Add ByteStreams.zeroInputStream

[GoogleCodeExporter]

This creates an infinite-length InputStream which returns zero bytes.  Combined 
with ByteStreams.limit this can create large input for tests without consuming 
large amounts of memory.

I created an example with tests here:

https://github.com/maginatics/guava-libraries/pull/1

Original issue reported on code.google.com by g...@maginatics.com on 16 Apr 2013 at 5:54

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Original comment by kak@google.com on 16 Apr 2013 at 5:57

• Added labels: Package-IO, Type-Addition

[GoogleCodeExporter]

Updated pull request with more idiomatic Guava code:

https://github.com/maginatics/guava-libraries/pull/2

One could also expose an infinite length non-zero stream which I use for 
testing as well.

Original comment by g...@maginatics.com on 22 Aug 2013 at 4:45

[GoogleCodeExporter]

I made this utility method more generic and updated it for ByteSource:

    /**
     * @return an infinite-length ByteSource which repeats the contents of a
     *         byte array
     */
    public static ByteSource repeatingArrayByteSource(final byte[] input) {
        return ByteSource.concat(Iterables.cycle(ByteSource.wrap(input)));
    }

Callers can use ByteSource.slice to make make input the desired size.  The 
implementation was not obvious to me and perhaps this is useful to others.

Original comment by g...@maginatics.com on 27 Dec 2013 at 6:21

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This issue has been migrated to GitHub.

It can be found at https://github.com/google/guava/issues/<issue id>

Original comment by cgdecker@google.com on 1 Nov 2014 at 4:12

• Added labels: MigratedToGitHub

[GoogleCodeExporter]

Original comment by cgdecker@google.com on 1 Nov 2014 at 4:18

• Changed state: Migrated

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Original comment by cgdecker@google.com on 3 Nov 2014 at 9:08

• Added labels: Restrict-AddIssueComment-Commit