abort-on-changestate-headers-received.html

<!DOCTYPE html>
<script src="/js-test-resources/gc.js"></script>
<script src="/js-test-resources/js-test.js"></script>
<script>
jsTestIsAsync = true;

var numberOfDocumentsBefore, numberOfDocumentsAfter;
function checkDocumentLeakAndFinishTest() {
    numberOfDocumentsAfter = internals.numberOfLiveDocuments();
    shouldBe("numberOfDocumentsAfter", "numberOfDocumentsBefore");
    finishJSTest();
}

function runTest() {
    numberOfDocumentsBefore = internals.numberOfLiveDocuments();

    var xhr = new XMLHttpRequest();
    xhr.responseType = 'document';
    xhr.overrideMimeType("text/html");
    xhr.onreadystatechange = function () {
        if (this.readyState == XMLHttpRequest.HEADERS_RECEIVED) {
            testPassed("this reached HEADERS_RECEIVED state.");
            this.abort();
            asyncGC(checkDocumentLeakAndFinishTest);
        } else if (this.readyState == XMLHttpRequest.LOADING) {
            testFailed("this reached LOADING state, but it should not reach here after abort().");
        } else if (this.readyState == XMLHttpRequest.DONE) {
            testPassed("this reached DONE state.");
        }
    }

    xhr.open("GET", "resources/get.txt", true);
    xhr.send(null);
    xhr = null;
}

// run GC before test to avoid document count being flaky.
asyncGC(runTest);
</script>

chromium/third_party/blink/web_tests/http/tests/xmlhttprequest/abort-on-changestate-headers-received.html