--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/zip/TestEmptyZip.java	Thu Sep 11 14:58:57 2008 -0700
@@ -0,0 +1,147 @@
+/*
+ * 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");}
+}