cafe-grader-web Files · node_modules/restructure/test/LazyArray.coffee

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                    node_modules/restructure/test/LazyArray.coffee
                
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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()

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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()