#!/bin/sh

# Test that a PPM file with MAXVAL 1 generates an sBIT chunk.

PATH=${PWD%code*}code:$PATH

# macOS (and good POSIX principles) require that tr is invoked in POSIX locale.
export LC_ALL=C

printf 'P6 8 1 1\n\0\0\0\0\0\1\0\1\0\0\1\1\1\0\0\1\0\1\1\1\0\1\1\1\n' |
pripamtopng - | tr -dc a-zA-Z | grep -q sBIT