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114 lines
3.3 KiB
Racket
114 lines
3.3 KiB
Racket
#lang racket/base
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(require "racket.rkt")
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#|
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approximates
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https://github.com/mbutterick/restructure/blob/master/test/Optional.coffee
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|#
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;describe 'Optional', ->
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; describe 'decode', ->
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; it 'should not decode when condition is falsy', ->
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(parameterize ([current-input-port (open-input-bytes (bytes 0))])
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(define optional (+Optional uint8 #f))
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(check-equal? (decode optional) (void))
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(check-equal? (pos (current-input-port)) 0))
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; it 'should not decode when condition is a function and falsy', ->
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(parameterize ([current-input-port (open-input-bytes (bytes 0))])
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(define optional (+Optional uint8 (λ _ #f)))
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(check-equal? (decode optional) (void))
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(check-equal? (pos (current-input-port)) 0))
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; it 'should decode when condition is omitted', ->
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(parameterize ([current-input-port (open-input-bytes (bytes 0))])
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(define optional (+Optional uint8))
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(check-not-equal? (decode optional) (void))
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(check-equal? (pos (current-input-port)) 1))
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;
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; it 'should decode when condition is truthy', ->
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(parameterize ([current-input-port (open-input-bytes (bytes 0))])
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(define optional (+Optional uint8 #t))
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(check-not-equal? (decode optional) (void))
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(check-equal? (pos (current-input-port)) 1))
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; it 'should decode when condition is a function and truthy', ->
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(parameterize ([current-input-port (open-input-bytes (bytes 0))])
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(define optional (+Optional uint8 (λ _ #t)))
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(check-not-equal? (decode optional) (void))
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(check-equal? (pos (current-input-port)) 1))
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; describe 'size', ->
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(check-equal? (size (+Optional uint8 #f)) 0)
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;
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; it 'should return 0 when condition is a function and falsy', ->
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(check-equal? (size (+Optional uint8 (λ _ #f))) 0)
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; it 'should return given type size when condition is omitted', ->
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(check-equal? (size (+Optional uint8)) 1)
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; it 'should return given type size when condition is truthy', ->
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(check-equal? (size (+Optional uint8 #t)) 1)
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; it 'should return given type size when condition is a function and truthy', ->
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(check-equal? (size (+Optional uint8 (λ _ #t))) 1)
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; describe 'encode', ->
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; it 'should not encode when condition is falsy', (done) ->
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(parameterize ([current-output-port (open-output-bytes)])
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(define optional (+Optional uint8 #f))
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(encode optional 128)
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(check-equal? (dump (current-output-port)) (bytes)))
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; it 'should not encode when condition is a function and falsy', (done) ->
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(parameterize ([current-output-port (open-output-bytes)])
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(define optional (+Optional uint8 (λ _ #f)))
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(encode optional 128)
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(check-equal? (dump (current-output-port)) (bytes)))
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;
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; it 'should encode when condition is omitted', (done) ->
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(parameterize ([current-output-port (open-output-bytes)])
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(define optional (+Optional uint8))
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(encode optional 128)
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(check-equal? (dump (current-output-port)) (bytes 128)))
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; it 'should encode when condition is truthy', (done) ->
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(parameterize ([current-output-port (open-output-bytes)])
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(define optional (+Optional uint8 #t))
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(encode optional 128)
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(check-equal? (dump (current-output-port)) (bytes 128)))
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; it 'should encode when condition is a function and truthy', (done) ->
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(parameterize ([current-output-port (open-output-bytes)])
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(define optional (+Optional uint8 (λ _ #t)))
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(encode optional 128)
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(check-equal? (dump (current-output-port)) (bytes 128))) |