gecko-dev/netwerk/test/unit/test_bug510359.js

const {HttpServer} = ChromeUtils.import("resource://testing-common/httpd.js");

var httpserver = new HttpServer();
var index = 0;
var tests = [
    { url : "/bug510359", server : "0", expected : "0"},
    { url : "/bug510359", server : "1", expected : "1"},
];

function setupChannel(suffix, value) {
    var chan = NetUtil.newChannel({
        uri: "http://localhost:" + httpserver.identity.primaryPort + suffix,
        loadUsingSystemPrincipal: true
    });
    var httpChan = chan.QueryInterface(Ci.nsIHttpChannel);
    httpChan.requestMethod = "GET";
    httpChan.setRequestHeader("x-request", value, false);
    httpChan.setRequestHeader("Cookie", "c="+value, false);
    return httpChan;
}

function triggerNextTest() {
    var channel = setupChannel(tests[index].url, tests[index].server);
    channel.asyncOpen(new ChannelListener(checkValueAndTrigger, null));
}

function checkValueAndTrigger(request, data, ctx) {
    Assert.equal(tests[index].expected, data);

    if (index < tests.length - 1) {
        index++;
        triggerNextTest();
    } else {
        httpserver.stop(do_test_finished);
    }
}

function run_test() {
    httpserver.registerPathHandler("/bug510359", handler);
    httpserver.start(-1);

    // clear cache
    evict_cache_entries();

    triggerNextTest();

    do_test_pending();
}

function handler(metadata, response) {
    try {
        var IMS = metadata.getHeader("If-Modified-Since");
        response.setStatusLine(metadata.httpVersion, 500, "Failed");
        var msg = "Client should not set If-Modified-Since header";
        response.bodyOutputStream.write(msg, msg.length);
    } catch(ex) {
        response.setStatusLine(metadata.httpVersion, 200, "Ok");
        response.setHeader("Content-Type", "text/plain", false);
        response.setHeader("Last-Modified", getDateString(-1), false);
        response.setHeader("Vary", "Cookie", false);
        var body = metadata.getHeader("x-request");
        response.bodyOutputStream.write(body, body.length);
    }
}

function getDateString(yearDelta) {
    var months = [ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug',
            'Sep', 'Oct', 'Nov', 'Dec' ];
    var days = [ 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat' ];

    var d = new Date();
    return days[d.getUTCDay()] + ", " + d.getUTCDate() + " "
            + months[d.getUTCMonth()] + " " + (d.getUTCFullYear() + yearDelta)
            + " " + d.getUTCHours() + ":" + d.getUTCMinutes() + ":"
            + d.getUTCSeconds() + " UTC";
}