test: increase coverage of internal/util

[DavidCai1111]

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• commit message follows commit guidelines

Affected core subsystem(s)

test

[cjihrig]

Does this pass make lint? The comma should be on the previous line.

[cjihrig]

The regex should include. ^ and $.

[cjihrig]

Why not use assert.doesNotThrow()?

[DavidCai1111]

@cjihrig OK, updated :)

[cjihrig]

FWIW, this test won't actually increase test coverage reported at coverage.nodejs.org unless it is run with Node without crypto. And then, it would lose coverage on the else condition.

[addaleax]

CI: https://ci.nodejs.org/job/node-test-commit/7533/

[jasnell]

Failures in CI appear to be unrelated.

[jasnell]

Landed in a7172b5

[MylesBorins]

I had to revert this from v6.x-staging due to an error

=== release test-internal-util-decorate-error-stack ===
Path: parallel/test-internal-util-decorate-error-stack
/Users/mborins/code/node/v6.x/test/parallel/test-internal-util-decorate-error-stack.js:70
internalUtil.setHiddenValue(err, kArrowMessagePrivateSymbolIndex, arrowMessage);
             ^

TypeError: name must be a string
    at TypeError (native)
    at Object.<anonymous> (/Users/mborins/code/node/v6.x/test/parallel/test-internal-util-decorate-error-stack.js:70:14)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
    at run (bootstrap_node.js:394:7)
    at startup (bootstrap_node.js:149:9)
Command: out/Release/node --expose_internals /Users/mborins/code/node/v6.x/test/parallel/test-internal-util-decorate-error-stack.js

It would appear that const kArrowMessagePrivateSymbolIndex = binding['arrow_message_private_symbol']; is returning undefined. Any ideas?

[jasnell]

Odd... I was certain I had run that test locally. Likely missing another commit. This one is likely safe to omit

[MylesBorins]

if this gets backported it should come with #11620