guix: emacs-utils: Add emacs-batch-script.

* guix/build/emacs-utils.scm (emacs-batch-script): New procedure.

* tests/build-emacs-utils.scm: New file.

* Makefile.am (TESTS): Add `tests/build-emacs-utils.scm'.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/build-emacs-utils.scm b/tests/build-emacs-utils.scm
new file mode 100644
index 00000000000..27cff46c385
--- /dev/null
+++ b/tests/build-emacs-utils.scm
@@ -0,0 +1,43 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Fredrik Salomonsson <plattfot@posteo.net>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix 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 Guix 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 Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+
+(define-module (test build-emacs-utils)
+  #:use-module (guix tests)
+  #:use-module (guix build emacs-utils)
+  #:use-module (guix build utils)
+  #:use-module ((guix utils)
+                #:select (call-with-temporary-directory))
+  #:use-module (srfi srfi-34)
+  #:use-module (srfi srfi-64))
+
+(test-begin "build-emacs-utils")
+;; Only run the following tests if emacs is present.
+(test-skip (if (which "emacs") 0 2))
+
+(test-equal "emacs-batch-script: print foo from emacs"
+  "foo"
+  (emacs-batch-script '(princ "foo")))
+
+(test-assert "emacs-batch-script: raise &emacs-batch-error on failure"
+  (guard (c ((emacs-batch-error? c)
+             (string-contains (emacs-batch-error-message c)
+                              "Lisp error: (wrong-type-argument numberp \"three\")")))
+    (emacs-batch-script '(mapcar 'number-to-string (list 1 2 "three")))))
+
+(test-end "build-emacs-utils")