starmatch.ts

// eslint-disable-next-line import/no-commonjs
var assert = require('assert');

function starRegex(pattern: string) {
  return RegExp(
    pattern
      .split('.')
      .map(x => {
        if (x === '**') return '[a-zA-Z\\.]*';
        if (x.includes('**'))
          throw `Double star wildcards can only occur between dots as in request.**.expect`;
        return x.replace('*', '[a-zA-Z]*');
      })
      .join('\\.'),
  );
}

export function starMatch(string: string, pattern: string): boolean;
export function starMatch(string: string, pattern: string[]): boolean;
export function starMatch(string: string, pattern: string | string[]): boolean {
  const patterns = Array.isArray(pattern) ? pattern : [pattern];
  for (const p of patterns) {
    if (starRegex(p).test(string)) return true;
  }
  return false;
}

const test: Array<[string, string, boolean]> = [
  ['request.get.post.expect', 'request.**.expect', true],
  ['request.get.post.expect', 'request.*.expect', false],
  ['request.get.expect', 'request.*.expect', true],
  ['request.get.expect', 'request.**.expect', true],
  ['request.get.expectSomething', 'request.**.expect*', true],
];

for (const [string, pattern, expectedResult] of test) {
  const result = starMatch(string, pattern);
  console.log({
    string,
    pattern,
    regex: starRegex(pattern),
    result,
  });
  assert(result === expectedResult);
}