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/*
* Copyright (c) 2008, 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 6334003 6440786
* @summary Test ability to write and read zip files that have no entries.
* @author Dave Bristor
*/
import java.io.*;
import java.util.*;
import java.util.zip.*;
public class TestEmptyZip {
public static void realMain(String[] args) throws Throwable {
String zipName = "foo.zip";
File f = new File(System.getProperty("test.scratch", "."), zipName);
if (f.exists() && !f.delete()) {
throw new Exception("failed to delete " + zipName);
}
f.createNewFile();
try {
// Verify 0-length file cannot be read
checkCannotRead(f);
// Verify non-zip file cannot be read
OutputStream out = new FileOutputStream(f);
try {
out.write("class Foo { }".getBytes());
} finally {
out.close();
}
checkCannotRead(f);
} finally {
f.delete();
}
// Verify 0-entries file can be written
write(f);
// Verify 0-entries file can be read
readFile(f);
readStream(f);
f.delete();
}
static void checkCannotRead(File f) throws IOException {
try {
new ZipFile(f).close();
fail();
} catch (ZipException ze) {
if (f.length() == 0) {
check(ze.getMessage().contains("zip file is empty"));
} else {
pass();
}
}
try (FileInputStream fis = new FileInputStream(f);
ZipInputStream zis = new ZipInputStream(fis))
{
ZipEntry ze = zis.getNextEntry();
check(ze == null);
} catch (IOException ex) {
unexpected(ex);
}
}
static void write(File f) throws Exception {
try (FileOutputStream fis = new FileOutputStream(f);
ZipOutputStream zos = new ZipOutputStream(fis))
{
zos.finish();
pass();
} catch (Exception ex) {
unexpected(ex);
}
}
static void readFile(File f) throws Exception {
try (ZipFile zf = new ZipFile(f)) {
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry entry = (ZipEntry) e.nextElement();
fail();
}
pass();
} catch (Exception ex) {
unexpected(ex);
}
}
static void readStream(File f) throws Exception {
try (FileInputStream fis = new FileInputStream(f);
ZipInputStream zis = new ZipInputStream(fis))
{
ZipEntry ze = zis.getNextEntry();
check(ze == null);
byte[] buf = new byte[1024];
check(zis.read(buf, 0, 1024) == -1);
}
}
//--------------------- Infrastructure ---------------------------
static volatile int passed = 0, failed = 0;
static boolean pass() {passed++; return true;}
static boolean fail() {failed++; Thread.dumpStack(); return false;}
static boolean fail(String msg) {System.out.println(msg); return fail();}
static void unexpected(Throwable t) {failed++; t.printStackTrace();}
static boolean check(boolean cond) {if (cond) pass(); else fail(); return cond;}
static boolean equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) return pass();
else return fail(x + " not equal to " + y);}
public static void main(String[] args) throws Throwable {
try {realMain(args);} catch (Throwable t) {unexpected(t);}
System.out.println("\nPassed = " + passed + " failed = " + failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
}
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