@csllc/j1939/test/offline/claim.test.js

J1939 transport layer for CANBUS communication

const J1939Mock = require('./bus-mock');
const sinon = require('sinon');
const J1939 = require('../..');
const expect = require('chai').expect;
const assert = require('chai').assert;

const MY_ADDR = 0xFE;

describe('Address Claim', function() {

  beforeEach(function() {
    this.remote = new J1939Mock({
      address: 1,
      name: [1, 0, 0, 0, 0, 0, 0, 0],
    });

    this.local = new J1939(this.remote.localBus(), {
      address: MY_ADDR,
      name: [1, 2, 3, 4, 5, 6, 7, 8],
    });

  });

  afterEach(function() {
    this.local.close();
    this.remote.close();
  });


  it('should claim an address if no response on the bus', function(done) {

    let me = this;
    var openSpy = sinon.spy();
    var addressSpy = sinon.spy();

    me.local.on('open', openSpy);
    me.local.on('address', addressSpy);

    setTimeout(function() {

      // after 1 sec, the open event should have been called exactly once
      // with my address

      expect(addressSpy.callCount).equals(2);
      expect(openSpy.callCount).to.equal(1);

      expect(addressSpy.getCall(0).args).to.eql([me.local.CLAIM_IN_PROGRESS, MY_ADDR]);
      expect(addressSpy.getCall(1).args).to.eql([me.local.CLAIM_SUCCESSFUL, MY_ADDR]);

      expect(openSpy.getCall(0).args[0]).to.equal(MY_ADDR);

      done();

    }, 1000);

    // opening the bus kicks off the address claim process
    this.remote.openBus();

  });

});