From f88f0e5d44f775708cd657c0eaf2a41369d6b03e Mon Sep 17 00:00:00 2001
From: Collin Funk <collin.funk1@gmail.com>
Date: Fri, 10 Oct 2025 21:13:55 -0700
Subject: [PATCH] tests: basenc: add a test for bounded memory operation

* tests/basenc/basenc-bounded-memory.sh: New file.
* tests/local.mk (all_tests): Add the test.
---
 tests/basenc/basenc-bounded-memory.sh | 39 +++++++++++++++++++++++++++
 tests/local.mk                        |  1 +
 2 files changed, 40 insertions(+)
 create mode 100755 tests/basenc/basenc-bounded-memory.sh

diff --git a/tests/basenc/basenc-bounded-memory.sh b/tests/basenc/basenc-bounded-memory.sh
new file mode 100755
index 0000000000..8ac2d1e1a2
--- /dev/null
+++ b/tests/basenc/basenc-bounded-memory.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+# Test that basenc can work on files larger than the systems memory.
+
+# Copyright (C) 2025 Free Software Foundation, Inc.
+
+# This program 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.
+
+# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ basenc
+
+vm=$(get_min_ulimit_v_ basenc /dev/null)
+
+# Check all except for --base58.
+for algorithm in '--base64' '--base64url' '--base32' '--base32hex' '--base16' \
+                 '--base2msbf' '--base2lsbf' '--z85'; do
+  timeout 0.5 $SHELL -c \
+    "(ulimit -v $(($vm+6000)) \
+      && basenc $algorithm </dev/zero >/dev/null 2>err)"
+  ret=$?
+  test -f err || skip_ 'shell ulimit failure'
+  test $ret = 124 || {
+    fail=1
+    cat err
+    echo "basenc $algorithm used too much memory" >&2
+  }
+done
+
+Exit $fail
diff --git a/tests/local.mk b/tests/local.mk
index 52184b7ac2..4c02cc65d7 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -298,6 +298,7 @@ all_tests =					\
   tests/misc/basename.pl			\
   tests/basenc/base64.pl			\
   tests/basenc/basenc.pl			\
+  tests/basenc/basenc-bounded-memory.sh		\
   tests/basenc/basenc-large.sh			\
   tests/misc/close-stdout.sh			\
   tests/chroot/chroot-fail.sh			\
-- 
2.47.3