text-track-cue-exceptions.html | Explore in Territory

<!DOCTYPE html>
<title>TextTrackCue exceptions are properly messaged to developers</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
function getExceptionMsg(property) {
    return "Failed to set the '" + property
        + "' property on 'TextTrackCue': The provided double value is non-finite.";
}
var cue = new VTTCue(0, 0, "Test.");
function testProperty(property) {
    var expected_exception_msg = getExceptionMsg(property);
    test(function() {
        var testValues = [Number.NaN, Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY];
        testValues.forEach(function(value) {
            try {
                cue[property] = value;
                assert_unreached("should throw");
            } catch (e) {
                assert_equals(e.name, "TypeError");
                assert_equals(e.message, expected_exception_msg);
            }
        });
    }, expected_exception_msg);
}
testProperty("startTime");
testProperty("endTime");
</script>

chromium/third_party/blink/web_tests/media/track/text-track-cue-exceptions.html