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added error check to string

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svn: r7830
This commit is contained in:
Robby Findler 2007-11-25 14:42:04 +00:00
parent bd9dbe451b
commit aa266525dc
1 changed files with 1 additions and 1 deletions
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2
collects/htdp/image.ss
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@ -388,7 +388,7 @@ plt/collects/tests/mzscheme/image-test.ss
y2))))))
(define (text str size color-in)
(check 'text string? str "string" "first")
(check 'text (lambda (x) (and (string? x) (not (equal? "" x)))) str "non-empty string" "first")
(check 'text (lambda (x) (and (integer? x) (<= 1 x 255))) size "integer between 1 and 255" "second")
(check-image-color 'text color-in "third")
(let ([color (make-color% color-in)])