#!/bin/sh

#
# This is a regression test for a crash seen in my development
# of performance code for Mosh, involving insert/delete line.
# It does insert/delete line from 0 to 2 more than the window height
# 24 in this test environment).
fail()
{
    printf "$@" 2>&1
    exit 99
}



PATH=$PATH:.:$srcdir
# Top-level wrapper.
if [ $# -eq 0 ]; then
    e2e-test $0 baseline
    exit
fi

# OK, we have arguments, we're one of the test hooks.
if [ $# -ne 1 ]; then
    fail "bad arguments %s\n" "$@"
fi

sleepf()
{
    (sleep .1 || sleep 1) > /dev/null 2>&1
}

seq()
{
    if [ $# -lt 1 -o $# -gt 3 ]; then
	echo "bad args" >&2
    fi
    first=$1
    incr=1
    last=0
    case $# in
	3)
	    incr=$2
	    last=$3
	    ;;
	2)
	    last=$2
	    ;;
	1)
	    ;;
    esac
    while :; do
	printf '%d\n' $first
	first=$(expr $first + $incr)
	if [ $first -gt $last ]; then
	    break
	fi
    done
}

baseline()
{
    printf '\033[H\033[J'
    for dir in L M; do
	for i in $(seq 0 2) $(seq 22 26); do
	    printf '%d\r' $i
	    printf '\033[%d%s' $i $dir
	    # On the one hand, we'd like to test that this works
	    # properly on both client and server, which requires
	    # delays so that each iteration percolates to the client
	    # by itself.  On the other hand, that makes the test take
	    # a long time.  Compromise on .1 second.
	    (sleep .1 || sleep 1) > /dev/null 2>&1
	done
    done
}

case $1 in
    baseline)
	baseline;;
    *)
	fail "unknown test argument %s\n" $1;;
esac