test: increase coverage of vm

[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

[addaleax]

nit: How about

const script = `process.send('${method}'); while(true) {}`;
const options = { breakOnSigint: true };
assert.throws(vm[method](script, ...args, options);

(with args kinda like above… you get the idea. 😄)

[DavidCai1111]

@addaleax Updated, PTAL.

(Since the latest testing-guide says "for the ease of backporting, it is encouraged to use those ES.Next features that can be used directly without a flag in all maintained branches", so here i still use .apply instead of spread operator 😢 )

[addaleax]

@DavidCai1993 This test doesn’t exist in v4.x and won’t ever be backported there, so you can feel completely free to use the spread operator. :)

[DavidCai1111]

@addaleax OK, updated 👍

[addaleax]

LGTM, thanks!

CI: https://ci.nodejs.org/job/node-test-commit/8073/

[addaleax]

Landed in c7205ba, thanks for the PR!

[jasnell]

Does not land cleanly on v4.x due to missing files. Backport PR would be needed