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+;;; test-vterm-toggle--dispatch.el --- Tests for cj/--vterm-toggle-dispatch -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; Pure decision helper for F12.  Returns one of (toggle-off . WIN),
+;; (show-recent . BUFFER), or (create-new) based on whether a vterm
+;; window is currently displayed and whether any vterm buffers are
+;; alive.  Mocking the underlying helpers keeps the dispatch logic
+;; exercisable without touching real windows.
+
+;;; Code:
+
+(require 'ert)
+(require 'cl-lib)
+
+(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
+(require 'eshell-vterm-config)
+
+(defun test-vterm-toggle--dispatch-cleanup ()
+  "Kill any leftover test buffers."
+  (dolist (b (buffer-list))
+    (let ((name (buffer-name b)))
+      (when (string-prefix-p "*test-vterm" name)
+        (kill-buffer b)))))
+
+(ert-deftest test-vterm-toggle--dispatch-window-displayed-returns-toggle-off ()
+  "Normal: displayed vterm window -> (toggle-off . WIN)."
+  (let ((sentinel-win 'fake-window))
+    (cl-letf (((symbol-function 'cj/--vterm-toggle-displayed-window)
+               (lambda (&optional _frame) sentinel-win)))
+      (should (equal (cj/--vterm-toggle-dispatch)
+                     (cons 'toggle-off sentinel-win))))))
+
+(ert-deftest test-vterm-toggle--dispatch-no-window-buffer-alive-returns-show-recent ()
+  "Normal: no displayed vterm, at least one alive -> show-recent + first."
+  (test-vterm-toggle--dispatch-cleanup)
+  (let ((b1 (get-buffer-create "*test-vterm-mru-1*"))
+        (b2 (get-buffer-create "*test-vterm-mru-2*")))
+    (unwind-protect
+        (cl-letf (((symbol-function 'cj/--vterm-toggle-displayed-window)
+                   (lambda (&optional _frame) nil))
+                  ((symbol-function 'cj/--vterm-toggle-buffers)
+                   (lambda () (list b1 b2))))
+          (should (equal (cj/--vterm-toggle-dispatch)
+                         (cons 'show-recent b1))))
+      (kill-buffer b1)
+      (kill-buffer b2))))
+
+(ert-deftest test-vterm-toggle--dispatch-no-window-no-buffer-returns-create-new ()
+  "Boundary: nothing displayed, no alive vterms -> create-new."
+  (test-vterm-toggle--dispatch-cleanup)
+  (cl-letf (((symbol-function 'cj/--vterm-toggle-displayed-window)
+             (lambda (&optional _frame) nil))
+            ((symbol-function 'cj/--vterm-toggle-buffers)
+             (lambda () nil)))
+    (should (equal (cj/--vterm-toggle-dispatch) '(create-new)))))
+
+(provide 'test-vterm-toggle--dispatch)
+;;; test-vterm-toggle--dispatch.el ends here