34 lines
1012 B
Scheme
34 lines
1012 B
Scheme
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(library (tests set-position)
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(export run-tests)
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(import (ikarus))
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(define fname "temp-test-file")
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(define (test-setting-position-for-binary-output-files)
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(let ([pos-list '([500 12] [720 34] [12 180] [400 4])])
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(when (file-exists? fname) (delete-file fname))
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(let ([p (open-file-output-port fname)])
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(for-each
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(lambda (x)
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(set-port-position! p (car x))
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(put-u8 p (cadr x)))
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pos-list)
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(close-output-port p))
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(let ([bv
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(let ([p (open-file-input-port fname)])
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(let ([bv (get-bytevector-all p)])
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(close-input-port p)
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bv))])
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(assert (= (bytevector-length bv)
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(add1 (apply max (map car pos-list)))))
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(for-each
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(lambda (x)
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(assert (= (bytevector-u8-ref bv (car x)) (cadr x))))
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pos-list))
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(delete-file fname)))
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(define (run-tests)
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(test-setting-position-for-binary-output-files)))
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