test: skip test_lookup_ipv6_hint on FreeBSD

[Trott]

FreeBSD does not support the V4MAPPED flag so skip the test that uses it.

I hacked the Makefile to run this on CI to confirm that it had been failing and that this change would cause it to pass. There are other failures, but they are for other tests. https://ci.nodejs.org/job/node-test-commit-other/518/

[Trott]

/cc @jbergstroem

[Trott]

Fixes 2 out of 8 systems listed for the test at #2468

[Trott]

CI: https://ci.nodejs.org/job/node-test-pull-request/259/

(Kind of pointless because the tests in test/internet don't run in CI yet, but you know, just in case or something.)

[jbergstroem]

LGTM

[thefourtheye]

Can this message be changed to FreeBSD does not support V4MAPPED flag.?

[jbergstroem]

@thefourtheye if so, perhaps squeeze both test_lookup_ipv6_hint and v4mapped in there? wouldn't tap just report internet/test-dns.js and not the actual test name.

[thefourtheye]

@jbergstroem Unfortunately, nope. It will not know the specific test :( I thought that if we specified the actual reason, it would be better to understand why it is skipped.

Now there is another interesting thing here. If we skip more than one tests in a single file, then there will be two skip TAP lines. I wonder how the output will be displayed.

[jbergstroem]

@thefourtheye yeah, not too much to do about "double skipping" unless we're keen to start rewriting larger parts of our tests. Long term we should look at replacing the current runner with something build on top of node-tap or similar. There's an issue about this somewhere..

anyway, moving forward; I'm ok with either message.

[brendanashworth]

Long term we should look at replacing the current runner with something build on top of node-tap or similar

cheers

[thefourtheye]

LGTM

[Trott]

I wonder if I should rewrite it so that it checks the error on FreeBSD rather than skips the test? That has the benefits of:

• Avoiding the tap issues described in other comments
• Guaranteeing that someone will have to remove the FreeBSD exception in the test if FreeBSD changes and supports V4MAPPED

[Trott]

How about we do this instead? #2724

[Trott]

Closing in favor of #2724