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83 lines
3.2 KiB
Racket
83 lines
3.2 KiB
Racket
#lang debug racket/base
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(require rackunit racket/dict
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racket/class
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"../helper.rkt"
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"../struct.rkt"
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"../string.rkt"
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"../pointer.rkt"
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"../number.rkt"
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"../generic.rkt"
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sugar/unstable/dict)
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#|
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approximates
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https://github.com/mbutterick/restructure/blob/master/test/Struct.coffee
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|#
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(test-case
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"decode into an object"
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(parameterize ([current-input-port (open-input-bytes #"\x05roxyb\x15")])
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(check-equal?
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(decode (+xstruct 'name (+xstring #:length uint8) 'age uint8))
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(mhasheq 'name "roxyb" 'age 21))))
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(test-case
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"decode with process hook"
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(parameterize ([current-input-port (open-input-bytes #"\x05roxyb\x20")])
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(define struct (+xstruct #:post-decode (λ (o) (dict-set! o 'canDrink (>= (dict-ref o 'age) 21)) o)
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'name (+xstring #:length uint8) 'age uint8))
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(check-equal? (decode struct)
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(mhasheq 'name "roxyb" 'age 32 'canDrink #t))))
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(test-case
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"decode supports function keys"
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(parameterize ([current-input-port (open-input-bytes #"\x05roxyb\x20")])
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(define struct (+xstruct 'name (+xstring #:length uint8) 'age uint8 'canDrink (λ (o) (>= (dict-ref o 'age) 21))))
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(check-equal? (decode struct)
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(mhasheq 'name "roxyb" 'age 32 'canDrink #t))))
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(test-case
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"compute the correct size"
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(check-equal? (size (+xstruct 'name (+xstring #:length uint8) 'age uint8)
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(hasheq 'name "roxyb" 'age 32)) 7))
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(test-case
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"compute the correct size with pointers"
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(check-equal? (size (+xstruct 'name (+xstring #:length uint8)
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'age uint8
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'ptr (+xpointer #:type (+xstring #:length uint8)))
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(mhash 'name "roxyb" 'age 21 'ptr "hello")) 14))
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(test-case
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"get the correct size when no value is given"
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(check-equal? (size (+xstruct 'name (+xstring 4) 'age uint8)) 5))
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(test-case
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"throw when getting non-fixed length size and no value is given"
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(check-exn exn:fail:contract? (λ () (size (+xstruct 'name (+xstring #:length uint8) 'age uint8)))))
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(test-case
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"encode objects to buffers"
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(parameterize ([current-input-port (open-input-bytes #"\x05roxyb\x15")])
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(check-equal? (decode (+xstruct 'name (+xstring #:length uint8) 'age uint8))
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(mhasheq 'name "roxyb" 'age 21))))
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(test-case
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"support pre-encode hook"
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(parameterize ([current-output-port (open-output-bytes)])
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(define struct (+xstruct #:pre-encode (λ (val)
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(dict-set! val 'nameLength (string-length (dict-ref val 'name))) val)
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'nameLength uint8
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'name (+xstring 'nameLength)
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'age uint8))
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(encode struct (mhasheq 'name "roxyb" 'age 21))
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(check-equal? (get-output-bytes (current-output-port)) #"\x05roxyb\x15")))
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(test-case
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"encode pointer data after structure"
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(parameterize ([current-output-port (open-output-bytes)])
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(define struct (+xstruct 'name (+xstring #:length uint8)
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'age uint8
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'ptr (+xpointer #:type (+xstring #:length uint8))))
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(encode struct (hasheq 'name "roxyb" 'age 21 'ptr "hello"))
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(check-equal? (get-output-bytes (current-output-port)) #"\x05roxyb\x15\x08\x05hello"))) |