doc: restrict the ES.Next features usage in tests
Update the writing-tests
guide to restrict the ES.Next features usage in tests for the ease of backporting (only encourage to use those features that can be used directly without a flag in all maintained branches
) .
Refs: https://github.com/nodejs/node/pull/11290
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
doc