Collin Funk <collin.fu...@gmail.com> writes:
> I have attached a patch to check for this condition.
Since it seems easy to overlook this in the future I have attached a
patch with the test case as well.
Collin
>From 94fcd58f38beec6e591a86b67a57729951eaf108 Mon Sep 17 00:00:00 2001
From: Collin Funk <collin.fu...@gmail.com>
Date: Thu, 20 Feb 2025 22:36:51 -0800
Subject: [PATCH] diff: add a test case for the recent empty file bug
* tests/empty-file: New file.
* tests/Makefile.am (TESTS): Add the test.
---
tests/Makefile.am | 1 +
tests/empty-file | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)
create mode 100755 tests/empty-file
diff --git a/tests/Makefile.am b/tests/Makefile.am
index adbb10d..806cd3c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -9,6 +9,7 @@ TESTS = \
cmp \
colliding-file-names \
diff3 \
+ empty-file \
excess-slash \
expand-tabs \
help-version \
diff --git a/tests/empty-file b/tests/empty-file
new file mode 100755
index 0000000..842a099
--- /dev/null
+++ b/tests/empty-file
@@ -0,0 +1,23 @@
+#!/bin/sh
+# Test empty files
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+mkdir a b
+touch a/test
+echo 'content' > b/test
+
+returns_ 1 diff -Naur a b >out || fail=1
+cat <<EOF > expected || framework_failure_
+diff -Naur a/test b/test
+--- a/test
++++ b/test
+@@ -0,0 +1 @@
++content
+EOF
+# Remove date and time.
+sed -e 's/^\([-+*][-+*][-+*] [^ ]*\) .*/\1/' out > k; mv k out
+compare expected out || fail=1
+
+Exit $fail
--
2.48.1
