hub/tools/visualizer-test.js

// Checks the visualizer's pure logic and that it is wired into the pages (the pictures themselves are checked in a browser).
const fs = require('fs'), vm = require('vm'), assert = require('assert');
let n = 0; const ok = (c, m) => { assert(c, m); n++; };
const src = fs.readFileSync(__dirname + '/../public/visualizer.js', 'utf8');
new vm.Script(src); ok(true, 'parses');
const ctx = { window: {}, document: { createElement: () => ({ getContext: () => null }), addEventListener() {}, body: {} }, localStorage: { getItem: () => null, setItem() {} }, performance: { now: () => 0 }, requestAnimationFrame() {}, addEventListener() {}, navigator: {}, console };
vm.createContext(ctx); vm.runInContext(src + '\nthis.vizKind = vizKind; this.VIZ_MODES = VIZ_MODES;', ctx);
for (const k of ['pod:1', 'ab:2', 'lv:3', 'vbv:4']) ok(ctx.vizKind({ key: k }) === 'speech', k + ' is speech');
for (const k of ['12345', 'radio:journeyfm']) ok(ctx.vizKind({ key: k }) === 'music', k + ' is music');
ok(ctx.VIZ_MODES.length === 6 && ctx.VIZ_MODES[0][0] === 'classic', 'six looks, Classic first');
const root = __dirname + '/../public/', rd = f => fs.readFileSync(root + f, 'utf8');
ok(rd('index.html').includes('/visualizer.js'), 'script is loaded');
ok(rd('player.js').includes("id=\"npv\"") && rd('player.js').includes("id=\"cnv\""), 'buttons in the player and the Music card');
ok(rd('player.js').includes('vizTrackChanged') && rd('radio-view.js').includes('vizTrackChanged'), 'follows track changes');
console.log('visualizer: ' + n + ' checks passed');