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https://git.sr.ht/~cismonx/bookmarkfs
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Tests that require PRNG are by default seeded from `/dev/urandom`. However, the user should be able to override with a given seed to reproduce a failing test. Instead of messing with command-line arguments, a cleaner approach is to fetch the seed from an environment variable.
46 lines
1.2 KiB
Text
46 lines
1.2 KiB
Text
dnl
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dnl Copyright (C) 2025 CismonX <admin@cismon.net>
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dnl
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dnl Copying and distribution of this file, with or without modification,
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dnl are permitted in any medium without royalty,
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dnl provided the copyright notice and this notice are preserved.
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dnl This file is offered as-is, without any warranty.
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dnl
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AT_SETUP([util lib: prng])
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AT_KEYWORDS([lib prng])
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# This test only serves as a basic sanity check.
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#
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# For reliable testing of PRNGs, see <https://prng.di.unimi.it/#quality>.
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ATX_CHECK_LIB([
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gen_num() {
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env BOOKMARKFS_TEST_PRNG_SEED=$1 check-util-lib prng -n$2
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}
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repeat=1
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if test -z "$BOOKMARKFS_TEST_PRNG_SEED"; then
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repeat=16
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fi
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ATX_RUN_REPEAT([$repeat], [
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seed=$(check-util-lib prng -n4 | tr -d '\n')
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count=32
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num_1=$(gen_num $seed $count)
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num_2=$(gen_num $seed $count)
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num_3=$(gen_num $seed $count)
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if test "$num_1" != "$num_2" -o "$num_2" != "$num_3"; then
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echo 'bad prng: inconsistent number sequence'
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exit 1
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fi
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uniq_count=$(echo "$num_1" | sort | uniq | wc -l)
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if test $uniq_count -ne $count; then
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echo 'bad prng: getting duplicates too soon'
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exit 1
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fi
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])
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])
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AT_CLEANUP
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