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(string->number): New tests.

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This commit is contained in:
Kevin Ryde 2004-12-08 22:59:42 +00:00
parent 6255e812dc
commit fd4ba60be8
1 changed files with 26 additions and 0 deletions
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26
test-suite/tests/numbers.test
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@ -851,6 +851,32 @@
;;; string->number
;;;
(with-test-prefix "string->number"
(pass-if "documented?"
(documented? string->number))
;; Prior to Guile 1.6.7 the bignum size calculation (used for strings >=
;; 6 chars) was wrong (for bases other than 2, 10 and 16), resulting in
;; numerical overflow errors for certain conversions.
;;
;; The following exercises string->number of strings like "999999" (each
;; digit is base-1) in bases 2 to 16.
;;
(do ((base 2 (1+ base)))
((> base 16))
(with-test-prefix (list 'base base)
(do ((digit (string-ref (number->string (1- base) base) 0))
(want (1- base) (+ (* want base) base -1))
(len 1 (1+ len)))
((> len 300))
(pass-if (list 'length len)
(eqv? want (string->number (make-string len digit) base)))))))
;;;
;;; number?
;;;