audiokeys/test/test.state.js

A utility for creating QWERTY keyboards with support for different monophonic and polyphonic behaviors.

var assert = require('assert');
var AudioKeys = require('../src/AudioKeys.js');

describe('State', function() {

  // ================================================================
  // DEFAULTS
  // ================================================================

  describe('defaults', function() {

    it('should have default polyphony of 4', function() {
      var keyboard = new AudioKeys();
      assert.equal(keyboard._state.polyphony, 4);
    });

    it('should have 1 default row', function() {
      var keyboard = new AudioKeys();
      assert.equal(keyboard._state.rows, 1);
    });

    it('should have a default priority of `last`', function() {
      var keyboard = new AudioKeys();
      assert.equal(keyboard._state.priority, 'last');
    });

    it('should have a default rootNote of 60', function() {
      var keyboard = new AudioKeys();
      assert.equal(keyboard._state.rootNote, 60);
    });

    it('should have octave controls by default', function() {
      var keyboard = new AudioKeys();
      assert.equal(keyboard._state.octaveControls, true);
    });

    it('should have velocity controls by default', function() {
      var keyboard = new AudioKeys();
      assert.equal(keyboard._state.velocityControls, true);
    });

  });

  // ================================================================
  // SETTING AND GETTING
  // ================================================================

  describe('setting and getting', function() {

    it('should be able to set all properties with `set(prop, value)`', function() {
      var keyboard = new AudioKeys();

      keyboard.set('polyphony', 1);
      assert.equal(keyboard._state.polyphony, 1);

      keyboard.set('rows', 2);
      assert.equal(keyboard._state.rows, 2);

      keyboard.set('octaveControls', false);
      assert.equal(keyboard._state.octaveControls, false);

      keyboard.set('velocityControls', false);
      assert.equal(keyboard._state.velocityControls, false);

      keyboard.set('priority', 'first');
      assert.equal(keyboard._state.priority, 'first');

      keyboard.set('rootNote', 48);
      assert.equal(keyboard._state.rootNote, 48);
    });

    it('should be able to set all properties with `set({ props })`', function() {
      var keyboard = new AudioKeys();

      keyboard.set({
        polyphony: 1,
        rows: 2,
        octaveControls: false,
        velocityControls: false,
        priority: 'first',
        rootNote: 48
      });

      assert.equal(keyboard._state.polyphony, 1);
      assert.equal(keyboard._state.rows, 2);
      assert.equal(keyboard._state.octaveControls, false);
      assert.equal(keyboard._state.velocityControls, false);
      assert.equal(keyboard._state.priority, 'first');
      assert.equal(keyboard._state.rootNote, 48);
    });

    it('should be able to get all properties', function() {
      var keyboard = new AudioKeys();

      assert.equal(keyboard.get('polyphony'), 4);
      assert.equal(keyboard.get('rows'), 1);
      assert.equal(keyboard.get('priority'), 'last');
      assert.equal(keyboard.get('rootNote'), 60);
      assert.equal(keyboard.get('octaveControls'), true);
      assert.equal(keyboard.get('velocityControls'), true);
      assert.equal(keyboard.get('octave'), 0);
      assert.equal(keyboard.get('velocity'), 127);
    });

    it('should accept an `options` object in the constructor', function() {
      var keyboard = new AudioKeys({
        polyphony: 1,
        rows: 2,
        octaveControls: false,
        priority: 'first',
        rootNote: 48
      });

      assert.equal(keyboard._state.polyphony, 1);
      assert.equal(keyboard._state.rows, 2);
      assert.equal(keyboard._state.octaveControls, false);
      assert.equal(keyboard._state.priority, 'first');
      assert.equal(keyboard._state.rootNote, 48);
    });
  });
});