html5-boilerplate/test/file_content.mjs

import assert from 'assert';
import fs from 'fs';
import path from 'path';

import pkg from '../package.json';

const dirs = pkg['h5bp-configs'].directories;

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

function checkString(file, string, done) {

  let character = '';
  let matchFound = false;
  let matchedPositions = 0;
  const readStream = fs.createReadStream(file, {'encoding': 'utf8'});

  readStream.on('close', done);
  readStream.on('error', done);
  readStream.on('readable', function () {

    // Read file until the string is found
    // or the whole file has been read
    while (matchFound !== true &&
                (character = readStream.read(1)) !== null) {

      if (character === string.charAt(matchedPositions)) {
        matchedPositions += 1;
      } else {
        matchedPositions = 0;
      }

      if (matchedPositions === string.length) {
        matchFound = true;
      }

    }

    assert.equal(true, matchFound);
    this.close();

  });

}

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

function runTests() {

  const dir = dirs.dist;

  describe(`Test if the files from the "${dir}" directory have the expected content`, () => {

    it('"index.html" should contain the correct Modernizr version in the local URL', (done) => {
      const string = `js/vendor/modernizr-${pkg.devDependencies.modernizr}.min.js`;
      checkString(path.resolve(dir, 'index.html'), string, done);
    });

    it('"style.css" should contain a custom banner', function (done) {
      const string = `/*! HTML5 Boilerplate v${pkg.version} | ${pkg.license} License | ${pkg.homepage} */\n`;
      checkString(path.resolve(dir, 'css/style.css'), string, done);
    });

  });

}

runTests();