| } catch(FileNotFoundException|NullPointerException e) { |
| pass(); |
| } |
| |
| check(exists, file); |
| } |
| |
| private static void check(boolean exists, File file) { |
| if (exists) { |
| /* the file should be unchanged */ |
| verifyContents(file); |
| } else { |
| /* the file should not have been created */ |
| if (file.exists()) { fail(file + " should not have been created"); } |
| } |
| } |
| |
| private static void verifyContents(File file) { |
| try (FileInputStream fis = new FileInputStream(file)) { |
| byte[] contents = FILE_CONTENTS.getBytes(); |
| int read, count = 0; |
| while ((read = fis.read()) != -1) { |
| if (read != contents[count++]) { |
| fail("file contents have been altered"); |
| return; |
| } |
| } |
| } catch (IOException ioe) { |
| unexpected(ioe); |
| } |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| static volatile int passed = 0, failed = 0; |
| static void pass() {passed++;} |
| static void fail() {failed++; Thread.dumpStack();} |
| static void fail(String message) {System.out.println(message); fail(); } |
| static void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| public static void main(String[] args) throws Throwable { |
| try {realMain(args);} catch (Throwable t) {unexpected(t);} |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new AssertionError("Some tests failed");} |
| } |