--- /dev/null
+(require 'notmuch-mua)
+
+(defun attachment-check-test (&optional fn)
+ "Test `notmuch-mua-attachment-check' using a message where optional FN is evaluated.
+
+Return `t' if the message would be sent, otherwise `nil'"
+ (notmuch-mua-mail)
+ (message-goto-body)
+ (when fn
+ (funcall fn))
+ (prog1
+ (condition-case nil
+ ;; Force `y-or-n-p' to always return `nil', as if the user
+ ;; pressed "n".
+ (letf (((symbol-function 'y-or-n-p) (lambda (&rest args) nil)))
+ (notmuch-mua-attachment-check)
+ t)
+ ('error nil))
+ (set-buffer-modified-p nil)
+ (kill-buffer (current-buffer))))
+
+(defvar attachment-check-tests
+ '(
+ ;; These are all okay:
+ (t)
+ (t . (lambda () (insert "Nothing is a-tt-a-ch-ed!\n")))
+ (t . (lambda ()
+ (insert "Here is an attachment:\n")
+ (insert "<#part filename=\"foo\" />\n")))
+ (t . (lambda () (insert "<#part filename=\"foo\" />\n")))
+ (t . (lambda ()
+ ;; "attachment" is only mentioned in a quoted section.
+ (insert "> I sent you an attachment!\n")
+ ;; Code in `notmuch-mua-attachment-check' avoids matching on
+ ;; "attachment" in a quoted section of the message by looking at
+ ;; fontification properties. For fontification to happen we need to
+ ;; allow some time for redisplay.
+ (sit-for 0.01)))
+
+ ;; These should not be okay:
+ (nil . (lambda () (insert "Here is an attachment:\n")))
+ (nil . (lambda ()
+ ;; "attachment" is mentioned in both a quoted section and
+ ;; outside of it.
+ (insert "> I sent you an attachment!\n")
+ (insert "The attachment was missing!\n")
+ ;; Code in `notmuch-mua-attachment-check' avoids matching
+ ;; on "attachment" in a quoted section of the message by
+ ;; looking at fontification properties. For fontification
+ ;; to happen we need to allow some time for redisplay.
+ (sit-for 0.01)))
+ ))
+
+(defun notmuch-test-attachment-warning-1 ()
+ (let (output expected)
+ (mapcar (lambda (test)
+ (let* ((expect (car test))
+ (body (cdr test))
+ (result (attachment-check-test body)))
+ (push expect expected)
+ (push (if (eq result expect)
+ result
+ ;; In the case of a failure, include the test
+ ;; details to make it simpler to debug.
+ (format "%S <-- %S" result body))
+ output)))
+ attachment-check-tests)
+ (notmuch-test-expect-equal output expected)))