utils: Return eof-object from read-bytes-till on end of file.

* email/utils.scm (read-bytes-till): Return eof-object, not #vu8(), on
end of file.
* tests/utils.scm: New file.
* Makefile.am (SCM_TESTS): Register it.

1 files changed, 33 insertions, 0 deletions

diff --git a/tests/utils.scm b/tests/utils.scm
new file mode 100644
index 0000000..f54cfdd
--- /dev/null
+++ b/tests/utils.scm
@@ -0,0 +1,33 @@
+;;; guile-email --- Guile email parser
+;;; Copyright © 2019 Arun Isaac <arunisaac@systemreboot.net>
+;;;
+;;; This file is part of guile-email.
+;;;
+;;; guile-email is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU Affero General Public License as
+;;; published by the Free Software Foundation; either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; guile-email 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
+;;; Affero General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Affero General Public
+;;; License along with guile-email.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+(use-modules (email utils)
+             (rnrs bytevectors)
+             (rnrs io ports)
+             (srfi srfi-26)
+             (srfi srfi-64))
+
+(test-begin "utils")
+
+(test-assert "read-bytes-till returns eof-object on end of file"
+  (eof-object?
+   (call-with-port (open-bytevector-input-port (make-bytevector 0))
+                   (cut read-bytes-till <> (make-bytevector 1)))))
+
+(test-end "utils")