chromium/third_party/blink/web_tests/fast/dom/HTMLImageElement/image-src-added-srcset-w-descriptors.html

<!DOCTYPE html>
<script src="../../../resources/js-test.js"></script>
<img id="our_image" src="resources/blue_rect.jpg">
<script>
var jsTestIsAsync = true;
var img;

onload = function() {

    img = document.getElementById("our_image");
    shouldNotBe('img.currentSrc.indexOf("blue_rect.jpg")', '-1');
    img.onload = function() {
        shouldNotBe('img.currentSrc.indexOf("image-set-4x")', '-1');
        finishJSTest();
    }
    img.srcset = "resources/image-set-4x.png 120w";

    img.onerror = function() {
        testFailed('Image should have loaded');
    };
}
</script>