ng-bullet-migration-script.js

// to be run from current directory (e.g app/src/ )

const fs = require('fs');
const path = require('path');
const REGEX = /beforeEach\(async\((.+?)\)\.compileComponents\(\);\n\s+}\)\);$/gms;

function readDirR(dir) {
  return fs.statSync(dir).isDirectory()
    ? Array.prototype.concat(
        ...fs.readdirSync(dir).map(f => readDirR(path.join(dir, f))),
      )
    : dir;
}

readDirR(__dirname).forEach(filePath => {
  if (filePath.endsWith('spec.ts')) {
    fs.readFile(filePath, { encoding: 'utf-8' }, function(err, data) {
      if (!err && data.match(REGEX)) {
        data = data.replace(
          /import { async } from \'@angular\/core\/testing\';/gm,
          '',
        );
        // maybe there's a better way to do this but this works for now
        data = data.replace(/{\sasync,/gm, '{');
        data = data.replace(/,\sasync\s}/gm, '}');
        data = data.replace(/,\sasync\s?,/gm, ',');
        data = data.replace(/\sasync,\n/gm, '');
        data =
          `import { configureTestSuite } from 'ng-bullet';\n` +
          data.replace(REGEX, 'configureTestSuite($1)})');
        data = data.replace(
          /beforeEach\(async\((.+})\)\);$/gms,
          'beforeEach($1);',
        );

        fs.writeFile(filePath, data, function(err) {
          console.log(filePath, 'The file was saved!');
        });
      }
    });
  }
});