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tests: od: halve the invocations of od

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* tests/od/big-w.sh: Avoid rerunning the expensive
od invocations just to count bytes, instead using
tee to count the large output in parallel.
This commit is contained in:
Pádraig Brady
2026-09-15 17:32:19 +01:00
parent 98e9bed688
commit c445c7580c
1 changed files with 4 additions and 2 deletions
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6
tests/od/big-w.sh
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@@ -19,6 +19,7 @@
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ od
very_expensive_
require_bash_as_SHELL_ # for >()
export LC_ALL=C
@@ -29,12 +30,13 @@ EOF
# Try values near sqrt(2**31) and sqrt(2**63).
for w in 46340 46341 3037000500 3037000501; do
printf x | od -v -w$w -tcz 2>err | tr -s ' ' ' ' >out
printf x | od -v -w$w -tcz 2>err |
$SHELL -c 'tee >(wc -c >outbytes)' | tr -s ' ' ' ' >out
if test -s err; then
test ! -s out || fail=1
else
compare exp out || fail=1
outbytes=$(printf x | od -w$w -tcz | wc -c)
outbytes=$(cat outbytes) || framework_failure_
expbytes=$((4*$w + 21))
test $expbytes -eq $outbytes || fail=1
fi