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diff --git a/test/lisp/net/browse-url-tests.el b/test/lisp/net/browse-url-tests.el
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+;;; browse-url-tests.el --- Tests for browse-url.el  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020-2022 Free Software Foundation, Inc.
+
+;; Author: Simen Heggestøyl <simenheg@gmail.com>
+;; Keywords:
+
+;; 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 'browse-url)
+(require 'ert)
+(require 'ert-x)
+
+(ert-deftest browse-url-tests-browser-kind ()
+  (should (eq (browse-url--browser-kind #'browse-url-emacs "gnu.org")
+              'internal))
+  (should
+   (eq (browse-url--browser-kind #'browse-url-firefox "gnu.org")
+       'external)))
+
+(ert-deftest browse-url-tests-non-html-file-url-p ()
+  (should (browse-url--non-html-file-url-p "file://foo.txt"))
+  (should-not (browse-url--non-html-file-url-p "file://foo.html")))
+
+(ert-deftest browse-url-tests-select-handler-mailto ()
+  (should (eq (browse-url-select-handler "mailto:foo@bar.org")
+              'browse-url--mailto))
+  (should (eq (browse-url-select-handler "mailto:foo@bar.org"
+                                         'internal)
+              'browse-url--mailto))
+  (should-not (browse-url-select-handler "mailto:foo@bar.org"
+                                         'external)))
+
+(ert-deftest browse-url-tests-select-handler-man ()
+  (should (eq (browse-url-select-handler "man:ls") 'browse-url--man))
+  (should (eq (browse-url-select-handler "man:ls" 'internal)
+              'browse-url--man))
+  (should-not (browse-url-select-handler "man:ls" 'external)))
+
+(ert-deftest browse-url-tests-select-handler-file ()
+  (should (eq (browse-url-select-handler "file://foo.txt")
+              'browse-url-emacs))
+  (should (eq (browse-url-select-handler "file://foo.txt" 'internal)
+              'browse-url-emacs))
+  (should-not (browse-url-select-handler "file://foo.txt" 'external)))
+
+(ert-deftest browse-url-tests-url-encode-chars ()
+  (should (equal (browse-url-url-encode-chars "foobar" "[ob]")
+                 "f%6F%6F%62ar")))
+
+(ert-deftest browse-url-tests-encode-url ()
+  (should (equal (browse-url-encode-url "") ""))
+  (should (equal (browse-url-encode-url "a b c") "a%20b%20c"))
+  (should (equal (browse-url-encode-url "\"a\" \"b\"")
+                 "%22a%22%20%22b%22"))
+  (should (equal (browse-url-encode-url "(a) (b)") "%28a%29%20%28b%29"))
+  (should (equal (browse-url-encode-url "a$ b$") "a$%20b$")))
+
+(ert-deftest browse-url-tests-url-at-point ()
+  (with-temp-buffer
+    (insert "gnu.org")
+    (should (equal (browse-url-url-at-point) "http://gnu.org"))))
+
+(ert-deftest browse-url-tests-file-url ()
+  (should (equal (browse-url-file-url "/foo") "file:///foo"))
+  (when (file-remote-p "/foo:")
+    (should (equal (browse-url-file-url "/foo:") "ftp://foo/")))
+  (when (file-remote-p "/ftp@foo:")
+    (should (equal (browse-url-file-url "/ftp@foo:") "ftp://foo/")))
+  (when (file-remote-p "/anonymous@foo:")
+    (should (equal (browse-url-file-url "/anonymous@foo:")
+                   "ftp://foo/"))))
+
+(ert-deftest browse-url-tests-delete-temp-file ()
+  (ert-with-temp-file browse-url-temp-file-name
+    (browse-url-delete-temp-file)
+    (should-not (file-exists-p browse-url-temp-file-name)))
+  (ert-with-temp-file file
+    (browse-url-delete-temp-file file)
+    (should-not (file-exists-p file))))
+
+(ert-deftest browse-url-tests-add-buttons ()
+  (with-temp-buffer
+    (insert "Visit https://gnu.org")
+    (goto-char (point-min))
+    (browse-url-add-buttons)
+    (goto-char (- (point-max) 1))
+    (should (eq (get-text-property (point) 'face)
+                'browse-url-button))
+    (should (get-text-property (point) 'browse-url-data))))
+
+(ert-deftest browse-url-tests-button-copy ()
+  (with-temp-buffer
+    (insert "Visit https://gnu.org")
+    (goto-char (point-min))
+    (browse-url-add-buttons)
+    (should-error (browse-url-button-copy))
+    (goto-char (- (point-max) 1))
+    (browse-url-button-copy)
+    (should (equal (car kill-ring) "https://gnu.org"))))
+
+(provide 'browse-url-tests)
+;;; browse-url-tests.el ends here