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/* eslint-env node */
// NOTE: This file must parse as ES5, because the 'ecmascript examples' test below tries to// parse the file itself using our ES5 grammar.
/* eslint-disable no-var, prefer-arrow-callback, object-shorthand, ava/prefer-async-await */
'use strict';
// --------------------------------------------------------------------// Imports// --------------------------------------------------------------------
var test = require('ava');
var {exec} = require('child_process');var fs = require('fs');var jsdom = require('jsdom');var path = require('path');var walkSync = require('walk-sync');
// --------------------------------------------------------------------// Helpers// --------------------------------------------------------------------
var EXAMPLE_ROOT = path.normalize(path.join(__dirname, '../../../examples/'));
function runExampleAsync(relativePath) {  return new Promise(function(resolve, reject) {    runExample(relativePath, resolve);  });}
// Run the example at the given path (relative to `EXAMPLE_ROOT`), calling `cb` on completion.// The examples are loaded using JSDOM (https://github.com/tmpvar/jsdom), a JavaScript// implementation of the WHATWG DOM and HTML standards. Some things may behave slightly// differently than a real browser environment.function runExample(relativePath, cb) {  var errors = [];  jsdom.env({    file: path.join(EXAMPLE_ROOT, relativePath),    features: {      FetchExternalResources: ['script', 'img', 'css', 'frame', 'iframe', 'link'],
      // Block URLs that begin with HTTP. The examples should use only local resources,      // referenced by relative path.      SkipExternalResources: /^http/,    },    created: function(error, window) {      if (error) {        cb([error]);      } else {        jsdom.getVirtualConsole(window).sendTo(console);        window.addEventListener('error', function(evt) {          /* eslint-disable no-console */          console.error(              'In ' +              evt.filename +              '\n' +              'at line ' +              evt.lineno +              ' (relative to start of script), col ' +              evt.colno +              ':'          );          /* eslint-enable no-console */          errors.push(evt.error);        });      }    },    onload: function(window) {      // If the example specifies an inline test, run it.      if (window.test) window.test();      window.close();      cb(errors);    },  });}
// Executes `yarn build` if any of the files in src/ are older than the browserified bundle.function rebuildIfModified() {  // Get a sorted list of last-modified times for every file in the 'src' dir.  var srcEntries = walkSync.entries(path.join(__dirname, '../src'));  var mtimes = srcEntries.map(function(entry) {    return entry.mtime;  });  mtimes.sort(function(a, b) {    return a - b;  });
  var srcDate = new Date(mtimes.pop());  var bundleDate = fs.statSync(path.join(__dirname, '../dist/ohm.js')).mtime;
  if (bundleDate < srcDate) {    var p = exec('yarn build');    p.stdout.on('data', function() {      /* ignore */    });    p.stderr.pipe(process.stderr);  }}
// --------------------------------------------------------------------// Tests// --------------------------------------------------------------------
test('math example', function(t) {  rebuildIfModified();  return runExampleAsync('math/index.html').then(function(errors) {    t.deepEqual(errors, [], 'runs without errors');  });});
test('viz example', function(t) {  rebuildIfModified();  return runExampleAsync('viz/index.html').then(function(errors) {    t.deepEqual(errors, [], 'runs without errors');  });});
test('csv example', function(t) {  t.notThrows(function() {    require(path.join(EXAMPLE_ROOT, 'csv', 'index.js'));  });});