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node_modules/restructure/test/Struct.coffee | 134 lines | 3.3 KiB | text/coffeescript | CoffeeScriptLexer |
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{Struct, String:StringT, Pointer, uint8, DecodeStream, EncodeStream} = require '../'
should = require('chai').should()
concat = require 'concat-stream'
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
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()