78 lines
2.4 KiB
Scheme
78 lines
2.4 KiB
Scheme
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(add-tests-with-string-output "eof-object"
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[(eof-object? (eof-object)) => "#t\n"]
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[(null? (eof-object)) => "#f\n"]
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[(boolean? (eof-object)) => "#f\n"]
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[(string? (eof-object)) => "#f\n"]
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[(char? (eof-object)) => "#f\n"]
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[(pair? (eof-object)) => "#f\n"]
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[(symbol? (eof-object)) => "#f\n"]
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[(procedure? (eof-object)) => "#f\n"]
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[(vector? (eof-object)) => "#f\n"]
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[(not (eof-object)) => "#f\n"]
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[(eof-object? #\a) => "#f\n"]
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[(eof-object? #t) => "#f\n"]
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[(eof-object? 12) => "#f\n"]
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[(eof-object? '(1 2 3)) => "#f\n"]
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[(eof-object? '()) => "#f\n"]
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[(eof-object? '#(foo)) => "#f\n"]
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[(eof-object? (lambda (x) x)) => "#f\n"]
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[(eof-object? 'baz) => "#f\n"]
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)
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(add-tests-with-string-output "read-char"
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[(begin
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(let ([p (open-output-file "stst.tmp" 'replace)])
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(display "Hello World!" p)
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(close-output-port p))
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(let ([p (open-input-file "stst.tmp")])
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(define loop
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(lambda ()
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(let ([x (read-char p)])
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(if (eof-object? x)
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(begin
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(close-input-port p)
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'())
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(begin
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(display x)
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(loop))))))
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(loop))
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(exit))
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=> "Hello World!"]
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[(let ([s (make-string 10000)]
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[t "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz12344567890<>,./?;:'\"[]{}\\|`~!@#$%^&*()-_=+"])
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(define fill-string!
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(lambda (i j)
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(unless (fx= i (string-length s))
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(if (fx>= j (string-length t))
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(fill-string! i (fx- j (string-length t)))
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(begin
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(string-set! s i (string-ref t j))
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(fill-string! (fxadd1 i) (fx+ j 17)))))))
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(define write-string!
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(lambda (i p)
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(cond
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[(fx= i (string-length s)) (close-output-port p)]
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[else
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(write-char (string-ref s i) p)
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(write-string! (fxadd1 i) p)])))
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(define verify
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(lambda (i p)
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(let ([x (read-char p)])
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(cond
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[(eof-object? x)
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(close-input-port p)
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(fx= i (string-length s))]
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[(fx= i (string-length s)) (error 'verify "file too short")]
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[(char= (string-ref s i) x)
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(verify (fxadd1 i) p)]
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[else (error 'verify "mismatch")]))))
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(fill-string! 0 0)
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(write-string! 0 (open-output-file "stst.tmp" 'replace))
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(verify 0 (open-input-file "stst.tmp"))) => "#t\n"]
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)
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