causalityjs/test/classes.js

A library for reactive programming based on Javascript proxies.

'use strict';
require = require("esm")(module);
const {create,repeatOnChange} = require("../causality.js");
const assert = require('assert');

describe("Classes", function () {

  class MyCausalityClass {
	  constructor( myid ){
		  this.propA = myid;
      this.propB = 0;
      return create( this );
    }

    dostuff()
    {
      return 33;
    }
  }
  
  let cnt = 0;
  const x = new MyCausalityClass( 11 );
  let z;

  repeatOnChange(function () {
    cnt++;
    z = x.propA + x.dostuff();
  });

  it('does action', function () {
    assert.equal(z, 44);
  });

  it('not trigger', function () {
    x.propC = 100;
    assert.equal(cnt, 1);
  });

  it('trigger', function () {
    x.propA = 2;
    assert.equal(z, 35);
  });

  it('changed method does not trigger', function(){
    MyCausalityClass.prototype.dostuff = function(){ return 11 };
    assert.equal(z, 35);
  });

  it('changed object functions do trigger', function(){
    x.dostuff = function(){ return 55 };
    assert.equal(z, 57);
  });


});