LayoutTests/http/tests/security/credentials-from-different-domains.html

<script>

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

var request1 = new XMLHttpRequest();
request1.onreadystatechange = function () {
    if (request1.readyState === 4){
        alert("Verifying credentials are used when given: " + request1.responseText);

        // Verify that credentials are preemptively sent to the same realm, even when not explicitly given.
        var request2 = new XMLHttpRequest();
        request2.onreadystatechange = function () {
            if (request2.readyState === 4){
                alert("Verifying credentials are preemptively set when they have been given: " + request2.responseText);

                // Open the rest of the test in the same domain and verify that the credentials are used.
                window.open('http://127.0.0.1:8000/security/resources/credentials-from-different-domains-continued-1.html');
            }
        }
        request2.open('GET', 'http://127.0.0.1:8000/security/resources/cors-basic-auth.py');
        request2.send();
    }
};
request1.open('GET', 'http://127.0.0.1:8000/security/resources/cors-basic-auth.py', true, "user", "pass");
request1.send();
</script>