File: test_image_clone_load.html

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<!DOCTYPE html>
<meta charset=utf-8>
<title>Test for image clones doing their load</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
var t = async_test("The clone of an image should do the load of the same image, and do it synchronously");
t.step(function() {
  var img = new Image();
  img.onload = t.step_func(function() {
    var clone = img.cloneNode();
    assert_not_equals(img.naturalWidth, 0, "Should have a width");
    assert_equals(clone.naturalWidth, img.naturalWidth,
                  "Clone should have a width too");
    // And make sure the clone fires onload too, which happens async.
    clone.onload = function() { t.done() }
  });
  img.src = "image.png";
});
</script>