bleadvertise/test/parser-spec.js

Parse and generate Bluetooth Low Energy peripheral advertising packets

// Copyright 2014 Technical Machine, Inc. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

var expect = require('chai').expect;
var parser = require('../');

describe("Parser", function() {

  var testPayload = new Buffer([27, 2, 1, 6, 17, 6, 186, 86, 137, 166, 250, 191, 162, 189, 1, 70, 125, 110, 56, 88, 171, 173, 5, 22, 10, 24, 7, 4]);

  describe("#split()", function() {
    it("should split up an advertisement packet into distinct data formats", function() {
      expect(parser.split(testPayload).length).to.equal(3);
    });
  });

  describe("#parse()", function() {
    it ("should create the correct number of packets", function() {
        var parsed = parser.parse(testPayload);
        expect(parsed.length).to.equal(3);
    });
    it("should properly parse a payload into the correct kinds of data", function() {
        var parsed = parser.parse(testPayload);
        parsed.forEach(function(packet) {
          expect(packet.type).to.not.equal("Unknown");
          expect(packet.byteOrder).to.not.equal(undefined);
        });
        
        expect(parsed[0].type).to.equal("Flags");
        expect(parsed[0].data.length).to.equal(2);

        expect(parsed[1].type).to.equal('Incomplete List of 128-bit Service Class UUIDs');
        expect(parsed[1].data.length).to.equal(1);

        expect(parsed[2].type).to.equal('Service Data');
        expect(parsed[2].data.length).to.equal(4);
        expect(parsed[1].data[0]).to.equal('adab58386e7d4601bda2bffaa68956ba');
    });

    it("should be able to switch byte order of bytes based on endian-ness", function() {
      var newPayload = new Buffer([ 7, 2, 1, 6, 3, 2, 160, 255 ]);
      var parsed = parser.parseLE(newPayload);
      expect(parsed[1].data[0]).to.equal('a0ff');

      var parsed = parser.parseBE(newPayload);
      expect(parsed[1].data[0]).to.equal('ffa0');

    });
  });
});