href resolution test

assertions.js

const assertions = [
  // Preserves search string but strips hash
  // x -> { search: '?...', hash: '' }
  { href: '', location: '/path',               resolves_to: '/path' },
  { href: '', location: '/path/',              resolves_to: '/path/' },
  { href: '', location: '/path/#foo',          resolves_to: '/path/' },
  { href: '', location: '/path/?id=foo',       resolves_to: '/path/?id=foo' },
  { href: '', location: '/path/?id=foo#bar',   resolves_to: '/path/?id=foo' },
  
  // Strips search and hash strings
  // x -> { search: '', hash: '' }
  { href: '.', location: '/path',              resolves_to: '/' },
  { href: '.', location: `/path#foo`,          resolves_to: `/` },
  { href: '.', location: `/path?id=foo`,       resolves_to: `/` },
  { href: '.', location: `/path/`,             resolves_to: `/path/` },
  { href: '.', location: `/path/#foo`,         resolves_to: `/path/` },
  { href: '.', location: `/path/?id=foo`,      resolves_to: `/path/` },
  { href: '.', location: `/path/index.html`,   resolves_to: `/path/` },
  
  // Strips search parameters and hash string,
  // but preserves search delimeter (`?`)
  // x -> { search: '?', hash: '' }
  { href: '?', location: '/path',              resolves_to: '/path?' },
  { href: '?', location: '/path#foo',          resolves_to: '/path?' },
  { href: '?', location: '/path?id=foo',       resolves_to: '/path?' },
  { href: '?', location: '/path/',             resolves_to: '/path/?' },
  { href: '?', location: '/path/?id=foo#bar',  resolves_to: '/path/?' },
  { href: '?', location: '/index.html#foo',    resolves_to: '/index.html?'}
];

const assertions_evaluated = assertions.map(({ href, location, resolves_to }) => {
  const domain = 'https://example.com';
  const expected = new URL(href, domain + location).toString();
  const received = new URL(domain + resolves_to).toString();
  return {
    href,
    location,
    expected: expected.replace(domain, ''),
    received: received.replace(domain, ''),
    passed: expected === received
  };
});

console.table(assertions_evaluated);