#!/bin/sh
printf '1..10\n'

set -e

holes() { "${HOLES:-./holes}" "$@"; }

zeroes() { dd if=/dev/zero bs=${2:-1} count=$1 2>/dev/null; }
nonzeroes() { zeroes $1 $2 | tr '\0' x; }

check_output() {
	msg=$1
        expected="$(cat)"
        shift
        if output="$(eval "$@" 2>&1)"; then
                if [ "$output" = "$expected" ]; then
                        printf 'ok - %s\n' "$msg"
                        return
                fi
        fi
        printf 'not ok - %s\n' "$msg"
        if [ "$output" != "$expected" ]; then
                printf 'Unexpected output:\n%s\n' "$output" | sed 's/^/# /'
        fi
}

check_output 'no hole' 'echo foobar | holes' <<EOF
EOF

check_output 'big, no hole' 'nonzeroes 1 M | holes' <<EOF
EOF

check_output 'empty file' 'true | holes' <<EOF
00000000 0
EOF

check_output 'small holes' '{ nonzeroes 17; zeroes 35; nonzeroes 67; zeroes 67; } | holes -n1' <<EOF
00000011 35
00000077 67
EOF

check_output 'small, undetected holes' '{ nonzeroes 17; zeroes 35; nonzeroes 67; zeroes 63; } | holes' <<EOF
EOF

check_output 'medium holes' '{ zeroes 4 1k; nonzeroes 60 1k; zeroes 300 1k; nonzeroes 7 1k; } | holes' <<EOF
00000000 4096
00010000 307200
EOF

check_output 'medium, offsetted holes' '{ zeroes 4090; nonzeroes 60 1k; zeroes 307117; nonzeroes 7 1k; } | holes' <<EOF
00000000 4090
0000fffa 307117
EOF

check_output 'huge holes' '{ zeroes 5 M; nonzeroes 7 M; zeroes 7 M; } | holes' <<EOF
00000000 5242880
00c00000 7340032
EOF

check_output 'huge, offsetted holes' '{ nonzeroes 3636; zeroes 5 M; nonzeroes 7 M; zeroes 7 M; } | holes' <<EOF
00000e34 5242880
00c00e34 7340032
EOF

check_output 'detect non-zeroes' '{ nonzeroes 3636; zeroes 5 M; nonzeroes 7 M; zeroes 7 M; } | tr "\\0" "\\377" | holes -b 0xff' <<EOF
00000e34 5242880
00c00e34 7340032
EOF