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chromium/third_party/blink/web_tests/media/video-volume.html 

<!DOCTYPE html>
<title>Test "volume" attribute.</title>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<video></video>
<script>
async_test(function(t) {
    var video = document.querySelector("video");
    assert_equals(video.volume, 1.0);
    video.volume = 0.5;
    assert_equals(video.volume, 0.5);
    video.volume = Number.MIN_VALUE;
    assert_equals(video.volume, Number.MIN_VALUE);
    video.volume = 0;
    assert_equals(video.volume, 0);
    assert_throws_dom("IndexSizeError", function() { video.volume = 1.5; });
    assert_throws_dom("IndexSizeError", function() { video.volume = -0.5; });
    assert_throws_js(TypeError, function() { video.volume = -Infinity; });
    assert_throws_js(TypeError, function() { video.volume = Infinity; });
    assert_throws_js(TypeError, function() { video.volume = NaN; });

    video.oncanplaythrough = t.step_func_done(function() {
        assert_equals(video.volume, 0);
        video.volume = 0.5;
        assert_equals(video.volume, 0.5);
        assert_throws_dom("IndexSizeError", function() { video.volume = 1.5; });
        assert_throws_dom("IndexSizeError", function() { video.volume = -0.5; });
    });

    video.src = "content/test.ogv";
});
</script>