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<!DOCTYPE html>
<html>
<head>
<title>XMLHttpRequest: getResponseHeader() in unsent, opened states</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" href="https://xhr.spec.whatwg.org/#dom-xmlhttprequest-getresponseheader" data-tested-assertations="/following::OL[1]/LI[1]" />
</head>
<body>
<div id="log"></div>
<script>
var test = async_test()
test.step(function() {
var client = new XMLHttpRequest()
assert_equals(client.getResponseHeader("x-custom-header"), null)
client.onreadystatechange = function() {
test.step(function() {
if(client.readyState < 2) {
assert_equals(client.getResponseHeader("x-custom-header"), null)
assert_equals(client.getResponseHeader("CONTENT-TYPE"), null)
test.done()
}
})
}
client.open("GET", "resources/headers.py")
assert_equals(client.getResponseHeader("x-custom-header"), null)
assert_equals(client.getResponseHeader("Date"), null)
client.send(null)
})
</script>
</body>
</html>
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