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chromium/third_party/blink/web_tests/external/wpt/html/semantics/embedded-content/the-img-element/image-loading-lazy-empty-src.html 

<!DOCTYPE html>
<html>
<title>Lazy loaded Images handle correctly when setting src to empty</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/images.html#update-the-image-data">
<div id=log></div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<img id="image" loading="lazy" src="resources/image.png">

<script>
  const image = document.querySelector('#image');

async_test(function(t) {
    image.onerror = t.step_func(function(e) {
        assert_equals(e.type, "error", "null image source check failed");
        image.onload = t.step_func(function() {
            t.done();
        });
        image.src = "resources/image.png";
    });
    image.src = "";
}, "lazy loaded image and empty src");

</script>