HTML: form's _charset_ handling

tkent-google · annevk · commit c70b18e9e43e · 2018-04-27T10:22:28.000+02:00
HTML change: whatwg/html#3645. URL change: whatwg/url#382.
diff --git a/html/semantics/forms/form-submission-0/constructing-form-data-set.html b/html/semantics/forms/form-submission-0/constructing-form-data-set.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<head>
+<meta charset="utf-8">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#constructing-the-form-data-set">
+<link ref="help" href="https://xhr.spec.whatwg.org/#dom-formdata">
+<link rel="help" href="https://fetch.spec.whatwg.org/#concept-bodyinit-extract">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+
+<iframe name="frame1"></iframe>
+<form accept-charset="iso-8859-1" target="frame1" action="/common/blank.html">
+<input type="hidden" name="_charset_">
+</form>
+
+<script>
+test(() => {
+  let formData = new FormData(document.querySelector('form'));
+  assert_equals(formData.get('_charset_'), 'UTF-8');
+}, 'FormData constructor always produces UTF-8 _charset_ value.');
+
+let t = async_test('_charset_ control sets the expected encoding name.');
+t.step(() => {
+  let iframe = document.querySelector('iframe');
+  iframe.onload = t.step_func_done(() => {
+    assert_not_equals(iframe.contentDocument.URL.indexOf('_charset_=windows-1252'), -1);
+  });
+  document.querySelector('form').submit();
+});
+</script>
+</body>
