#!/bin/sh
nt_() {
	./nt "$@"
} >/dev/null


fail() {
	echo "$@"
	exit 1
} >&2


nt_ && fail "shall return non-zero exit code on no args"
nt_ 0 && fail "shall return non-zero exit code on just one arg"
nt_ 0 - && fail "shall return non-zero exit code on zero reps"
nt_ -1 - && fail "shall return non-zero exit code on negative reps"
nt_ abc - && fail "shall return non-zero exit code on invalid number"
nt_ 20 - || fail "shall return zero exit code with one component to repeat"
nt_ 10 - = + || fail "shall return zero exit code with more components"
echo ok