johnny-five/test/distance.js

The JavaScript Arduino Programming Framework.

var MockFirmata = require("./mock-firmata"),
  five = require("../lib/johnny-five.js"),
  events = require("events"),
  sinon = require("sinon"),
  Board = five.Board,
  Sensor = five.Sensor,
  Distance = five.IR.Distance,
  board = new Board({
    io: new MockFirmata(),
    debug: false,
    repl: false
  });

exports["IR.Distance"] = {
  setUp: function(done) {
    this.clock = sinon.useFakeTimers();
    this.analogRead = sinon.spy(board.io, "analogRead");
    this.distance = new Distance({
      pin: "A1",
      board: board
    });

    this.instance = [{
      name: "inches"
    }, {
      name: "cm"
    }];

    done();
  },

  tearDown: function(done) {
    this.clock.restore();
    this.analogRead.restore();
    done();
  },

  shape: function(test) {
    test.expect(this.instance.length);

    this.instance.forEach(function(property) {
      test.notEqual(typeof this.distance[property.name], "undefined");
    }, this);

    test.done();
  },

  sensor: function(test) {
    test.expect(1);
    test.ok(this.distance instanceof Sensor);
    test.done();
  },

  emitter: function(test) {
    test.expect(1);
    test.ok(this.distance instanceof events.EventEmitter);
    test.done();
  }
};

exports["IR.Distance: GP2Y0A21YK"] = {
  setUp: function(done) {
    this.clock = sinon.useFakeTimers();
    this.analogRead = sinon.spy(board.io, "analogRead");
    this.distance = new Distance({
      device: "GP2Y0A21YK",
      pin: "A1",
      board: board
    });

    done();
  },

  tearDown: function(done) {
    this.clock.restore();
    this.analogRead.restore();
    done();
  },

  GP2Y0A21YK: function(test) {
    var callback = this.analogRead.args[0][1];

    test.expect(2);

    // 154 is an actual reading at ~14.5"
    callback(154);

    test.equals(Math.round(this.distance.cm), 38);
    test.equals(Math.round(this.distance.inches), 15);

    test.done();
  }
};

exports["IR.Distance: GP2D120XJ00F"] = {
  setUp: function(done) {
    this.clock = sinon.useFakeTimers();
    this.analogRead = sinon.spy(board.io, "analogRead");
    this.distance = new Distance({
      device: "GP2D120XJ00F",
      pin: "A1",
      board: board
    });

    done();
  },

  tearDown: function(done) {
    this.clock.restore();
    this.analogRead.restore();
    done();
  },

  GP2D120XJ00F: function(test) {
    var callback = this.analogRead.args[0][1];

    test.expect(2);
    // 70 is an actual reading at ~14.5"
    callback(70);

    test.equals(Math.round(this.distance.cm), 38);
    test.equals(Math.round(this.distance.inches), 15);

    test.done();
  }
};

exports["IR.Distance: GP2Y0A02YK0F"] = {
  setUp: function(done) {
    this.clock = sinon.useFakeTimers();
    this.analogRead = sinon.spy(board.io, "analogRead");
    this.distance = new Distance({
      device: "GP2Y0A02YK0F",
      pin: "A1",
      board: board
    });

    done();
  },

  tearDown: function(done) {
    this.clock.restore();
    this.analogRead.restore();
    done();
  },

  GP2Y0A02YK0F: function(test) {
    var callback = this.analogRead.args[0][1];

    test.expect(2);

    // 325 is an actual reading at ~14.5"
    callback(325);

    test.equals(Math.round(this.distance.cm), 38);
    test.equals(Math.round(this.distance.inches), 15);

    test.done();
  }
};


// - GP2Y0A21YK
//     https://www.sparkfun.com/products/242
// - GP2D120XJ00F
//     https://www.sparkfun.com/products/8959
// - GP2Y0A02YK0F
//     https://www.sparkfun.com/products/8958