firmata-electron/test/onewireutils.test.js

A library to control an arduino running firmata

var should = require("should"),
  OneWireUtils = require("../lib/onewireutils");
var Encoder7Bit = require("../lib/encoder7bit.js");
describe("board", function () {
  it("should CRC check data read from firmata", function (done) {
    var input = [0x28, 0xDB, 0xEF, 0x21, 0x05, 0x00, 0x00, 0x5D];
    var crcByte = OneWireUtils.crc8(input.slice(0, input.length - 1));

    crcByte.should.equal(input[input.length - 1]);

    done();
  });
  it("should return an invalid CRC check for corrupt data", function (done) {
    var input = [0x28, 0xDB, 0xEF, 0x22, 0x05, 0x00, 0x00, 0x5D];
    var crcByte = OneWireUtils.crc8(input.slice(0, input.length - 1));

    crcByte.should.not.equal(input[input.length - 1]);

    done();
  });
  it("should read device identifier", function (done) {
    var input = Encoder7Bit.to7BitArray([0x28, 0xDB, 0xEF, 0x21, 0x05, 0x00, 0x00, 0x5D]);
    var devices = OneWireUtils.readDevices(input);

    devices.length.should.equal(1);

    done();
  });
  it("should read device identifiers", function (done) {
    var input = Encoder7Bit.to7BitArray([0x28, 0xDB, 0xEF, 0x21, 0x05, 0x00, 0x00, 0x5D, 0x28, 0xDB, 0xEF, 0x21, 0x05, 0x00, 0x00, 0x5D]);
    var devices = OneWireUtils.readDevices(input);

    devices.length.should.equal(2);

    done();
  });
  it("should read only complete device identifiers", function (done) {
    var input = Encoder7Bit.to7BitArray([0x28, 0xDB, 0xEF, 0x21, 0x05, 0x00, 0x00, 0x5D, 0x28, 0xDB, 0xEF, 0x21, 0x05, 0x00, 0x00, 0x5D, 0x00, 0x01, 0x02]);
    var devices = OneWireUtils.readDevices(input);

    devices.length.should.equal(2);

    done();
  });
});