post-multiple-items-multipart-form-data.html

<body onload="test()">
<form method="post" enctype="multipart/form-data" action="mailto:">
Field 1: <input type="text" size="10" maxlength="40" name="to" value="[email protected]">
Field 2: <textarea name="body">Line 1
Line 2
@&amp;=,;?"</textarea>
<input type="submit" value="Send"> 
</form>
<script>
function test() {
  if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitForPolicyDelegate();
    document.getElementsByTagName("form")[0].submit();
  }
}
</script>

chromium/third_party/blink/web_tests/fast/forms/mailto/post-multiple-items-multipart-form-data.html