chromium/third_party/blink/web_tests/fast/loader/navigation-scheduler-user-gesture.html

<!DOCTYPE html>
<html>
<script src="../../resources/testdriver.js"></script>
<script src="../../resources/testdriver-vendor.js"></script>
<body>
<p>
    Check that the NavigationScheduler correctly tracks user gestures.
</p>
<div id='log'></div>
<a href='about:blank' target='_blank'></a>
<button>click me</button>
<script>
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }

    function popup() {
        // Previously, this made the NavigationController create an additional
        // user gesture.
        window.open('javascript:', '_self', '');
        // Consume one gesture.
        window.open('about:blank').close();
        var w = window.open('about:blank');
        if (w == undefined)
            document.querySelector('#log').innerText = 'PASS: only one window opened';
        else
            document.querySelector('#log').innerText = 'FAIL: could open two windows';
        if (window.testRunner)
            testRunner.notifyDone();
    }

    var button = document.querySelector('button');
    button.onclick = popup;

    test_driver.click(button)
</script>
</body>
</html>