Add some gnus-short-group-name tests

* test/lisp/gnus/gnus-group-tests.el (gnus-short-group-name): Add
some gnus-short-group-name tests (bug#51450).

diff --git a/test/lisp/gnus/gnus-group-tests.el b/test/lisp/gnus/gnus-group-tests.el
new file mode 100644 (file)
index 0000000..ee1e01b
--- /dev/null
+++ b/test/lisp/gnus/gnus-group-tests.el
@@ -0,0 +1,52 @@
+;;; gnus-group-tests.el --- Tests for gnus-group.el  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2021 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 'gnus-group)
+(require 'ert)
+
+(ert-deftest gnus-short-group-name ()
+  (map-apply
+   (lambda (input expected)
+     (should (string-equal (gnus-short-group-name input) expected)))
+   '(("nnimap+email@example.com:archives/2020/03" . "email@example:a/2/03")
+     ("nndiary+diary:birthdays" . "diary:birthdays")
+     ("nnimap+email@example.com:test" . "email@example:test")
+     ("nnimap+email@example.com:234" . "email@example:234")
+
+     ;; This is a very aggressive shortening of the left hand side.
+     ("nnimap+email@banana.salesman.example.com:234" . "email@banana:234")
+     ("nntp+some.where.edu:soc.motss" . "some:s.motss")
+     ("nntp+news.gmane.org:gmane.emacs.gnus.general" . "news:g.e.g.general")
+     ("nntp+news.gnus.org:gmane.text.docbook.apps" . "news:g.t.d.apps")
+
+     ;; nnimap groups.
+     ("nnimap+email@example.com:[Invoices]/Bananas" . "email@example:I/Bananas")
+     ("nnimap+email@banana.salesman.example.com:[Invoices]/Bananas"
+      . "email@banana:I/Bananas")
+
+     ;; The "n" from "nnspool" is perhaps not optimal.
+     ("nnspool+alt.binaries.pictures.furniture" . "n.b.p.furniture"))))
+
+;;; gnus-group-tests.el ends here