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Belatedly test compute-range-index in isolation

This commit is contained in:
Tony Garnock-Jones 2014-12-23 11:47:53 -05:00
parent 695e8720db
commit 79e994ef9c
1 changed files with 9 additions and 5 deletions
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14
rmacs/rope.rkt
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@ -83,15 +83,15 @@
text
(substring text offset (+ offset count))))
(define (compute-index index default limit)
(define (compute-range-index index default limit)
(cond [(not index) default]
[(zero? limit) 0]
[else (max 0 (min limit (if (negative? index) (+ index limit) index)))]))
(define (substrand t0 [lo0 #f] [hi0 #f])
(define t (if (string? t0) (string->strand t0) t0))
(define lo (compute-index lo0 0 (strand-count t)))
(define hi (compute-index hi0 (strand-count t) (strand-count t)))
(define lo (compute-range-index lo0 0 (strand-count t)))
(define hi (compute-range-index hi0 (strand-count t) (strand-count t)))
(strand (strand-text t)
(+ (strand-offset t) lo)
(- hi lo)))
@ -396,8 +396,8 @@
(add-mark-to-table i mtype (+ pos offset) val)))
(define (subrope r0 [lo0 #f] [hi0 #f])
(define lo (compute-index lo0 0 (rope-size r0)))
(define hi (compute-index hi0 (rope-size r0) (rope-size r0)))
(define lo (compute-range-index lo0 0 (rope-size r0)))
(define hi (compute-range-index hi0 (rope-size r0) (rope-size r0)))
(define-values (_l mr) (rope-split r0 lo))
(define-values (m _r) (rope-split mr (- hi lo)))
m)
@ -526,4 +526,8 @@
(check-equal? (map rope->string
(call-with-values (lambda () (rope-split (string->rope "abc") 3)) list))
(list "abc" ""))
(check-equal? (map (lambda (i) (compute-range-index i 'default 10))
(list 0 10 3 -1 -2 11 12 -8 -9 -10 -11 -12))
(list 0 10 3 9 8 10 10 2 1 0 0 0))
)