--- /dev/null
+var fails = require('../internals/fails');
+var wellKnownSymbol = require('../internals/well-known-symbol');
+var IS_PURE = require('../internals/is-pure');
+
+var ITERATOR = wellKnownSymbol('iterator');
+
+module.exports = !fails(function () {
+ var url = new URL('b?a=1&b=2&c=3', 'http://a');
+ var searchParams = url.searchParams;
+ var result = '';
+ url.pathname = 'c%20d';
+ searchParams.forEach(function (value, key) {
+ searchParams['delete']('b');
+ result += key + value;
+ });
+ return (IS_PURE && !url.toJSON)
+ || !searchParams.sort
+ || url.href !== 'http://a/c%20d?a=1&c=3'
+ || searchParams.get('c') !== '3'
+ || String(new URLSearchParams('?a=1')) !== 'a=1'
+ || !searchParams[ITERATOR]
+ // throws in Edge
+ || new URL('https://a@b').username !== 'a'
+ || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'
+ // not punycoded in Edge
+ || new URL('http://тест').host !== 'xn--e1aybc'
+ // not escaped in Chrome 62-
+ || new URL('http://a#б').hash !== '#%D0%B1'
+ // fails in Chrome 66-
+ || result !== 'a1c3'
+ // throws in Safari
+ || new URL('http://x', undefined).host !== 'x';
+});