causalityjs/test/postPulse.js

A library for reactive programming based on Javascript proxies.

'use strict';
require = require("esm")(module);
const causality = require("../causality.js");
const assert = require('assert');

describe("Post pulse", function(){

  const expected = [
    [ { type: 'create', object: {}, objectId: 1 } ],
    [ { type: 'create', object: {}, objectId: 2 } ],
    [ { type: 'set',
        property: 'y',
        newValue: {},
        oldValue: undefined,
        object: { y: {} },
        objectId: 1 } ],
    [ { type: 'set',
        property: 'foo',
        newValue: 42,
        oldValue: undefined,
        object: { y: null, foo: 42, z: {} },
        objectId: 1 },
      { type: 'set',
        property: 'bar',
        newValue: 2,
        oldValue: undefined,
        object: { bar: 2 },
        objectId: 2 },
      { type: 'create', object: {}, objectId: 3 },
      { type: 'set',
        property: 'z',
        newValue: {},
        oldValue: undefined,
        object: { y: null, foo: 42, z: {} },
        objectId: 1 } ],
  ];

  
  it("Test events", function(){
    let i = 0;
    causality.resetObjectIds();
    //console.log('setup');
		causality.setRecordEvents(true);
		causality.addPostPulseAction(function(events) {
      //console.log( events );
      assert.deepEqual( events, expected[i++] );
		});

    //console.log('start');
    let x = causality.create({});
		x.y = causality.create({});

    // Set up for comparison
    expected[3][0].object.y = x.y;
    expected[3][3].object.y = x.y;
    
    //console.log('transaction');
		causality.transaction(function() {
			x.foo = 42;
			x.y.bar = 2;
			x.z = causality.create({});
		});

    //console.log('cleanup');
    causality.removeAllPostPulseActions();
		causality.setRecordEvents(false);
    //console.log('end');
  });
});