#!/bin/sh

#
# This is a regression test to ensure that Mosh does not spin
# on updates that do not actually change the framebuffer.
#

# shellcheck source=e2e-test-subrs
. "$(dirname "$0")/e2e-test-subrs"
PATH=$PATH:.:$srcdir
# Top-level wrapper.
if [ $# -eq 0 ]; then
    e2e-test "$0" baseline post
    exit
fi

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

baseline()
{
    # Generate updates that don't change the screen
    i=0
    while [ $i -lt 10 ] && printf 'x\b' && sleep 1; do
	i=$((i + 1))
    done
}

post()
{
    # Extract server run time.
    runtime=$(sed -E -n 's/.*@@@ runtime: (.*) @@@.*/\1/p' "$(basename "$0").d/baseline.tmux.log")

    # If this system can't actually report runtime, bail.
    if [ -z "$runtime" ] || [ "$runtime" -eq "-" ]; then
	exit 0
    fi

    # If we ran for more than one second, fail.
    seconds=${runtime##*:}
    bigger=${runtime%:*}
    onesec=$(echo "$seconds >= 1" | bc)
    if [ "$onesec" -eq 1 ] || [ "$bigger" -ne 0 ]; then
	exit 1
    fi
    exit 0
}

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