<!DOCTYPE html>
<html>
<body>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
test(function() {
    assert_own_property(HTMLElement.prototype, "ontransitionend", "HTMLElement.prototype");
    assert_idl_attribute(document.createElement("div"), "ontransitionend", "div.ontransitionend");
}, "HTMLElement should have ontransitionend event handler.");

test(function() {
    assert_own_property(window, "ontransitionend", "window.ontransitionend");
}, "Window should have ontransitionend event handler.");

test(function() {
    const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
    assert_own_property(SVGElement.prototype, "ontransitionend", "SVGElement.prototype");
    assert_idl_attribute(svg, "ontransitionend", "svg.ontransitionend");
}, "SVGElement should have ontransitionend event handler.");

test(function() {
    assert_own_property(Document.prototype, "ontransitionend", "Document.prototype");
    assert_idl_attribute(document, "ontransitionend", "document.ontransitionend");
}, "Document should have ontransitionend event handler.");
</script>
</body>
</html>