RFR: 8279283 - BufferedInputStream should override transferTo [v9]

[Jaikiran Pai]

On Tue, 6 Sep 2022 17:20:22 GMT, Markus KARG <duke at openjdk.org> wrote:

>> Implementation of JDK-8279283
>
> Markus KARG has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert "HexPrinter::transferTo"
>   
>   This reverts commit 6f0e2a8f7be5706b39a8e9bc88a97f34d2819098.

test/jdk/java/io/BufferedInputStream/TransferTo.java line 105:

> 103:     public void testStreamContents() throws Exception {
> 104:         // factory for incoming data provider
> 105:         InputStreamProvider inputStreamProvider = byteArrayInput();

Given that the implementation in this PR now calls the wrapped `InputStream`'s `transferTo` method, should we also include a test where the wrapped `InputStream` is a `FileInputStream` and the target `OutputStream` is a `FileOutputStream`, so that it exercises the `FileChannel#transferTo` code path and verifies the correct data is transferred?

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PR: https://git.openjdk.org/jdk/pull/6935