;;; Commentary:
;; Checks some prodecuders from (calp util)
;;; Code:

(((calp util) filter-sorted set/r!
  find-min find-max span-upto))

(test-equal "Filter sorted"
  '(3 4 5)
  (filter-sorted (lambda (x) (<= 3 x 5)) (iota 10)))

(test-equal "set/r! = single"
  #f
  (let ((x #t))
    (set/r! x = not)))

(test-error
 'syntax-error
 (test-read-eval-string "(set/r! x err not)"))


(call-with-values (lambda () (find-min (iota 10)))
  (lambda (extreme rest)
    (test-equal "Found correct minimum"
      0 extreme)
    (test-equal "Removed \"something\" from the set"
      9 (length rest))))


(call-with-values (lambda () (find-max '("Hello" "Test" "Something long") string-length))
  (lambda (extreme rest)
    (test-equal "Found the longest string" "Something long" extreme)
    (test-equal "Removed the string" 2 (length rest))
    (test-assert "Other members left 1" (member "Hello" rest))
    (test-assert "Other members left 2" (member "Test" rest))))


(test-error 'misc-error (find-extreme '()))

(call-with-values (lambda () (span-upto 2 char-numeric? (string->list "123456")))
  (lambda (head tail)
    (test-equal '(#\1 #\2) head)
    (test-equal '(#\3 #\4 #\5 #\6) tail)))

(call-with-values (lambda () (span-upto 2 char-numeric? (string->list "H123456")))
  (lambda (head tail)
    (test-equal '() head)
    (test-equal '(#\H #\1 #\2 #\3 #\4 #\5 #\6) tail)))