test_submit_euckr.html

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<!DOCTYPE html>

<html>

<head>

  <meta charset=utf-8>

  <title>Test for euc-kr encoded form submission</title>

  <script type="text/javascript" src="/resources/testharness.js"></script>

  <script type="text/javascript" src="/resources/testharnessreport.js"></script>

</head>

<body>

<div id="log"></div>

<iframe name="ifr"></iframe>

<form accept-charset="euc-kr" action="abc" target="ifr">

<input type="hidden" name="a" value="&#xAC02;">

</form>

<script>

async_test((t) => {

  const form = document.forms[0];

  const iframe = document.querySelector('iframe');

  // note: listener must be on the iframe, not the window that will be replaced

  iframe.onload = t.step_func_done(() =>

    assert_equals("".split.call(iframe.contentWindow.location, "?")[1], "a=%81A")

);

  form.submit();

}, "Test for euc-kr encoded form submission");

</script>

</body>

</html>