test: call functions internally

All (or at least most) of the tests uses lambdas (or arrow functions
if you will) to call these functions internally inside of directly
calling them, this should also use this technique for consistency.

PR-URL: https://github.com/nodejs/node/pull/38560


Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>