<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script src="/js-test-resources/js-test.js"></script>
</head>
<body>
<script>
    description("Tests that partitioning is removed mid-flight in redirects.");
    jsTestIsAsync = true;

    function setEnableFeature(enable) {
        if (!enable)
            testRunner.statisticsResetToConsistentState();
        internals.setResourceLoadStatisticsEnabled(enable);
        testRunner.setCookieStoragePartitioningEnabled(enable);
    }

    const partitionHost = "127.0.0.1:8000";
    const thirdPartyOrigin = "http://localhost:8000";
    const resourcePath = "/resourceLoadStatistics/resources";
    const thirdPartyBaseUrl = thirdPartyOrigin + resourcePath;
    const firstPartyCookieName = "firstPartyCookie";
    const subPathToSetFirstPartyCookie = "/set-cookie.php?name=" + firstPartyCookieName + "&value=value";
    const partitionedCookieName = "partitionedCookie";
    const subPathToSetPartitionedCookie = "/set-cookie.php?name=" + partitionedCookieName + "&value=value";
    const returnUrl = "http://" + partitionHost + "/resourceLoadStatistics/remove-partitioning-in-redirect.html";
    const subPathToGetCookies = "/get-cookies.php?name1=" + firstPartyCookieName + "&name2=" + partitionedCookieName;
    const redirectChainUrl = thirdPartyOrigin + resourcePath + "/redirect.php?redirectTo=http://" + partitionHost + resourcePath + subPathToGetCookies;

    function openIframe(url, onLoadHandler) {
        const element = document.createElement("iframe");
        element.src = url;
        if (onLoadHandler) {
            element.onload = onLoadHandler;
        }
        document.body.appendChild(element);
    }

    function runTest() {
        switch (document.location.hash) {
            case "#step1":
                // Set first-party cookies for 127.0.0.1 and localhost.
                document.cookie = firstPartyCookieName + "=127.0.0.1;path='/'";
                document.location.href = thirdPartyBaseUrl + subPathToSetFirstPartyCookie + "#" + returnUrl + "#step2";
                break;
            case "#step2":
                // Check that the cookie gets sent for localhost under 127.0.0.1 since localhost is not prevalent.
                document.location.hash = "step3";
                openIframe(thirdPartyBaseUrl + subPathToGetCookies + "&message=Should receive first-party cookie.", runTest);
                break;
            case "#step3":
                document.location.hash = "step4";
                // Load an iframe in a redirect chain that starts with localhost and ends with 127.0.0.1. Expect a cookie for 127.0.0.1.
                openIframe(redirectChainUrl + "&message=Redirect case 1, should receive first-party cookie for 127.0.0.1.", runTest);
                break;
            case "#step4":
                // Set localhost as prevalent and with non-recent user interaction to put it in the partitioning category.
                document.location.hash = "step5";
                testRunner.setStatisticsPrevalentResource("http://localhost", true);
                if (!testRunner.isStatisticsPrevalentResource("http://localhost"))
                    testFailed("Host did not get set as prevalent resource.");
                testRunner.setStatisticsHasHadNonRecentUserInteraction("http://localhost");
                testRunner.statisticsUpdateCookiePartitioning(function() {
                    runTest();
                });
                break;
            case "#step5":
                // Set partitioned cookie for localhost under 127.0.0.1.
                document.location.hash = "step6";
                openIframe(thirdPartyBaseUrl + subPathToSetPartitionedCookie + "&message=Set partitioned, third-party cookie.", runTest);
                break;
            case "#step6":
                // Check that partitioned cookie gets sent for localhost under 127.0.0.1 since localhost is partitioned.
                document.location.hash = "step7";
                openIframe(thirdPartyBaseUrl + subPathToGetCookies +  "&message=Should receive partitioned cookie.", runTest);
                break;
            case "#step7":
                // Load an iframe in a redirect chain that starts with localhost and ends with 127.0.0.1. Expect a cookie for 127.0.0.1.
                document.location.hash = "step8";
                openIframe(redirectChainUrl + "&message=Redirect case 2, should receive first-party cookie for 127.0.0.1.", runTest);
                break;
            case "#step8":
                setEnableFeature(false);
                finishJSTest();
                break;
        }
    }

    if (document.location.hash === "") {
        setEnableFeature(true);
        if (testRunner.isStatisticsPrevalentResource("http://localhost"))
            testFailed("Localhost was classified as prevalent resource before the test starts.");
        testRunner.dumpChildFramesAsText();
        document.location.hash = "step1";
        // Make sure the network process is up-to-date.
        testRunner.statisticsSetShouldPartitionCookiesForHost("localhost", false, runTest);
    } else {
        runTest();
    }
</script>
</body>
</html>