$ docker run --rm --name validator-libsodium-usage-ruby-rbnacl-util-zero-bin2hex-2732 -t --mount type=bind,src=/tmp/validator-status-libsodium-usage-ruby-rbnacl-util-zero-bin2hex,dst=/validator/status validator-libsodium-shared bash -lc 'set -euo pipefail
/validator/tests/_shared/install_override_debs.sh
exec /validator/tests/_shared/run_library_tests.sh "$@"' validator-testcase libsodium usage-ruby-rbnacl-util-zero-bin2hex -- bash -c 'PS4=$1; shift; set -x; source "$@"' validator-xtrace '__VALIDATOR_XTRACE__ ' /validator/tests/libsodium/tests/cases/usage/usage-ruby-rbnacl-util-zero-bin2hex.sh
no override packages found; continuing with apt originals
zeros = RbNaCl::Util.zeros(32)
raise "unexpected zeros length: #{zeros.bytesize}" unless zeros.bytesize == 32
raise "zeros buffer not all NUL"           unless zeros.bytes.all? { |b| b == 0 }
raise "zeros hex mismatch"                 unless RbNaCl::Util.bin2hex(zeros) == "00" * 32

fixed = (0..15).to_a.pack("C*").force_encoding(Encoding::BINARY)
hex   = RbNaCl::Util.bin2hex(fixed)
expected = "000102030405060708090a0b0c0d0e0f"
raise "bin2hex KAT mismatch: #{hex}" unless hex == expected

# 64-byte buffer should hex-encode to exactly 128 lowercase chars.
buf = RbNaCl::Util.zeros(64)
raise "long zeros hex length wrong"        unless RbNaCl::Util.bin2hex(buf).length == 128
puts hex
'
000102030405060708090a0b0c0d0e0f