tree 36d2657f5b778a2504e0f35661df15844bfac03f
parent 460784a97f8505c0b7bc738492e305a4ea1298b5
author Paul Duffin <paulduffin@google.com> 1529588851 +0100
committer Paul Duffin <paulduffin@google.com> 1529934433 +0100

Create empty zip files using ZipOutputStream

There was an Android patch on ZipOutputStream that prevented it from
being used to create an empty zip. The behavior has been in Android
since version 1. It looks as though that was because the RI did not
allow that (or allow reading an empty zip). Since then upstream has
changed behavior to allow both creation and reading of empty zip.
Android already supports reading an empty zip (there is a test for
that) and this adds support for creating an empty zip.

Extended the existing test to verify that the empty zip file can be
read by the ZipInputStream and ZipFile.

The upstream bugs relating to this are:
* JDK-6440786 - Cannot create a ZIP file containing zero entries
* JDK-6334003 - ZipFile throws ZipException on open a empty zipfile
                from winzip

Bug: 110251104
Test: ran CtsLibcoreTestCases
Change-Id: Ib9ae603b44b4b25c0cb23a1c96547397089eca55