v/vlib/builtin/utf8_util_test.v

fn test_utf8_util() {
	src:="ăĂ ôÔ testo 怔"
	upper:=src.utf8_to_upper()
	lower:=src.utf8_to_lower()
	assert upper=="ĂĂ ÔÔ TESTO Æ€”"
	assert lower=="ăă ôô testo 怔"
}