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node_modules/restructure/test/LazyArray.coffee | 65 lines | 2.0 KiB | text/coffeescript | CoffeeScriptLexer |
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{LazyArray, Pointer, uint8, uint16, DecodeStream, EncodeStream} = require '../'
should = require('chai').should()
concat = require 'concat-stream'
describe 'LazyArray', ->
describe 'decode', ->
it 'should decode items lazily', ->
stream = new DecodeStream new Buffer [1, 2, 3, 4, 5]
array = new LazyArray uint8, 4
arr = array.decode(stream)
arr.should.not.be.an.instanceof Array
arr.should.have.length 4
stream.pos.should.equal 4
arr.get(0).should.equal 1
arr.get(1).should.equal 2
arr.get(2).should.equal 3
arr.get(3).should.equal 4
should.not.exist arr.get(-1)
should.not.exist arr.get(5)
it 'should be able to convert to an array', ->
stream = new DecodeStream new Buffer [1, 2, 3, 4, 5]
array = new LazyArray uint8, 4
arr = array.decode(stream)
arr.toArray().should.deep.equal [1, 2, 3, 4]
it 'should have an inspect method', ->
stream = new DecodeStream new Buffer [1, 2, 3, 4, 5]
array = new LazyArray uint8, 4
arr = array.decode(stream)
arr.inspect().should.equal '[ 1, 2, 3, 4 ]'
it 'should decode length as number before array', ->
stream = new DecodeStream new Buffer [4, 1, 2, 3, 4, 5]
array = new LazyArray uint8, uint8
arr = array.decode(stream)
arr.toArray().should.deep.equal [1, 2, 3, 4]
describe 'size', ->
it 'should work with LazyArrays', ->
stream = new DecodeStream new Buffer [1, 2, 3, 4, 5]
array = new LazyArray uint8, 4
arr = array.decode(stream)
array.size(arr).should.equal 4
describe 'encode', ->
it 'should work with LazyArrays', (done) ->
stream = new DecodeStream new Buffer [1, 2, 3, 4, 5]
array = new LazyArray uint8, 4
arr = array.decode(stream)
enc = new EncodeStream
enc.pipe concat (buf) ->
buf.should.deep.equal new Buffer [1, 2, 3, 4]
done()
array.encode(enc, arr)
enc.end()