@signalk/nmea0183-signalk/test/RMC.js

A node.js/javascript parser for NMEA0183 sentences. Sentences are parsed to Signal K format.

/**
 * Copyright 2016 Signal K and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict'

const Parser = require('../lib')
const chai = require('chai')

chai.Should()
chai.use(require('chai-things'))

describe('RMC', () => {
  it('Converts OK using individual parser', () => {
    const delta = new Parser().parse(
      '$GPRMC,085412.000,A,5222.3198,N,00454.5784,E,0.58,251.34,030414,,,A*65'
    )

    delta.updates[0].timestamp.should.equal('2014-04-03T08:54:12.000Z')
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.position'
    )
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.courseOverGroundTrue'
    )
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.speedOverGround'
    )
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.magneticVariation'
    )
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.magneticVariationAgeOfService'
    )
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.datetime'
    )
    delta.updates[0].values[0].value.latitude.should.be.closeTo(52.372, 0.005)
    delta.updates[0].values[0].value.longitude.should.be.closeTo(4.91, 0.005)
    delta.updates[0].values[5].value.should.equal('2014-04-03T08:54:12.000Z')
    delta.updates[0].values[1].value.should.be.closeTo(4.387, 0.005)
    delta.updates[0].values[2].value.should.be.closeTo(0.298, 0.005)
    chai.expect(delta.updates[0].values[3].value).to.be.a('null')
    delta.updates[0].values[4].value.should.equal(1396515252)
  })
  it('Converts OK using individual parser, w/ missing SOG/COG values', () => {
    const delta = new Parser().parse(
      '$GPRMC,085412.000,A,5222.3198,N,00454.5784,E,,,030414,12,E*42'
    )
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.speedOverGround'
    )
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.courseOverGroundTrue'
    )
    delta.updates[0].values.should.contain.an.item.with.property(
      'path',
      'navigation.magneticVariation'
    )
    chai.expect(delta.updates[0].values[1].value).to.be.a('null')
    chai.expect(delta.updates[0].values[2].value).to.be.a('null')
    delta.updates[0].values[3].value.should.be.closeTo(0.20944,.05)
  })
})