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test: avoid too-large number on 32-bit CS

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This commit is contained in:
Matthew Flatt 2020-06-29 13:15:24 -06:00
parent a0a0d2f883
commit 9e74f2d6c8
1 changed files with 14 additions and 10 deletions
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24
pkgs/racket-test-core/tests/racket/number.rktl
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@ -2915,16 +2915,20 @@
(test 121 integer-length (+ (expt 2 120) 1))
(define (avoid-big-allocation?)
;; A Raspberry Pi running Linux is a likely too-small device,
;; so at least detect that one:
(and (file-exists? "/proc/meminfo")
(call-with-input-file*
"/proc/meminfo"
(lambda (i)
(define m (regexp-match #rx"MemTotal: +([0-9]+) kB" i))
(and m
(< (string->number (bytes->string/utf-8 (cadr m)))
(* 1.5 1024 1024)))))))
(or
;; A Raspberry Pi running Linux is a likely too-small device,
;; so at least detect that one:
(and (file-exists? "/proc/meminfo")
(call-with-input-file*
"/proc/meminfo"
(lambda (i)
(define m (regexp-match #rx"MemTotal: +([0-9]+) kB" i))
(and m
(< (string->number (bytes->string/utf-8 (cadr m)))
(* 1.5 1024 1024))))))
;; If (sub1 (expt 2 31)) is a bignum, then `expt` will likely give
;; up
(not (fixnum? (sub1 (expt 2 31))))))
(unless (avoid-big-allocation?)
; don't attempt to print numbers that are billions of bits long