+;; UPPER-CASE-P, LOWER-CASE-P, BOTH-CASE-P
+(test (upper-case-p #\A))
+(test (not (upper-case-p #\a)))
+(test (both-case-p #\a))
+(test (not (both-case-p #\5)))
+(test (not (lower-case-p #\5)))
+(test (not (upper-case-p #\5)))
+(test (not (upper-case-p (code-char 127744))))