|  | <!doctype html> | 
|  | <html> | 
|  | <head> | 
|  | <meta charset="utf8"> | 
|  | <link rel="help" href="http://url.spec.whatwg.org/#dom-urlsearchparams-set"> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
|  | <script src="resources/testharness-extras.js"></script> | 
|  | <script> | 
|  | test(function() { | 
|  | var params = new URLSearchParams('a=b&c=d'); | 
|  | params.set('a', 'B'); | 
|  | assert_equals(params + '', 'a=B&c=d'); | 
|  | params = new URLSearchParams('a=b&c=d&a=e'); | 
|  | params.set('a', 'B'); | 
|  | assert_equals(params + '', 'a=B&c=d') | 
|  | params.set('e', 'f'); | 
|  | assert_equals(params + '', 'a=B&c=d&e=f') | 
|  | }, 'Set basics'); | 
|  |  | 
|  | test(function() { | 
|  | var params = new URLSearchParams('a=1&a=2&a=3'); | 
|  | assert_true(params.has('a'), 'Search params object has name "a"'); | 
|  | assert_equals(params.get('a'), '1', 'Search params object has name "a" with value "1"'); | 
|  | params.set('first', 4); | 
|  | assert_true(params.has('a'), 'Search params object has name "a"'); | 
|  | assert_equals(params.get('a'), '1', 'Search params object has name "a" with value "1"'); | 
|  | params.set('a', 4); | 
|  | assert_true(params.has('a'), 'Search params object has name "a"'); | 
|  | assert_equals(params.get('a'), '4', 'Search params object has name "a" with value "4"'); | 
|  | }, 'URLSearchParams.set'); | 
|  | </script> | 
|  | </head> | 
|  | </html> | 
|  |  |