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213 lines
6.0 KiB
Racket
213 lines
6.0 KiB
Racket
#lang reader (submod "racket.rkt" reader)
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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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;describe 'Struct', ->
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; describe 'decode', ->
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; it 'should decode into an object', ->
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; stream = new DecodeStream new Buffer '\x05devon\x15'
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; struct = new Struct
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; name: new StringT uint8
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; age: uint8
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;
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; struct.decode(stream).should.deep.equal
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; name: 'devon'
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; age: 21
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(let ([stream (+DecodeStream (+Buffer "\x05devon\x15"))]
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[struct (+Struct (dictify 'name (+StringT uint8)
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'age uint8))])
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(check-equal? (dump (decode struct stream))
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(mhasheq 'name "devon" 'age 21)))
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;
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; it 'should support process hook', ->
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; stream = new DecodeStream new Buffer '\x05devon\x20'
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; struct = new Struct
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; name: new StringT uint8
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; age: uint8
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;
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; struct.process = ->
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; @canDrink = @age >= 21
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;
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; struct.decode(stream).should.deep.equal
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; name: 'devon'
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; age: 32
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; canDrink: true
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(let ([stream (+DecodeStream (+Buffer "\x05devon\x20"))]
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[struct (+Struct (dictify 'name (+StringT uint8)
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'age uint8))])
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(set-field! process struct (λ (o stream _) (ref-set! o 'canDrink (>= (· o age) 21)) o))
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(check-equal? (dump (decode struct stream))
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(mhasheq 'name "devon" 'age 32 'canDrink #t)))
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;
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; it 'should support function keys', ->
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; stream = new DecodeStream new Buffer '\x05devon\x20'
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; struct = new Struct
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; name: new StringT uint8
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; age: uint8
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; canDrink: -> @age >= 21
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;
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; struct.decode(stream).should.deep.equal
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; name: 'devon'
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; age: 32
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; canDrink: true
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(let ([stream (+DecodeStream (+Buffer "\x05devon\x20"))]
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[struct (+Struct (dictify 'name (+StringT uint8)
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'age uint8
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'canDrink (λ (o) (>= (ref o 'age) 21))))])
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(check-equal? (dump (decode struct stream))
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(mhasheq 'name "devon" 'age 32 'canDrink #t)))
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;
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; describe 'size', ->
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; it 'should compute the correct size', ->
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; struct = new Struct
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; name: new StringT uint8
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; age: uint8
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;
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; struct.size(name: 'devon', age: 21).should.equal 7
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(let ([struct (+Struct (dictify 'name (+StringT uint8)
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'age uint8))])
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(check-equal? (size struct (hasheq 'name "devon" 'age 32)) 7))
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; it 'should compute the correct size with pointers', ->
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; struct = new Struct
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; name: new StringT uint8
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; age: uint8
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; ptr: new Pointer uint8, new StringT uint8
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;
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; size = struct.size
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; name: 'devon'
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; age: 21
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; ptr: 'hello'
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;
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; size.should.equal 14
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(let ([struct (+Struct (dictify 'name (+StringT uint8)
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'age uint8
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'ptr (+Pointer uint8 (+StringT uint8))))])
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(check-equal? (size struct (mhash 'name "devon" 'age 21 'ptr "hello")) 14))
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;
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; it 'should get the correct size when no value is given', ->
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; struct = new Struct
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; name: new StringT 4
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; age: uint8
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;
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; struct.size().should.equal 5
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(let ([struct (+Struct (dictify 'name (+StringT 4)
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'age uint8))])
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(check-equal? (size struct) 5))
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;
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; it 'should throw when getting non-fixed length size and no value is given', ->
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; struct = new Struct
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; name: new StringT uint8
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; age: uint8
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;
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; should.throw ->
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; struct.size()
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; , /not a fixed size/i
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(let ([struct (+Struct (dictify 'name (+StringT uint8)
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'age uint8))])
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(check-exn exn:fail:contract? (λ () (size struct))))
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;
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; describe 'encode', ->
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; it 'should encode objects to buffers', (done) ->
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; stream = new EncodeStream
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; stream.pipe concat (buf) ->
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; buf.should.deep.equal new Buffer '\x05devon\x15'
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; done()
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;
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; struct = new Struct
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; name: new StringT uint8
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; age: uint8
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;
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; struct.encode stream,
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; name: 'devon'
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; age: 21
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;
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; stream.end()
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(let ([stream (+DecodeStream (+Buffer "\x05devon\x15"))]
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[struct (+Struct (dictify 'name (+StringT uint8)
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'age uint8))])
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(check-equal? (dump (decode struct stream))
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(mhasheq 'name "devon" 'age 21)))
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;
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; it 'should support preEncode hook', (done) ->
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; stream = new EncodeStream
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; stream.pipe concat (buf) ->
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; buf.should.deep.equal new Buffer '\x05devon\x15'
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; done()
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;
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; struct = new Struct
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; nameLength: uint8
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; name: new StringT 'nameLength'
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; age: uint8
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;
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; struct.preEncode = ->
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; @nameLength = @name.length
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;
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; struct.encode stream,
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; name: 'devon'
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; age: 21
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;
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; stream.end()
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(let ([stream (+EncodeStream)]
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[struct (+Struct (dictify 'nameLength uint8
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'name (+StringT 'nameLength)
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'age uint8))])
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(set-field! preEncode struct (λ (val stream) (ref-set! val 'nameLength (length (ref val 'name)))))
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(encode struct stream (mhasheq 'name "devon" 'age 21))
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(check-equal? (dump stream)
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(+Buffer "\x05devon\x15")))
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; it 'should encode pointer data after structure', (done) ->
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; stream = new EncodeStream
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; stream.pipe concat (buf) ->
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; buf.should.deep.equal new Buffer '\x05devon\x15\x08\x05hello'
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; done()
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;
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; struct = new Struct
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; name: new StringT uint8
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; age: uint8
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; ptr: new Pointer uint8, new StringT uint8
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;
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; struct.encode stream,
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; name: 'devon'
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; age: 21
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; ptr: 'hello'
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;
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; stream.end()
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(let ([stream (+EncodeStream)]
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[struct (+Struct (dictify 'name (+StringT uint8)
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'age uint8
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'ptr (+Pointer uint8 (+StringT uint8))))])
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(encode struct stream (mhasheq 'name "devon" 'age 21 'ptr "hello"))
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(check-equal? (dump stream) (+Buffer "\x05devon\x15\x08\x05hello"))) |