typesetting/pitfall/restructure/struct-test.rkt

#lang restructure/racket
(require "struct.rkt" "string.rkt" "number.rkt" "buffer.rkt" "stream.rkt" rackunit)

#|
approximates
https://github.com/mbutterick/restructure/blob/master/test/Struct.coffee
|#


;describe 'Struct', ->
;  describe 'decode', ->
;    it 'should decode into an object', ->
;      stream = new DecodeStream new Buffer '\x05devon\x15'
;      struct = new Struct
;        name: new StringT uint8
;        age: uint8
;
;      struct.decode(stream).should.deep.equal
;        name: 'devon'
;        age: 21

(let ([stream (+DecodeStream (+Buffer (bytes->list (bytes-append (bytes #x05) #"devon" (bytes #x15)))))]
      [struct (+Struct (dictify 'name (+StringT uint8)
                                'age uint8))])
  (check-equal? (send struct decode stream) (dictify 'name "devon"
                                                     'age 21)))


;
;    it 'should support process hook', ->
;      stream = new DecodeStream new Buffer '\x05devon\x20'
;      struct = new Struct
;        name: new StringT uint8
;        age: uint8
;
;      struct.process = ->
;        @canDrink = @age >= 21
;
;      struct.decode(stream).should.deep.equal
;        name: 'devon'
;        age: 32
;        canDrink: true
;
;    it 'should support function keys', ->
;      stream = new DecodeStream new Buffer '\x05devon\x20'
;      struct = new Struct
;        name: new StringT uint8
;        age: uint8
;        canDrink: -> @age >= 21
;
;      struct.decode(stream).should.deep.equal
;        name: 'devon'
;        age: 32
;        canDrink: true
;
;  describe 'size', ->
;    it 'should compute the correct size', ->
;      struct = new Struct
;        name: new StringT uint8
;        age: uint8
;
;      struct.size(name: 'devon', age: 21).should.equal 7
;
;    it 'should compute the correct size with pointers', ->
;      struct = new Struct
;        name: new StringT uint8
;        age: uint8
;        ptr: new Pointer uint8, new StringT uint8
;
;      size = struct.size
;        name: 'devon'
;        age: 21
;        ptr: 'hello'
;
;      size.should.equal 14
;      
;    it 'should get the correct size when no value is given', ->
;      struct = new Struct
;        name: new StringT 4
;        age: uint8
;
;      struct.size().should.equal 5
;      
;    it 'should throw when getting non-fixed length size and no value is given', ->
;      struct = new Struct
;        name: new StringT uint8
;        age: uint8
;
;      should.throw ->
;        struct.size()
;      , /not a fixed size/i
;      
;  describe 'encode', ->
;    it 'should encode objects to buffers', (done) ->
;      stream = new EncodeStream
;      stream.pipe concat (buf) ->
;        buf.should.deep.equal new Buffer '\x05devon\x15'
;        done()
;
;      struct = new Struct
;        name: new StringT uint8
;        age: uint8
;
;      struct.encode stream,
;        name: 'devon'
;        age: 21
;
;      stream.end()
;
;    it 'should support preEncode hook', (done) ->
;      stream = new EncodeStream
;      stream.pipe concat (buf) ->
;        buf.should.deep.equal new Buffer '\x05devon\x15'
;        done()
;
;      struct = new Struct
;        nameLength: uint8
;        name: new StringT 'nameLength'
;        age: uint8
;
;      struct.preEncode = ->
;        @nameLength = @name.length
;
;      struct.encode stream,
;        name: 'devon'
;        age: 21
;
;      stream.end()
;
;    it 'should encode pointer data after structure', (done) ->
;      stream = new EncodeStream
;      stream.pipe concat (buf) ->
;        buf.should.deep.equal new Buffer '\x05devon\x15\x08\x05hello'
;        done()
;
;      struct = new Struct
;        name: new StringT uint8
;        age: uint8
;        ptr: new Pointer uint8, new StringT uint8
;
;      struct.encode stream,
;        name: 'devon'
;        age: 21
;        ptr: 'hello'
;
;      stream.end()