Testing ansible playbook in molecule with "become"

[Hikaru Kenta]

Hello, i wrote a playbook(s) to provision my local system.
https://github.com/kentahikaru/ansible-playbook-provision-ArchLinux
The idea is, to get my system into more less current state, after reinstall.
I'm trying to write a molecule testing (and later testing in github actions).
However,

First of all, my playbooks are connecting to localhost:

- hosts: localhost

connection: local
How will that work in molecule? Will hosts and connection be rewritten from converge.yml ?

Second, how can i pass "become password" from molecule to playbook ?
In my playbook i need "become" in several places, to install packages or setup something.
However molecule is failing on "sudo: a password is required\n"

Thanks for any help.