3 files changed, 150 insertions, 0 deletions
diff --git a/test/lisp/mail/qp-tests.el b/test/lisp/mail/qp-tests.el
new file mode 100644
index 00000000000..8d704499334
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+++ b/test/lisp/mail/qp-tests.el
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+;;; qp-tests.el --- Tests for qp.el  -*- lexical-binding:t; coding:utf-8 -*-
+
+;; Copyright (C) 2020 Free Software Foundation, Inc.
+
+;; Author: Stefan Kangas <stefankangas@gmail.com>
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ert)
+(require 'qp)
+
+;; Quote by Antoine de Saint-Exupéry, Citadelle (1948)
+;; from https://en.wikipedia.org/wiki/Quoted-printable
+(defvar qp-tests-quote-qp
+  (concat "J'interdis aux marchands de vanter trop leurs marchandises. Car ils se font =\n"
+          "vite p=C3=A9dagogues et t'enseignent comme but ce qui n'est par essence qu'=\n"
+          "un moyen, et te trompant ainsi sur la route =C3=A0 suivre les voil=C3=A0 bi=\n"
+          "ent=C3=B4t qui te d=C3=A9gradent, car si leur musique est vulgaire ils te f=\n"
+          "abriquent pour te la vendre une =C3=A2me vulgaire."))
+(defvar qp-tests-quote-utf8
+  (concat "J'interdis aux marchands de vanter trop leurs marchandises. Car ils se font "
+          "vite pédagogues et t'enseignent comme but ce qui n'est par essence qu'"
+          "un moyen, et te trompant ainsi sur la route à suivre les voilà bi"
+          "entôt qui te dégradent, car si leur musique est vulgaire ils te f"
+          "abriquent pour te la vendre une âme vulgaire."))
+
+(ert-deftest qp-test--quoted-printable-decode-region ()
+  (with-temp-buffer
+    (insert qp-tests-quote-qp)
+    (encode-coding-region (point-min) (point-max) 'utf-8)
+    (quoted-printable-decode-region (point-min) (point-max) 'utf-8)
+    (should (equal (buffer-string) qp-tests-quote-utf8))))
+
+(ert-deftest qp-test--quoted-printable-decode-string ()
+  (should (equal (quoted-printable-decode-string "foo!") "foo!"))
+    (should (equal (quoted-printable-decode-string "=0C") "\^L"))
+  (should (equal (quoted-printable-decode-string "=3D") "="))
+  (should (equal (quoted-printable-decode-string "=A1Hola, se=F1or!?")
+                 "\241Hola, se\361or!?")))
+
+(ert-deftest qp-test--quoted-printable-encode-region ()
+  (with-temp-buffer
+    (insert (make-string 26 ?=))
+    ;; (encode-coding-region (point-min) (point-max) 'utf-8)
+    (quoted-printable-encode-region (point-min) (point-max) t)
+    (should (equal (buffer-string)
+                   (concat "=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D"
+                           "=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=\n=3D")))))
+
+(ert-deftest qp-test--quoted-printable-encode-string ()
+  (should (equal (quoted-printable-encode-string "\241Hola, se\361or!?")
+                 "=A1Hola, se=F1or!?"))
+  ;; Multibyte character.
+  (should-error (quoted-printable-encode-string "å")))
+
+(provide 'qp-tests)
+;;; qp-tests.el ends here
diff --git a/test/lisp/mail/rfc2045-tests.el b/test/lisp/mail/rfc2045-tests.el
new file mode 100644
index 00000000000..edd7a88c69e
--- /dev/null
+++ b/test/lisp/mail/rfc2045-tests.el
@@ -0,0 +1,37 @@
+;;; rfc2045-tests.el --- Tests for rfc2045.el  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2020 Free Software Foundation, Inc.
+
+;; Author: Stefan Kangas <stefankangas@gmail.com>
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ert)
+(require 'rfc2045)
+
+(ert-deftest rfc2045-test-encode-string ()
+  (should (equal (rfc2045-encode-string "foo" "bar") "foo=bar"))
+  (should (equal (rfc2045-encode-string "foo" "bar-baz") "foo=bar-baz"))
+  (should (equal (rfc2045-encode-string "foo" "bar baz") "foo=\"bar baz\""))
+  (should (equal (rfc2045-encode-string "foo" "bar\tbaz") "foo=\"bar\tbaz\""))
+  (should (equal (rfc2045-encode-string "foo" "bar\nbaz") "foo=\"bar\nbaz\"")))
+
+(provide 'rfc2045-tests)
+;;; rfc2045-tests.el ends here
diff --git a/test/lisp/mail/rfc2368-tests.el b/test/lisp/mail/rfc2368-tests.el
new file mode 100644
index 00000000000..c35b8e33ad5
--- /dev/null
+++ b/test/lisp/mail/rfc2368-tests.el
@@ -0,0 +1,39 @@
+;;; rfc2368-tests.el --- Tests for rfc2368.el  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2020 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ert)
+(require 'rfc2368)
+
+(ert-deftest rfc2368-unhexify-string ()
+  (should (equal (rfc2368-unhexify-string "hello%20there") "hello there")))
+
+(ert-deftest rfc2368-parse-mailto-url ()
+  (should (equal (rfc2368-parse-mailto-url "mailto:foo@example.org?subject=Foo&bar=baz")
+                 '(("To" . "foo@example.org") ("Subject" . "Foo") ("Bar" . "baz"))))
+  (should (equal (rfc2368-parse-mailto-url "mailto:foo@bar.com?to=bar@example.org")
+                 '(("To" . "foo@bar.com, bar@example.org"))))
+  (should (equal (rfc2368-parse-mailto-url "mailto:foo@bar.com?subject=bar%20baz")
+                 '(("To" . "foo@bar.com") ("Subject" . "bar baz")))))
+
+(provide 'rfc2368-tests)
+;;; rfc2368-tests.el ends here