RFR: 8265891: (ch) InputStream returned by Channels.newInputStream should override transferTo

[Brian Burkhalter]

On Jun 18, 2021, at 6:36 AM, Alan Bateman <alanb at openjdk.java.net<mailto:alanb at openjdk.java.net>> wrote:

Adding an override of transferTo may require new tests. @bplb Do you if we have good tests for all the scenarios where input stream returned by Channels.newInputStream is the source?

There are not a lot of tests for the `InputStream` returned by `Channels.newInputStream`:

 `java/nio/channels/Channels`:

`Basic.java` - reading from a wrapped `FileChannel`
`ReadByte.java` - trivial
`Basic2.java` - reading at random offsets from a wrapped `AsynchronousSocketChannel`
`ReadOffset.java` - trivial

Elsewhere:

`sun/nio/ch/TempBuffer.java`
`jdk/nio/zipfs/ZipFSTester.java`


I don’t see that `transferTo()` on such a stream is tested anywhere.
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