chromium/third_party/blink/web_tests/fast/forms/number/number-input-changeevent.html

<!DOCTYPE html>
<html>
<body>
<p>This test ensures change event is fired for input[type=number] when the user reverts the change made by a script.</p>
<div id="console"></div>
<div><input id="test" type="number" onchange="numberOfChangeEventsFired++;"><input id="dummy"></div>
<script src="../../../resources/js-test.js"></script>
<script>

if (window.testRunner)
    testRunner.dumpAsText();

var numberOfChangeEventsFired = 0;
var test = document.getElementById('test');
var dummy = document.getElementById('dummy');
test.focus();

if (window.eventSender) {
    shouldBe("eventSender.keyDown('1');eventSender.keyDown('2');dummy.focus();numberOfChangeEventsFired", '1');
    shouldBe("test.value = '34';numberOfChangeEventsFired", '1');
    shouldBe("test.focus();test.value = '34';document.execCommand('SelectAll');\n"
    + "eventSender.keyDown('1');eventSender.keyDown('2');dummy.focus();numberOfChangeEventsFired", '2');
    test.parentNode.style.display = 'none';
}

</script>
</body>
</html>