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+;;; test-ai-term--accent.el --- Tests for the agent-terminal accent color -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; Tests the per-terminal accent recolor: the accent face's dupre-blue default,
+;; the palette-index list, the apply helper that points a terminal's 256-color
+;; palette entries at the accent face, and the show-or-create wiring.  eat and
+;; its terminal API are stubbed -- no process spawning, no eat load in batch.
+
+;;; Code:
+
+(require 'ert)
+(require 'cl-lib)
+
+(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
+(require 'ai-term)
+
+(declare-function cj/--ai-term-apply-accent "ai-term-backend-eat" (buffer))
+(declare-function cj/--ai-term-show-or-create "ai-term-backend-eat" (dir name))
+
+(defvar cj/ai-term-accent-color-indices)
+(defvar cj/--ai-term-mru)
+(defvar eat-buffer-name)
+(defvar eat-terminal)
+
+;; eat isn't loaded in batch -- provide stubs so cl-letf has overrides.
+(unless (fboundp 'eat)
+  (defun eat (&optional _program _arg) nil))
+(unless (fboundp 'eat-term-set-parameter)
+  (defun eat-term-set-parameter (_terminal _parameter _value) nil))
+
+;;; ------------------------------ accent face ---------------------------------
+
+(ert-deftest test-ai-term-accent-face-defaults-to-dupre-blue ()
+  "Normal: the accent face exists and defaults to dupre blue (#67809c)."
+  (should (facep 'cj/ai-term-accent))
+  (should (string-equal-ignore-case
+           (face-attribute 'cj/ai-term-accent :foreground nil t)
+           "#67809c")))
+
+(ert-deftest test-ai-term-accent-indices-default ()
+  "Normal: the remapped palette indices default to Claude Code's accent (211)."
+  (should (equal cj/ai-term-accent-color-indices '(211))))
+
+;;; --------------------------- cj/--ai-term-apply-accent ----------------------
+
+(ert-deftest test-ai-term-apply-accent-sets-palette-entries ()
+  "Normal: every configured index is pointed at the accent face via the eat API."
+  (let ((set-params nil))
+    (cl-letf (((symbol-function 'eat-term-set-parameter)
+               (lambda (_terminal parameter value)
+                 (push (cons parameter value) set-params))))
+      (with-temp-buffer
+        (setq-local eat-terminal 'dummy-terminal)
+        (cj/--ai-term-apply-accent (current-buffer))))
+    (should (equal set-params '((color-211-face . cj/ai-term-accent))))))
+
+(ert-deftest test-ai-term-apply-accent-multiple-indices ()
+  "Boundary: several indices each get their own palette-entry call."
+  (let ((set-params nil)
+        (cj/ai-term-accent-color-indices '(211 174)))
+    (cl-letf (((symbol-function 'eat-term-set-parameter)
+               (lambda (_terminal parameter value)
+                 (push (cons parameter value) set-params))))
+      (with-temp-buffer
+        (setq-local eat-terminal 'dummy-terminal)
+        (cj/--ai-term-apply-accent (current-buffer))))
+    (should (equal (sort (mapcar #'car set-params) #'string<)
+                   '(color-174-face color-211-face)))))
+
+(ert-deftest test-ai-term-apply-accent-no-terminal-is-noop ()
+  "Error: a buffer without a live eat terminal is left alone, no API call, no error."
+  (let ((set-params nil))
+    (cl-letf (((symbol-function 'eat-term-set-parameter)
+               (lambda (_terminal parameter value)
+                 (push (cons parameter value) set-params))))
+      (with-temp-buffer
+        (cj/--ai-term-apply-accent (current-buffer))))
+    (should-not set-params)))
+
+;;; ------------------------- show-or-create wiring ----------------------------
+
+(ert-deftest test-ai-term-show-or-create-applies-accent-on-create ()
+  "Normal: creating a fresh agent terminal applies the accent to its buffer."
+  (let ((name "agent [accent-wire-test]")
+        (cj/--ai-term-mru nil)
+        (applied nil))
+    (when (get-buffer name) (kill-buffer name))
+    (unwind-protect
+        (cl-letf (((symbol-function 'eat)
+                   (lambda (&optional _program _arg)
+                     (get-buffer-create eat-buffer-name)))
+                  ((symbol-function 'cj/--ai-term-send-string)
+                   (lambda (_buf _s) nil))
+                  ((symbol-function 'display-buffer)
+                   (lambda (&rest _) nil))
+                  ((symbol-function 'cj/--ai-term-apply-accent)
+                   (lambda (buffer) (push (buffer-name buffer) applied))))
+          (cj/--ai-term-show-or-create "/tmp/accent-wire-test" name)
+          (should (equal applied (list name))))
+      (when (get-buffer name) (kill-buffer name)))))
+
+(provide 'test-ai-term--accent)
+;;; test-ai-term--accent.el ends here