node-state-machine/test/Transition.js

State machine for NodeJS.

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

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

  it('should have correct checker', () => {
    let transition = new Transition(v => v == 'a', 'A');
    expect(transition.fires('a')).to.equal(true);
    expect(transition.fires('b')).to.equal(false);
    expect(transition.fires('')).to.equal(false);
    expect(transition.fires(false)).to.equal(false);
    expect(transition.fires(5)).to.equal(false);
  });

  it('should have correct destination', () => {
    let transition = new Transition(v => v == 'a', 'A');
    expect(transition.destination()).to.equal('A');
  });

  it('should have correct amount of middlewares', () => {
    let transition = new Transition(v => v == 'a', 'A', [
      v => { console.log(v); },
      v => { console.log('middleware'); },
    ]);
    expect(transition.hasMiddlewares()).to.equal(true);
    expect(transition.middlewares().length).to.equal(2);
  });

  it('should have no implicit middlewares', () => {
    let transition = new Transition(v => v == 'a', 'A');
    expect(transition.hasMiddlewares()).to.equal(false);
    expect(transition.middlewares().length).to.equal(0);
  });

  it('should have no explicit middlewares', () => {
    let transition = new Transition(v => v == 'a', 'A', []);
    expect(transition.hasMiddlewares()).to.equal(false);
    expect(transition.middlewares().length).to.equal(0);
  });

  it('should work with int destinations', () => {
    let transition = new Transition(v => v == 'a', 5);
    expect(transition.destination()).to.equal(5);
    expect(transition.destination()).to.not.equal('5');
  });

  it('should work with double destinations', () => {
    let transition = new Transition(v => v == 'a', 5.5);
    expect(transition.destination()).to.equal(5.5);
    expect(transition.destination()).to.not.equal('5.5');
  });

  it('should work with boolean destinations', () => {
    let transition = new Transition(v => v == 'a', true);
    expect(transition.destination()).to.equal(true);
    expect(transition.destination()).to.not.equal(false);
  });

  it('should work with int checker', () => {
    let transition = new Transition(v => v == 5, 5);
    expect(transition.fires('a')).to.equal(false);
    expect(transition.fires('b')).to.equal(false);
    expect(transition.fires('')).to.equal(false);
    expect(transition.fires(false)).to.equal(false);
    expect(transition.fires(5)).to.equal(true);
  });

  it('should work with boolean checker', () => {
    let transition = new Transition(v => v == true, true);
    expect(transition.fires('a')).to.equal(false);
    expect(transition.fires('b')).to.equal(false);
    expect(transition.fires('')).to.equal(false);
    expect(transition.fires(5)).to.equal(false);
    expect(transition.fires(true)).to.equal(true);
  });

});