[lang-ref] ( to_lower ) ( bash )

@test "to lower" {
	# "${s,,}"
	s="ABC"
	[ "${s,,}" == "abc" ]
}

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