@graphistry/falcor/test/set/jsonGraphs/reference.spec.js

A JavaScript library for efficient data fetching.

var $ref = require('@graphistry/falcor-json-graph').ref;
var strip = require('../support/strip');
var $atom = require('@graphistry/falcor-json-graph').atom;
var $error = require('@graphistry/falcor-json-graph').error;
var $pathValue = require('@graphistry/falcor-json-graph').pathValue;
var $jsonGraph = require('../support/jsonGraph');
var $jsonGraphEnvelope = require('../support/jsonGraphEnvelope');

var expect = require('chai').expect;
var getModel = require('../support/getModel');
var setJSONGraphs = require('../../../lib/cache/set/setJSONGraphs');

describe('an old reference over a newer reference', function() {

    it('leaves the newer reference in place and short-circuit', function() {

        var startTime = Date.now();
        var lru = new Object();
        var cache = {};
        var version = 0;

        setJSONGraphs(
            getModel({ lru: lru, cache: cache, version: version++ }), [
            $jsonGraphEnvelope([
                $pathValue('grid', $ref('grids["id"]')),
                $pathValue('grids["id"][0]', $ref('lists["id"]')),
                $pathValue('lists["id"][0]', $ref('movies["pulp-fiction"]', {
                    $timestamp: startTime
                })),
                $pathValue('movies["pulp-fiction"].title', 'Pulp Fiction')
            ])]
        );

        setJSONGraphs(
            getModel({ lru: lru, cache: cache, version: version++ }), [{
                paths: [['grid', 0, 0, 'title']],
                jsonGraph: $jsonGraph([
                    $pathValue('lists["id"][0]', $ref('movies["kill-bill-1"]', {
                        $timestamp: startTime - 10
                    })),
                    $pathValue('movies["kill-bill-1"].title', 'Kill Bill')
                ])
            }]
        );

        expect(strip(cache)).to.deep.equal(strip({
            grid: $ref('grids["id"]'),
            grids: { id: { 0: $ref('lists["id"]') } },
            lists: { id: { 0: $ref('movies["pulp-fiction"]') } },
            movies: {
                "pulp-fiction": {
                    title: $atom('Pulp Fiction')
                }
            }
        }));
    });

    it('should correctly assign f_abs_path after setting past references', function() {

        var cache = {};
        var version = 0;

        setJSONGraphs(
            getModel({ cache: cache, version: version++ }), [{
                paths: [['genrelist', [0, 1], 'titles', 0, 'name']],
                jsonGraph: {
                    genrelist: {
                        0: { titles: { 0: $ref('titlesById[32]') } },
                        1: { titles: { 0: $ref('titlesById[87]') } }
                    }
                },
                titlesById: {
                    32: { name: 'Die Hard' },
                    87: { name: 'How to Lose a Guy in Ten Days' }
                }
            }]
        );

        expect(cache.genrelist[0][f_abs_path]).to.deep.equal(['genrelist', 0]);
        expect(cache.genrelist[1][f_abs_path]).to.deep.equal(['genrelist', 1]);
    });
});