script-sync-onerror-not-repeated.html

<!DOCTYPE html>
<html>
<head>
<script src="../../../resources/js-test.js"></script>
<script>
function loadScript(url, async, onload, onerror) {
    var script = document.createElement("script");
    script.async = async;
    script.onload = onload;
    if (onerror)
        script.onerror = onerror;
    script.src = url;
    document.head.appendChild(script);
}
</script>
</head>
<body>
<script>
description("Script that fails to load should not dispatch multiple error events");

window.jsTestIsAsync = true;

if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
}

var numberOfTimesOnErrorHandlerHasRun = 0;
function step2() {
    shouldBeZero("numberOfTimesOnErrorHandlerHasRun");
    numberOfTimesOnErrorHandlerHasRun++;
    // Issue another script load so as to have the script runner
    // revisit its script queue. It must not include the sync script
    // that triggered the dispatch of an error event and the running of
    // this handler.
    loadScript("resources/script-load.js", true, finishJSTest);
}

function unexpectedLoad() {
    testFailed("Script should not have loaded");
    finishJSTest();
}

loadScript("non-existing.js", false, unexpectedLoad, step2);
</script>
</body>
</html>

chromium/third_party/blink/web_tests/fast/dom/HTMLScriptElement/script-sync-onerror-not-repeated.html