Minilisp.pm/t/bool.t

;; Constants

(expect "True is true" (eq 1 (if t 1 0)))
(expect "False is false" (eq 1 (if nil 0 1)))

(expect "not f == t" (not nil))
(expect "not t == f" (eq 1 (if (not t) 0 1)))

;; operator and

(expect "and operator: t && t == t"
        (and t t))

(expect "and operator: t && f == f"
        (not (and t nil)))

(expect "and operator: f && t == f"
        (not (and nil t)))

(expect "and operator: f && f == f"
        (not (and nil nil)))

;; operator or
(expect "or operator: t || t == t"
        (or t t))

(expect "or operator: t || f == t"
        (or t nil))

(expect "or operator: f || t == t"
        (or nil t))

(expect "or operator: f || f == f"
        (not (or nil nil)))