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+/*
+ * Copyright 2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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);
+ }
+
+ // Verify 0-length file cannot be read
+ f.createNewFile();
+ ZipFile zf = null;
+ try {
+ zf = new ZipFile(f);
+ fail();
+ } catch (Exception ex) {
+ check(ex.getMessage().contains("zip file is empty"));
+ } finally {
+ if (zf != null) {
+ zf.close();
+ }
+ }
+
+ ZipInputStream zis = null;
+ try {
+ zis = new ZipInputStream(new FileInputStream(f));
+ ZipEntry ze = zis.getNextEntry();
+ check(ze == null);
+ } catch (Exception ex) {
+ unexpected(ex);
+ } finally {
+ if (zis != null) {
+ zis.close();
+ }
+ }
+
+ 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 write(File f) throws Exception {
+ ZipOutputStream zos = null;
+ try {
+ zos = new ZipOutputStream(new FileOutputStream(f));
+ zos.finish();
+ zos.close();
+ pass();
+ } catch (Exception ex) {
+ unexpected(ex);
+ } finally {
+ if (zos != null) {
+ zos.close();
+ }
+ }
+ }
+
+ static void readFile(File f) throws Exception {
+ ZipFile zf = null;
+ try {
+ zf = new ZipFile(f);
+
+ Enumeration e = zf.entries();
+ while (e.hasMoreElements()) {
+ ZipEntry entry = (ZipEntry) e.nextElement();
+ fail();
+ }
+ zf.close();
+ pass();
+ } catch (Exception ex) {
+ unexpected(ex);
+ } finally {
+ if (zf != null) {
+ zf.close();
+ }
+ }
+ }
+
+ static void readStream(File f) throws Exception {
+ ZipInputStream zis = null;
+ try {
+ zis = new ZipInputStream(new FileInputStream(f));
+ ZipEntry ze = zis.getNextEntry();
+ check(ze == null);
+ byte[] buf = new byte[1024];
+ check(zis.read(buf, 0, 1024) == -1);
+ } finally {
+ if (zis != null) {
+ zis.close();
+ }
+ }
+ }
+
+ //--------------------- 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");}
+}