The previous suite pulled ConvertTo-LongPath out of install.ps1 via the AST
and dot-sourced the extracted text. AGENTS.md bans source-reading tests, and
this one showed why: it never executed the script-level Add-Type the kernel32
resolver depends on, so the resolver that does the actual work was untestable
by construction.
Each case now spawns install.ps1 as a real subprocess with a crafted
environment. -ProtocolVersion is a side-effect-free early exit below the
normalization block, so the whole block runs exactly as it does mid-install
and the assertions read what it reports back.
Verified RED against the pre-fix install.ps1 (10 of 24 assertions fail) and
GREEN after. The profile-root substitution is pure path arithmetic, so those
cases run on any host including non-Windows CI.
Co-authored-by: xxxigm <tuancanhnguyen706@gmail.com>
dae7e5477e