From 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 03:47:29 +0200
Subject: Adding upstream version 115.8.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../resource-timing/resource-timing-level1.js      | 476 +++++++++++++++++++++
 1 file changed, 476 insertions(+)
 create mode 100644 testing/web-platform/tests/resource-timing/resource-timing-level1.js

(limited to 'testing/web-platform/tests/resource-timing/resource-timing-level1.js')

diff --git a/testing/web-platform/tests/resource-timing/resource-timing-level1.js b/testing/web-platform/tests/resource-timing/resource-timing-level1.js
new file mode 100644
index 0000000000..6167777fe6
--- /dev/null
+++ b/testing/web-platform/tests/resource-timing/resource-timing-level1.js
@@ -0,0 +1,476 @@
+"use strict";
+
+window.onload =
+    function () {
+        setup({ explicit_timeout: true });
+
+        /** Number of milliseconds to delay when the server injects pauses into the response.
+
+            This should be large enough that we can distinguish it from noise with high confidence,
+            but small enough that tests complete quickly. */
+        var serverStepDelay = 250;
+
+        var mimeHtml    = "text/html";
+        var mimeText    = "text/plain";
+        var mimePng     = "image/png";
+        var mimeScript  = "application/javascript";
+        var mimeCss     = "text/css";
+
+        /** Hex encoding of a a 150x50px green PNG. */
+        var greenPng = "0x89504E470D0A1A0A0000000D494844520000006400000032010300000090FBECFD00000003504C544500FF00345EC0A80000000F49444154281563601805A36068020002BC00011BDDE3900000000049454E44AE426082";
+
+        /** Array containing test cases to run.  Initially, it contains the one-off 'about:blank" test,
+            but additional cases are pushed below by expanding templates. */
+        var testCases = [
+            {
+                description: "No timeline entry for about:blank",
+                test:
+                    function (test) {
+                        // Insert an empty IFrame.
+                        var frame = document.createElement("iframe");
+
+                        // Wait for the IFrame to load and ensure there is no resource entry for it on the timeline.
+                        //
+                        // We use the 'createOnloadCallbackFn()' helper which is normally invoked by 'initiateFetch()'
+                        // to avoid setting the IFrame's src.  It registers a test step for us, finds our entry on the
+                        // resource timeline, and wraps our callback function to automatically vet invariants.
+                        frame.onload = createOnloadCallbackFn(test, frame, "about:blank",
+                            function (initiator, entry) {
+                                assert_equals(entry, undefined, "Inserting an IFrame with a src of 'about:blank' must not add an entry to the timeline.");
+                                assertInvariants(
+                                    test,
+                                    function () {
+                                        test.done();
+                                    });
+                            });
+
+                        document.body.appendChild(frame);
+
+                        // Paranoid check that the new IFrame has loaded about:blank.
+                        assert_equals(
+                            frame.contentWindow.location.href,
+                            "about:blank",
+                            "'Src' of new <iframe> must be 'about:blank'.");
+                    }
+            },
+        ];
+
+        // Create cached/uncached tests from the following array of templates.  For each template entry,
+        // we add two identical test cases to 'testCases'.  The first case initiates a fetch to populate the
+        // cache.  The second request initiates a fetch with the same URL to cover the case where we hit
+        // the cache (if the caching policy permits caching).
+        [
+            { initiator: "iframe",         response: "(done)",      mime: mimeHtml },
+            { initiator: "xmlhttprequest", response: "(done)",      mime: mimeText },
+            // Multiple browsers seem to cheat a bit and race onLoad of images.  Microsoft https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/2379187
+            // { initiator: "img",            response: greenPng,      mime: mimePng },
+            { initiator: "script",         response: '"";',         mime: mimeScript },
+            { initiator: "link",           response: ".unused{}",   mime: mimeCss },
+        ]
+        .forEach(function (template) {
+            testCases.push({
+                description: "'" + template.initiator + " (Populate cache): The initial request populates the cache (if appropriate).",
+                test: function (test) {
+                    initiateFetch(
+                        test,
+                        template.initiator,
+                        getSyntheticUrl(
+                            "mime:" + encodeURIComponent(template.mime)
+                                + "&send:" + encodeURIComponent(template.response),
+                            /* allowCaching = */ true),
+                        function (initiator, entry) {
+                            test.done();
+                        });
+                    }
+                });
+
+            testCases.push({
+                description: "'" + template.initiator + " (Potentially Cached): Immediately fetch the same URL, exercising the cache hit path (if any).",
+                test: function (test) {
+                    initiateFetch(
+                        test,
+                        template.initiator,
+                        getSyntheticUrl(
+                            "mime:" + encodeURIComponent(template.mime)
+                                + "&send:" + encodeURIComponent(template.response),
+                            /* allowCaching = */ true),
+                        function (initiator, entry) {
+                            test.done();
+                        });
+                    }
+                });
+            });
+
+        // Create responseStart/responseEnd tests from the following array of templates.  In this test, the server delays before
+        // responding with responsePart1, then delays again before completing with responsePart2.  The test looks for the expected
+        // pauses before responseStart and responseEnd.
+        [
+            { initiator: "iframe",         responsePart1: serverStepDelay + "ms;", responsePart2: (serverStepDelay * 2) + "ms;(done)",                                                      mime: mimeHtml },
+            { initiator: "xmlhttprequest", responsePart1: serverStepDelay + "ms;", responsePart2: (serverStepDelay * 2) + "ms;(done)",                                                      mime: mimeText },
+            // Multiple browsers seem to cheat a bit and race img.onLoad and setting responseEnd.  Microsoft https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/2379187
+            // { initiator: "img",            responsePart1: greenPng.substring(0, greenPng.length / 2), responsePart2: "0x" + greenPng.substring(greenPng.length / 2, greenPng.length),       mime: mimePng },
+            { initiator: "script",         responsePart1: '"', responsePart2: '";',                                                                                                         mime: mimeScript },
+            { initiator: "link",           responsePart1: ".unused{", responsePart2: "}",                                                                                                   mime: mimeCss },
+        ]
+        .forEach(function (template) {
+            testCases.push({
+                description: "'" + template.initiator + ": " + serverStepDelay + "ms delay before 'responseStart', another " + serverStepDelay + "ms delay before 'responseEnd'.",
+                test: function (test) {
+                    initiateFetch(
+                        test,
+                        template.initiator,
+                        getSyntheticUrl(serverStepDelay + "ms"                          // Wait, then echo back responsePart1
+                            + "&mime:" + encodeURIComponent(template.mime)
+                            + "&send:" + encodeURIComponent(template.responsePart1)
+                            + "&" + serverStepDelay + "ms"                              // Wait, then echo back responsePart2
+                            + "&send:" + encodeURIComponent(template.responsePart2)),
+
+                        function (initiator, entry) {
+                            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:
+                            // If no redirects (or equivalent) occur, this redirectStart/End must return zero.
+                            assert_equals(entry.redirectStart, 0, "When no redirect occurs, redirectStart must be 0.");
+                            assert_equals(entry.redirectEnd, 0, "When no redirect occurs, redirectEnd must be 0.");
+
+                            // Server creates a gap between 'requestStart' and 'responseStart'.
+                            assert_greater_than_equal(
+                                entry.responseStart,
+                                entry.requestStart + serverStepDelay,
+                                "'responseStart' must be " + serverStepDelay + "ms later than 'requestStart'.");
+
+                            // Server creates a gap between 'responseStart' and 'responseEnd'.
+                            assert_greater_than_equal(
+                                entry.responseEnd,
+                                entry.responseStart + serverStepDelay,
+                                "'responseEnd' must be " + serverStepDelay + "ms later than 'responseStart'.");
+
+                            test.done();
+                        });
+                    }
+                });
+            });
+
+        // Create redirectEnd/responseStart tests from the following array of templates.  In this test, the server delays before
+        // redirecting to a new synthetic response, then delays again before responding with 'response'.  The test looks for the
+        // expected pauses before redirectEnd and responseStart.
+        [
+            { initiator: "iframe",         response: serverStepDelay + "ms;redirect;" + (serverStepDelay * 2) + "ms;(done)",        mime: mimeHtml },
+            { initiator: "xmlhttprequest", response: serverStepDelay + "ms;redirect;" + (serverStepDelay * 2) + "ms;(done)",        mime: mimeText },
+            // Multiple browsers seem to cheat a bit and race img.onLoad and setting responseEnd.  Microsoft https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/2379187
+            // { initiator: "img",            response: greenPng,                                                                      mime: mimePng },
+            { initiator: "script",         response: '"";',                                                                         mime: mimeScript },
+            { initiator: "link",           response: ".unused{}",                                                                   mime: mimeCss },
+        ]
+        .forEach(function (template) {
+            testCases.push({
+                description: "'" + template.initiator + " (Redirected): " + serverStepDelay + "ms delay before 'redirectEnd', another " + serverStepDelay + "ms delay before 'responseStart'.",
+                test: function (test) {
+                    initiateFetch(
+                        test,
+                        template.initiator,
+                        getSyntheticUrl(serverStepDelay + "ms"      // Wait, then redirect to a second page that waits
+                            + "&redirect:"                          // before echoing back the response.
+                                + encodeURIComponent(
+                                    getSyntheticUrl(serverStepDelay + "ms"
+                                        + "&mime:" + encodeURIComponent(template.mime)
+                                        + "&send:" + encodeURIComponent(template.response)))),
+                        function (initiator, entry) {
+                            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:
+                            //      "[If redirected, startTime] MUST return the same value as redirectStart.
+                            assert_equals(entry.startTime, entry.redirectStart, "startTime must be equal to redirectStart.");
+
+                            // Server creates a gap between 'redirectStart' and 'redirectEnd'.
+                            assert_greater_than_equal(
+                                entry.redirectEnd,
+                                entry.redirectStart + serverStepDelay,
+                                "'redirectEnd' must be " + serverStepDelay + "ms later than 'redirectStart'.");
+
+                            // Server creates a gap between 'requestStart' and 'responseStart'.
+                            assert_greater_than_equal(
+                                entry.responseStart,
+                                entry.requestStart + serverStepDelay,
+                                "'responseStart' must be " + serverStepDelay + "ms later than 'requestStart'.");
+
+                            test.done();
+                        });
+                    }
+                });
+            });
+
+        // Ensure that responseStart only measures the time up to the first few
+        // bytes of the header response. This is tested by writing an HTTP 1.1
+        // status line, followed by a flush, then a pause before the end of the
+        // headers. The test makes sure that responseStart is not delayed by
+        // this pause.
+        [
+            { initiator: "iframe",         response: "(done)",    mime: mimeHtml },
+            { initiator: "xmlhttprequest", response: "(done)",    mime: mimeText },
+            { initiator: "script",         response: '"";',       mime: mimeScript },
+            { initiator: "link",           response: ".unused{}", mime: mimeCss },
+        ]
+        .forEach(function (template) {
+            testCases.push({
+                description: "'" + template.initiator + " " + serverStepDelay + "ms delay in headers does not affect responseStart'",
+                test: function (test) {
+                    initiateFetch(
+                        test,
+                        template.initiator,
+                        getSyntheticUrl("status:200"
+                                        + "&flush"
+                                        + "&" + serverStepDelay + "ms"
+                                        + "&mime:" + template.mime
+                                        + "&send:" + encodeURIComponent(template.response)),
+                        function (initiator, entry) {
+                            // Test that the delay between 'responseStart' and
+                            // 'responseEnd' includes the delay, which implies
+                            // that 'responseStart' was measured at the time of
+                            // status line receipt.
+                            assert_greater_than_equal(
+                                entry.responseEnd,
+                                entry.responseStart + serverStepDelay,
+                                "Delay after HTTP/1.1 status should not affect 'responseStart'.");
+
+                            test.done();
+                        });
+                    }
+                });
+            });
+
+        // Function to run the next case in the queue.
+        var currentTestIndex = -1;
+        function runNextCase() {
+            var testCase = testCases[++currentTestIndex];
+            if (testCase !== undefined) {
+                async_test(testCase.test, testCase.description);
+            }
+        }
+
+        // When a test completes, run the next case in the queue.
+        add_result_callback(runNextCase);
+
+        // Start the first test.
+        runNextCase();
+
+        /** Iterates through all resource entries on the timeline, vetting all invariants. */
+        function assertInvariants(test, done) {
+            // Multiple browsers seem to cheat a bit and race img.onLoad and setting responseEnd.  Microsoft https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/2379187
+            // Yield for 100ms to workaround a suspected race where window.onload fires before
+            //     script visible side-effects from the wininet/urlmon thread have finished.
+            test.step_timeout(
+                test.step_func(
+                    function () {
+                        performance
+                            .getEntriesByType("resource")
+                            .forEach(
+                                function (entry, index, entries) {
+                                    assertResourceEntryInvariants(entry);
+                                });
+
+                        done();
+                    }),
+                    100);
+        }
+
+        /** Assets the invariants for a resource timeline entry. */
+        function assertResourceEntryInvariants(actual) {
+            // Example from http://w3c.github.io/resource-timing/#resources-included:
+            //     "If an HTML IFRAME element is added via markup without specifying a src attribute,
+            //      the user agent may load the about:blank document for the IFRAME. If at a later time
+            //      the src attribute is changed dynamically via script, the user agent may fetch the new
+            //      URL resource for the IFRAME. In this case, only the fetch of the new URL would be
+            //      included as a PerformanceResourceTiming object in the Performance Timeline."
+            assert_not_equals(
+                actual.name,
+                "about:blank",
+                "Fetch for 'about:blank' must not appear in timeline.");
+
+            assert_not_equals(actual.startTime, 0, "startTime");
+
+            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:
+            //      "[If redirected, startTime] MUST return the same value as redirectStart. Otherwise,
+            //      [startTime] MUST return the same value as fetchStart."
+            assert_in_array(actual.startTime, [actual.redirectStart, actual.fetchStart],
+                "startTime must be equal to redirectStart or fetchStart.");
+
+            // redirectStart <= redirectEnd <= fetchStart <= domainLookupStart <= domainLookupEnd <= connectStart
+            assert_less_than_equal(actual.redirectStart, actual.redirectEnd, "redirectStart <= redirectEnd");
+            assert_less_than_equal(actual.redirectEnd, actual.fetchStart, "redirectEnd <= fetchStart");
+            assert_less_than_equal(actual.fetchStart, actual.domainLookupStart, "fetchStart <= domainLookupStart");
+            assert_less_than_equal(actual.domainLookupStart, actual.domainLookupEnd, "domainLookupStart <= domainLookupEnd");
+            assert_less_than_equal(actual.domainLookupEnd, actual.connectStart, "domainLookupEnd <= connectStart");
+
+            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:
+            //      "This attribute is optional. User agents that don't have this attribute available MUST set it
+            //      as undefined.  [...]  If the secureConnectionStart attribute is available but HTTPS is not used,
+            //      this attribute MUST return zero."
+            assert_true(actual.secureConnectionStart == undefined ||
+                        actual.secureConnectionStart == 0 ||
+                        actual.secureConnectionStart >= actual.connectEnd, "secureConnectionStart time");
+
+            // connectStart <= connectEnd <= requestStart <= responseStart <= responseEnd
+            assert_less_than_equal(actual.connectStart, actual.connectEnd, "connectStart <= connectEnd");
+            assert_less_than_equal(actual.connectEnd, actual.requestStart, "connectEnd <= requestStart");
+            assert_less_than_equal(actual.requestStart, actual.responseStart, "requestStart <= responseStart");
+            assert_less_than_equal(actual.responseStart, actual.responseEnd, "responseStart <= responseEnd");
+        }
+
+        /** Helper function to resolve a relative URL */
+        function canonicalize(url) {
+            var div = document.createElement('div');
+            div.innerHTML = "<a></a>";
+            div.firstChild.href = url;
+            div.innerHTML = div.innerHTML;
+            return div.firstChild.href;
+        }
+
+        /** Generates a unique string, used by getSyntheticUrl() to avoid hitting the cache. */
+        function createUniqueQueryArgument() {
+            var result =
+                "ignored_"
+                    + Date.now()
+                    + "-"
+                    + ((Math.random() * 0xFFFFFFFF) >>> 0)
+                    + "-"
+                    + syntheticRequestCount;
+
+            return result;
+        }
+
+        /** Count of the calls to getSyntheticUrl().  Used by createUniqueQueryArgument() to generate unique strings. */
+        var syntheticRequestCount = 0;
+
+        /** Return a URL to a server that will synthesize an HTTP response using the given
+            commands. (See SyntheticResponse.aspx). */
+        function getSyntheticUrl(commands, allowCache) {
+            syntheticRequestCount++;
+
+            var url =
+                canonicalize("./SyntheticResponse.py")    // ASP.NET page that will synthesize the response.
+                    + "?" + commands;                       // Commands that will be used.
+
+            if (allowCache !== true) {                      // If caching is disallowed, append a unique argument
+                url += "&" + createUniqueQueryArgument();   // to the URL's query string.
+            }
+
+            return url;
+        }
+
+        /** Given an 'initiatorType' (e.g., "img") , it triggers the appropriate type of fetch for the specified
+            url and invokes 'onloadCallback' when the fetch completes.  If the fetch caused an entry to be created
+            on the resource timeline, the entry is passed to the callback. */
+        function initiateFetch(test, initiatorType, url, onloadCallback) {
+            assertInvariants(
+                test,
+                function () {
+                    log("--- Begin: " + url);
+
+                    switch (initiatorType) {
+                        case "script":
+                        case "img":
+                        case "iframe": {
+                            var element = document.createElement(initiatorType);
+                            document.body.appendChild(element);
+                            element.onload = createOnloadCallbackFn(test, element, url, onloadCallback);
+                            element.src = url;
+                            break;
+                        }
+                        case "link": {
+                            var element = document.createElement(initiatorType);
+                            element.rel = "stylesheet";
+                            document.body.appendChild(element);
+                            element.onload = createOnloadCallbackFn(test, element, url, onloadCallback);
+                            element.href = url;
+                            break;
+                        }
+                        case "xmlhttprequest": {
+                            var xhr = new XMLHttpRequest();
+                            xhr.open('GET', url, true);
+                            xhr.onreadystatechange = createOnloadCallbackFn(test, xhr, url, onloadCallback);
+                            xhr.send();
+                            break;
+                        }
+                        default:
+                            assert_unreached("Unsupported initiatorType '" + initiatorType + "'.");
+                            break;
+                    }});
+        }
+
+        /** Used by 'initiateFetch' to register a test step for the asynchronous callback, vet invariants,
+            find the matching resource timeline entry (if any), and pass it to the given 'onloadCallback'
+            when invoked. */
+        function createOnloadCallbackFn(test, initiator, url, onloadCallback) {
+            // Remember the number of entries on the timeline prior to initiating the fetch:
+            var beforeEntryCount = performance.getEntriesByType("resource").length;
+
+            return test.step_func(
+                function() {
+                    // If the fetch was initiated by XHR, we're subscribed to the 'onreadystatechange' event.
+                    // Ignore intermediate callbacks and wait for the XHR to complete.
+                    if (Object.getPrototypeOf(initiator) === XMLHttpRequest.prototype) {
+                        if (initiator.readyState != 4) {
+                            return;
+                        }
+                    }
+
+                    var entries = performance.getEntriesByType("resource");
+                    var candidateEntry = entries[entries.length - 1];
+
+                    switch (entries.length - beforeEntryCount)
+                    {
+                        case 0:
+                            candidateEntry = undefined;
+                            break;
+                        case 1:
+                            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:
+                            //     "This attribute MUST return the resolved URL of the requested resource. This attribute
+                            //      MUST NOT change even if the fetch redirected to a different URL."
+                            assert_equals(candidateEntry.name, url, "'name' did not match expected 'url'.");
+                            logResourceEntry(candidateEntry);
+                            break;
+                        default:
+                            assert_unreached("At most, 1 entry should be added to the performance timeline during a fetch.");
+                            break;
+                    }
+
+                    assertInvariants(
+                        test,
+                        function () {
+                            onloadCallback(initiator, candidateEntry);
+                        });
+                });
+        }
+
+        /** Log the given text to the document element with id='output' */
+        function log(text) {
+            var output = document.getElementById("output");
+            output.textContent += text + "\r\n";
+        }
+
+        add_completion_callback(function () {
+            var output = document.getElementById("output");
+            var button = document.createElement('button');
+            output.parentNode.insertBefore(button, output);
+            button.onclick = function () {
+                var showButton = output.style.display == 'none';
+                output.style.display = showButton ? null : 'none';
+                button.textContent = showButton ? 'Hide details' : 'Show details';
+            }
+            button.onclick();
+            var iframes = document.querySelectorAll('iframe');
+            for (var i = 0; i < iframes.length; i++)
+                iframes[i].parentNode.removeChild(iframes[i]);
+        });
+
+        /** pretty print a resource timeline entry. */
+        function logResourceEntry(entry) {
+            log("[" + entry.entryType + "] " + entry.name);
+
+            ["startTime", "redirectStart", "redirectEnd", "fetchStart", "domainLookupStart", "domainLookupEnd", "connectStart", "secureConnectionStart", "connectEnd", "requestStart", "responseStart", "responseEnd"]
+                .forEach(
+                    function (property, index, array) {
+                        var value = entry[property];
+                        log(property + ":\t" + value);
+                    });
+
+            log("\r\n");
+        }
+    };
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