[lang-ref] ( to_upper ) ( bash )

@test "to upper" {
	# "#{s^^}"
	s="abc"
	[ "${s^^}" == "ABC" ]
}

@test "to upper alternative" {
	# tr '[:lower:]' '[:upper:]'
	s="abc"
	r=$(printf "$s" | tr '[:lower:]' '[:upper:]')
	[ "$r" == "ABC" ]
}