[ipv6]: 8224019: test/jdk/java/nio/channels/DatagramChannel/BasicMulticastTests.java assumes IPv4 is always available

[Daniel Fuchs]

Hi Arthur,

Shouldn't there be a version of
  221             exceptionTests(nif);
that works with IPv6?

If no machine has IPv4 available, then these exceptions
won't be tested any more.

I suspect the test made the assumption that IPv4 was always available,
and therefore testing exceptions with IPv4 addresses was sufficient.
Now if IPv4 is not available, then maybe those exceptional
cases should be tested with IPv6 instead?

(Note: you can log a follow-up issue if you don't want to tackle
  that immediately)

best regards,

-- daniel


On 16/05/2019 01:45, Arthur Eubanks wrote:
> bug: https://bugs.openjdk.java.net/browse/JDK-8224019
> webrev: http://cr.openjdk.java.net/~aeubanks/8224019/webrev.00/index.html
> 
> test/jdk/java/nio/channels/DatagramChannel/BasicMulticastTests.java 
> assumes NetworkConfiguration.probe().ip4MulticastInterfaces().iterator() 
> always has at least one NetworkInterface. Instead it should do something 
> like the IPv6 code right after it where it checks that the iterator is 
> not empty.