tests: Add "tests/utils.scm"

* tests/utils.scm: New test.
* Makefile.am (TESTS): Add it.

tests/utils.scm

@@ -0,0 +1,51 @@
+;;;; utils.scm -- tests for (mcron utils) module
+;;; Copyright © 2018 Mathieu Lirzin <mthl@gnu.org>
+;;;
+;;; This file is part of GNU Mcron.
+;;;
+;;; GNU Mcron 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 Mcron 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 Mcron.  If not, see <http://www.gnu.org/licenses/>.
+
+(use-modules (srfi srfi-64)
+             (mcron utils))
+
+(test-begin "utils")
+
+(define entry
+  ;; Random user entry.
+  (getpw))
+
+;;; Call 'get-user' with a valid uid.
+(let ((uid (getuid)))
+  (test-equal "get-user: uid"
+    uid
+    (passwd:uid (get-user uid))))
+
+;;; Call 'get-user' with a valid user name.
+(let ((name (passwd:name entry)))
+  (test-equal "get-user: name"
+    name
+    (passwd:name (get-user name))))
+
+;;; Call 'get-user' with a passwd entry.
+(test-equal "get-user: passwd entry"
+  entry
+  (get-user entry))
+
+;;; Call 'get-user' with an invalid uid.
+(test-error "get-user: invalid uid" #t (get-user -20000))
+
+;;; Call 'get-user' with an invalid spec.
+(test-error "get-user: invalid spec" #t (get-user 'wrong))
+
+(test-end)