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diff --git a/tests/test-custom-text-enclose--enclose-region-or-word.el b/tests/test-custom-text-enclose--enclose-region-or-word.el
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+++ b/tests/test-custom-text-enclose--enclose-region-or-word.el
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+;;; test-custom-text-enclose--enclose-region-or-word.el --- Tests for the shared enclose dispatch -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; cj/--enclose-region-or-word is the dispatch+edit skeleton extracted from
+;; cj/surround/wrap/unwrap-word-or-region (region target, else word at point,
+;; else a no-target message).  The three commands stay covered by
+;; test-custom-text-enclose-public-wrappers.el; these cover the helper directly,
+;; including the custom and default no-target messages.
+
+;;; Code:
+
+(require 'ert)
+(require 'cl-lib)
+
+(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
+(require 'custom-text-enclose)
+
+(ert-deftest test-cte-enclose-region-target ()
+  "Normal: an active region is the target; TRANSFORM is applied to it."
+  (with-temp-buffer
+    (let ((transient-mark-mode t))
+      (insert "abc")
+      (goto-char (point-min))
+      (push-mark (point) t t)
+      (goto-char (point-max))
+      (cj/--enclose-region-or-word #'upcase))
+    (should (equal (buffer-string) "ABC"))
+    (should (= (point) 4))))            ; after the inserted "ABC" (start 1 + 3)
+
+(ert-deftest test-cte-enclose-word-at-point-target ()
+  "Normal: with no region, the word at point is the target."
+  (with-temp-buffer
+    (insert "foo bar")
+    (goto-char (point-min))            ; point on "foo"
+    (cj/--enclose-region-or-word (lambda (s) (concat "<" s ">")))
+    (should (equal (buffer-string) "<foo> bar"))))
+
+(ert-deftest test-cte-enclose-no-target-default-message ()
+  "Boundary: no region and no word => default message, buffer untouched."
+  (with-temp-buffer
+    (insert "   ")                     ; whitespace, no word
+    (goto-char (point-min))
+    (let ((msg nil))
+      (cl-letf (((symbol-function 'message)
+                 (lambda (fmt &rest args) (setq msg (apply #'format fmt args)))))
+        (cj/--enclose-region-or-word #'upcase))
+      (should (string-match-p "No word at point" msg))
+      (should (equal (buffer-string) "   ")))))
+
+(ert-deftest test-cte-enclose-no-target-custom-message ()
+  "Boundary: a supplied NO-TARGET-MESSAGE overrides the default."
+  (with-temp-buffer
+    (insert "   ")
+    (goto-char (point-min))
+    (let ((msg nil))
+      (cl-letf (((symbol-function 'message)
+                 (lambda (fmt &rest args) (setq msg (apply #'format fmt args)))))
+        (cj/--enclose-region-or-word #'upcase "custom no-target text"))
+      (should (equal msg "custom no-target text")))))
+
+(provide 'test-custom-text-enclose--enclose-region-or-word)
+;;; test-custom-text-enclose--enclose-region-or-word.el ends here