This commit adds a test to verify that the path argument to
ErrnoException can contain UTF-8 characters.
PR-URL: https://github.com/nodejs/node/pull/13958
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
