From 98c539eeda8f9adfd22a3b2b6ece4fe1ca06b3b4 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Tue, 16 Apr 2024 11:52:44 -0400
Subject: tests: Quiet diff

On Solaris/Illumos, `diff` prints "No differences encountered" if the
files are the same.  Guard it with `cmp -s` so we get no output for
passing tests.
---
 tests/run.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'tests')

diff --git a/tests/run.sh b/tests/run.sh
index ab1ed6d..ad9c0be 100644
--- a/tests/run.sh
+++ b/tests/run.sh
@@ -430,7 +430,7 @@ make_xattrs() {
 EX_DIFF=20
 
 # Detect colored diff support
-if diff --color /dev/null /dev/null 2>/dev/null; then
+if diff --color /dev/null /dev/null &>/dev/null; then
     DIFF="diff --color"
 else
     DIFF="diff"
@@ -447,7 +447,7 @@ diff_output() {
 
     if ((UPDATE)); then
         cp "$OUT" "$GOLD"
-    else
+    elif ! cmp -s "$GOLD" "$OUT"; then
         $DIFF -u "$GOLD" "$OUT" >&$DUPERR
     fi
 }
-- 
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