servo/tests/wpt/web-platform-tests/FileAPI/blob/Blob-XHR-revoke.html

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<!doctype html>
<title>Revoking blob URL used with XMLHttpRequest</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async_test(function(t) {
var blob = new Blob(["test"]);
var url = URL.createObjectURL(blob);
var xhr = new XMLHttpRequest();
xhr.open("GET", url);
// Revoke the object URL. XHR should take a reference to the blob as soon as
// it receives it in open(), so the request succeeds even though we revoke the
// URL before calling send().
URL.revokeObjectURL(url);
xhr.send();
xhr.onload = t.step_func(function() {
assert_equals(xhr.response, "test");
t.done();
})
xhr.onerror = t.step_func(function() {
assert_unreached("Got unexpected error event");
})
});
</script>