1 files changed, 46 insertions, 0 deletions
diff --git a/test/lisp/mwheel-tests.el b/test/lisp/mwheel-tests.el
new file mode 100644
index 00000000000..947dfdbb5e8
--- /dev/null
+++ b/test/lisp/mwheel-tests.el
@@ -0,0 +1,46 @@
+;;; mwheel-tests.el --- tests for mwheel.el  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2020-2022 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/>.
+
+;;; Code:
+
+(require 'ert)
+(require 'mwheel)
+
+(ert-deftest mwheel-test-enable/disable ()
+  (mouse-wheel-mode 1)
+  (should (eq (lookup-key (current-global-map) `[,mouse-wheel-up-event]) 'mwheel-scroll))
+  (mouse-wheel-mode -1)
+  (should (eq (lookup-key (current-global-map) `[,mouse-wheel-up-event]) nil)))
+
+(ert-deftest mwheel-test--create-scroll-keys ()
+  (should (equal (mouse-wheel--create-scroll-keys 10 'mouse-4)
+                 '([mouse-4]
+                   [left-margin mouse-4] [right-margin mouse-4]
+                   [left-fringe mouse-4] [right-fringe mouse-4]
+                   [vertical-scroll-bar mouse-4] [horizontal-scroll-bar mouse-4]
+                   [mode-line mouse-4] [header-line mouse-4])))
+  ;; Don't bind modifiers outside of buffer area (e.g. for fringes).
+  (should (equal (mouse-wheel--create-scroll-keys '((shift) . 1) 'mouse-4)
+                 '([(shift mouse-4)])))
+  (should (equal (mouse-wheel--create-scroll-keys '((control) . 9) 'mouse-7)
+                 '([(control mouse-7)])))
+  (should (equal (mouse-wheel--create-scroll-keys '((meta) . 5) 'mouse-5)
+                 '([(meta mouse-5)]))))
+
+;;; mwheel-tests.el ends here