node/test/parallel/test-whatwg-url-searchparams.js

'use strict';

require('../common');
const assert = require('assert');
const URL = require('url').URL;

// Tests below are not from WPT.
const serialized = 'a=a&a=1&a=true&a=undefined&a=null&a=%5Bobject%20Object%5D';
const values = ['a', 1, true, undefined, null, {}];

const m = new URL('http://example.org');
const sp = m.searchParams;

assert(sp);
assert.strictEqual(sp.toString(), '');
assert.strictEqual(m.search, '');

assert(!sp.has('a'));
values.forEach((i) => sp.set('a', i));
assert(sp.has('a'));
assert.strictEqual(sp.get('a'), '[object Object]');
sp.delete('a');
assert(!sp.has('a'));

m.search = '';
assert.strictEqual(sp.toString(), '');

values.forEach((i) => sp.append('a', i));
assert(sp.has('a'));
assert.strictEqual(sp.getAll('a').length, 6);
assert.strictEqual(sp.get('a'), 'a');

assert.strictEqual(sp.toString(), serialized);

assert.strictEqual(m.search, `?${serialized}`);

assert.strictEqual(sp[Symbol.iterator], sp.entries);

let key, val, n = 0;
for ([key, val] of sp) {
  assert.strictEqual(key, 'a');
  assert.strictEqual(val, String(values[n++]));
}
n = 0;
for (key of sp.keys()) {
  assert.strictEqual(key, 'a');
}
n = 0;
for (val of sp.values()) {
  assert.strictEqual(val, String(values[n++]));
}
n = 0;
sp.forEach(function(val, key, obj) {
  assert.strictEqual(this, undefined);
  assert.strictEqual(key, 'a');
  assert.strictEqual(val, String(values[n++]));
  assert.strictEqual(obj, sp);
});
sp.forEach(function() {
  assert.strictEqual(this, m);
}, m);
assert.throws(() => sp.forEach(),
              /^TypeError: "callback" argument must be a function$/);
assert.throws(() => sp.forEach(1),
              /^TypeError: "callback" argument must be a function$/);

m.search = '?a=a&b=b';
assert.strictEqual(sp.toString(), 'a=a&b=b');