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;;; test-ai-vterm--window-geometry.el --- Tests for direction + fraction helpers -*- lexical-binding: t; -*-
;;; Commentary:
;; Two pure helpers used by F9's geometry-preservation feature:
;;
;; - `cj/--ai-vterm-window-direction' classifies a window's position
;; relative to its frame as right / below / left / above (with a
;; right fallback when the window fills the frame).
;;
;; - `cj/--ai-vterm-window-fraction' returns the window's size on
;; the matching axis as a fraction of the frame.
;;
;; Tests use real window splits in `save-window-excursion' rather
;; than mocking, since the helpers consume `window-edges' and
;; `frame-width' / `frame-height' directly.
;;; Code:
(require 'ert)
(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
(require 'ai-vterm)
(ert-deftest test-ai-vterm--window-direction-right-split ()
"Normal: 2-window vertical split, right-side window -> right."
(save-window-excursion
(delete-other-windows)
(let ((right (split-window (selected-window) nil 'right)))
(should (eq (cj/--ai-vterm-window-direction right) 'right)))))
(ert-deftest test-ai-vterm--window-direction-left-split ()
"Normal: 2-window vertical split, left-side window -> left."
(save-window-excursion
(delete-other-windows)
(split-window (selected-window) nil 'right)
(should (eq (cj/--ai-vterm-window-direction (selected-window)) 'left))))
(ert-deftest test-ai-vterm--window-direction-below-split ()
"Normal: 2-window horizontal split, bottom window -> below."
(save-window-excursion
(delete-other-windows)
(let ((below (split-window (selected-window) nil 'below)))
(should (eq (cj/--ai-vterm-window-direction below) 'below)))))
(ert-deftest test-ai-vterm--window-direction-above-split ()
"Normal: 2-window horizontal split, top window -> above."
(save-window-excursion
(delete-other-windows)
(split-window (selected-window) nil 'below)
(should (eq (cj/--ai-vterm-window-direction (selected-window)) 'above))))
(ert-deftest test-ai-vterm--window-direction-single-window-fallback ()
"Boundary: single-window frame -> default right."
(save-window-excursion
(delete-other-windows)
(should (eq (cj/--ai-vterm-window-direction (selected-window)) 'right))))
(ert-deftest test-ai-vterm--window-size-right-split-returns-body-cols ()
"Normal: right window -> integer body-cols matching window-body-width."
(save-window-excursion
(delete-other-windows)
(let* ((right (split-window (selected-window) nil 'right))
(size (cj/--ai-vterm-window-size right 'right)))
(should (integerp size))
(should (= size (window-body-width right))))))
(ert-deftest test-ai-vterm--window-size-below-split-returns-body-lines ()
"Normal: bottom window -> integer body-lines matching window-body-height."
(save-window-excursion
(delete-other-windows)
(let* ((below (split-window (selected-window) nil 'below))
(size (cj/--ai-vterm-window-size below 'below)))
(should (integerp size))
(should (= size (window-body-height below))))))
(ert-deftest test-ai-vterm--window-size-narrow-right-split ()
"Normal: deliberately narrow right window -> matching body-col count."
(save-window-excursion
(delete-other-windows)
(let* ((frame-w (frame-width))
(target-cols (/ frame-w 4))
(right (split-window (selected-window) (- target-cols) 'right))
(size (cj/--ai-vterm-window-size right 'right)))
(should (integerp size))
(should (= size (window-body-width right))))))
(provide 'test-ai-vterm--window-geometry)
;;; test-ai-vterm--window-geometry.el ends here
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