#+TITLE: QA 01 — Render Cycle & Present
#+TODO: TODO | PASS FAIL SKIP

* How to run
  : emacs --no-init-file -l qa/01-render-cycle/test.el
  : EMACS_GPU_DISABLE=1 emacs --no-init-file -l qa/01-render-cycle/test.el

  Follow the interactive steps printed in the =*QA: Render Cycle*= buffer.

* Checklist

** TODO 1.1 No black flash on startup
   The window must be fully painted before it becomes visible.
   Failure: a black or white frame appears for 1–2 vblanks then snaps to content.

** TODO 1.2 No content flash when switching buffers
   Press =C-x b= to go to =*scratch*=, then back.
   Failure: the previous buffer's content flickers in for one frame.

** TODO 1.3 No black band on WM resize
   Drag the window border with the mouse.
   Failure: a black or garbled band appears at the trailing edge during resize.

** TODO 1.4 No flash when toggling tab-bar
   Press =C-x t t= to toggle the tab-bar.
   Failure: a fully white frame flashes before the tab-bar appears.

** TODO 1.5 No flash when opening / closing the minibuffer
   Press =M-x= then =C-g=.
   Failure: the area below the last window flickers white or shows garbage.

** TODO 1.6 Mouse-face does not flicker
   Move the mouse slowly over the mode-line buttons or links in the buffer.
   Failure: highlight appears and immediately disappears for one frame before settling.

** TODO 1.7 Iconify and restore
   Minimize the window (=C-z= or WM title bar) and restore it.
   Failure: content is not redrawn correctly after restore.