node-state-machine/test/Transitions.js

State machine for NodeJS.

import chai from 'chai';
import { Transition } from '../dist/model/Transition';
import { Transitions } from '../dist/model/Transitions';
let expect = chai.expect;

describe('Transitions Tests', () => {

  it('should have no transitions', () => {
    let transitions = new Transitions();
    expect(transitions.totalTransitions()).to.equal(0);
  });

  it('should have multiple transitions', () => {
    let t1 = new Transition(v => v == 'a', 'A');
    let t2 = new Transition(v => v == 'b', 'B');
    let t3 = new Transition(v => v == 'b', 'C');
    let transitions = new Transitions();
    expect(transitions.totalTransitions()).to.equal(0);
    transitions.add(t1);
    transitions.add(t2);
    transitions.add(t3);
    expect(transitions.totalTransitions()).to.equal(3);
    transitions.default('D');
    expect(transitions.totalTransitions()).to.equal(4);
    expect(() => { transitions.find('b'); }).to.throw('Multiple transitions found!');
  });

  it('should have return correct destination', () => {
    let t1 = new Transition(v => v == 'a', 'A');
    let t2 = new Transition(v => v == 'b', 'B');
    let t3 = new Transition(v => v == 'c', 'C');
    let transitions = new Transitions();
    expect(transitions.totalTransitions()).to.equal(0);
    transitions.add(t1);
    transitions.add(t2);
    transitions.add(t3);
    expect(transitions.totalTransitions()).to.equal(3);
    transitions.default('D');
    expect(transitions.totalTransitions()).to.equal(4);
    expect(transitions.find('a').destination()).to.equal('A');
    expect(transitions.find('b').destination()).to.equal('B');
    expect(transitions.find('c').destination()).to.equal('C');
    expect(transitions.find('d').destination()).to.equal('D');
  });

});