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