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<!doctype html>
<meta charset="utf-8">
<title>FormData: set (with form element)</title>
<link rel="help" href="https://xhr.spec.whatwg.org/#dom-formdata-set">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<form id="form"></form>
<script>
    test(function() {
        var fd = new FormData(document.getElementById("form"));
        fd.set('key', 'value1');
        assert_equals(fd.get('key'), "value1");
    }, 'testFormDataSetToForm1');
    test(function() {
        var fd = new FormData(document.getElementById("form"));
        fd.set('key', 'value2');
        fd.set('key', 'value1');
        assert_equals(fd.get('key'), "value1");
    }, 'testFormDataSetToForm2');
    test(function() {
        var fd = new FormData(document.getElementById("form"));
        fd.set('key', undefined);
        assert_equals(fd.get('key'), "undefined");
    }, 'testFormDataSetToFormUndefined1');
    test(function() {
        var fd = new FormData(document.getElementById("form"));
        fd.set('key', undefined);
        fd.set('key', 'value1');
        assert_equals(fd.get('key'), "value1");
    }, 'testFormDataSetToFormUndefined2');
    test(function() {
        var fd = new FormData(document.getElementById("form"));
        fd.set('key', null);
        assert_equals(fd.get('key'), "null");
    }, 'testFormDataSetToFormNull1');
    test(function() {
        var fd = new FormData(document.getElementById("form"));
        fd.set('key', null);
        fd.set('key', 'value1');
        assert_equals(fd.get('key'), "value1");
    }, 'testFormDataSetToFormNull2');
    test(function() {
        var fd = new FormData(document.getElementById("form"));
        assert_throws_js(TypeError, () => {fd.set('name', "string", 'filename')});
    }, 'testFormDataSetToFormString');
    test(function() {
        var fd = new FormData(document.getElementById("form"));
        assert_throws_js(TypeError, () => {fd.set('name', new URLSearchParams(), 'filename')});
    }, 'testFormDataSetToFormWrongPlatformObject');
</script>