#+TITLE: QA 12 — Windows & Splits
#+TODO: TODO | PASS FAIL SKIP

* How to run
  : emacs --no-init-file -l qa/12-windows/test.el
  : EMACS_GPU_DISABLE=1 emacs --no-init-file -l qa/12-windows/test.el

* Checklist

** TODO 12.1 Vertical split — divider visible, no content overlap
   After =C-x 2=, the horizontal dividing line must be clearly visible.
   Both window content areas must not overlap.
   Failure: no dividing line visible, or the mode-line of the upper
   window overlaps the first text line of the lower window.

** TODO 12.2 Horizontal split — vertical divider visible
   After =C-x 3=, a vertical dividing line must separate the windows.
   Failure: no line visible between windows, or content is shared.

** TODO 12.3 Window divider >= 3px — first/last pixel colors distinct
   The test sets window-divider width to 6px. The leftmost and rightmost
   pixels of the divider must have different colors.
   Failure: the divider appears as a single solid color stripe.

** TODO 12.4 Resize windows — no artifacts
   Resize with =C-x ^= (taller) and =C-x {= / =C-x }= (narrower/wider).
   Failure: garbled content or black/white bands appear after resize.

** TODO 12.5 Internal border — correct color and width
   The frame must show a 6px border around all its edges in the color
   defined by the internal-border face.
   Failure: border is missing, wrong width, or wrong color.

** TODO 12.6 Multiple frames — independent rendering
   Press =n= to open a second frame. Both frames must render their own
   content independently.
   Failure: one frame shows the content of the other, or one frame goes blank.

** TODO 12.7 Child frame — correct position and no border artifacts
   Press =p= to open a child frame popup. It must appear centered over
   the parent with clean edges (no black or white border bleeding).
   Failure: the popup has a visible artifact on one or more edges.