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<!doctype html>
<html>
<head>
<meta charset="utf8">
<link rel="help" href="http://url.spec.whatwg.org/#dom-urlsearchparams-append">
<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();
params.append('a', 'b');
assert_equals(params + '', 'a=b');
params.append('a', 'b');
assert_equals(params + '', 'a=b&a=b');
params.append('a', 'c');
assert_equals(params + '', 'a=b&a=b&a=c');
}, 'Append same name');
test(function() {
var params = new URLSearchParams();
params.append('', '');
assert_equals(params + '', '=');
params.append('', '');
assert_equals(params + '', '=&=');
}, 'Append empty strings');
test(function() {
var params = new URLSearchParams();
params.append(null, null);
assert_equals(params + '', 'null=null');
params.append(null, null);
assert_equals(params + '', 'null=null&null=null');
}, 'Append null');
test(function() {
var params = new URLSearchParams();
params.append('first', 1);
params.append('second', 2);
params.append('third', '');
params.append('first', 10);
assert_true(params.has('first'), 'Search params object has name "first"');
assert_equals(params.get('first'), '1', 'Search params object has name "first" with value "1"');
assert_equals(params.get('second'), '2', 'Search params object has name "second" with value "2"');
assert_equals(params.get('third'), '', 'Search params object has name "third" with value ""');
params.append('first', 10);
assert_equals(params.get('first'), '1', 'Search params object has name "first" with value "1"');
}, 'Append multiple');
</script>
</head>
</html>
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