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/*
* 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.PrintWriter;
import java.io.UnsupportedEncodingException;
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();
FileOutputStream fos = new FileOutputStream(file);
fos.write(FILE_CONTENTS.getBytes());
fos.close();
test(true, file);
file.delete();
}
private static void test(boolean exists, File file) throws Throwable {
/* PrintWriter(File file, String csn) */
try {
new PrintWriter(file, UNSUPPORTED_CHARSET);
fail();
} catch(FileNotFoundException|UnsupportedEncodingException e) {
pass();
}
check(exists, file);
try {
new PrintWriter(file, (String)null);
fail();
} catch(FileNotFoundException|NullPointerException e) {
pass();
}
check(exists, file);
/* PrintWriter(String fileName, String csn) */
try {
new PrintWriter(file.getName(), UNSUPPORTED_CHARSET);
fail();
} catch(FileNotFoundException|UnsupportedEncodingException e) {
pass();
}
check(exists, file);
try {
new PrintWriter(file.getName(), (String)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");}
}
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