How to use initiateFetch method in wpt

Best JavaScript code snippet using wpt

resource-timing-level1.js

Source:resource-timing-level1.js

...23                        // Insert an empty IFrame.24                        var frame = document.createElement("iframe");25                        // Wait for the IFrame to load and ensure there is no resource entry for it on the timeline.26                        //27                        // We use the 'createOnloadCallbackFn()' helper which is normally invoked by 'initiateFetch()'28                        // to avoid setting the IFrame's src.  It registers a test step for us, finds our entry on the29                        // resource timeline, and wraps our callback function to automatically vet invariants.30                        frame.onload = createOnloadCallbackFn(test, frame, "about:blank",31                            function (initiator, entry) {32                                assert_equals(entry, undefined, "Inserting an IFrame with a src of 'about:blank' must not add an entry to the timeline.");33                                assertInvariants(34                                    test,35                                    function () {36                                        test.done();37                                    });38                            });39                        document.body.appendChild(frame);40                        // Paranoid check that the new IFrame has loaded about:blank.41                        assert_equals(42                            frame.contentWindow.location.href,43                            "about:blank",44                            "'Src' of new <iframe> must be 'about:blank'.");45                    }46            },47        ];48        // Create cached/uncached tests from the following array of templates.  For each template entry,49        // we add two identical test cases to 'testCases'.  The first case initiates a fetch to populate the50        // cache.  The second request initiates a fetch with the same URL to cover the case where we hit51        // the cache (if the caching policy permits caching).52        [53            { initiator: "iframe",         response: "(done)",      mime: mimeHtml },54            { initiator: "xmlhttprequest", response: "(done)",      mime: mimeText },55            // Multiple browsers seem to cheat a bit and race onLoad of images.  Microsoft https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/237918756            // { initiator: "img",            response: greenPng,      mime: mimePng },57            { initiator: "script",         response: '"";',         mime: mimeScript },58            { initiator: "link",           response: ".unused{}",   mime: mimeCss },59        ]60        .forEach(function (template) {61            testCases.push({62                description: "'" + template.initiator + " (Populate cache): The initial request populates the cache (if appropriate).",63                test: function (test) {64                    initiateFetch(65                        test,66                        template.initiator,67                        getSyntheticUrl(68                            "mime:" + encodeURIComponent(template.mime)69                                + "&send:" + encodeURIComponent(template.response),70                            /* allowCaching = */ true),71                        function (initiator, entry) {72                            test.done();73                        });74                    }75                });76            testCases.push({77                description: "'" + template.initiator + " (Potentially Cached): Immediately fetch the same URL, exercising the cache hit path (if any).",78                test: function (test) {79                    initiateFetch(80                        test,81                        template.initiator,82                        getSyntheticUrl(83                            "mime:" + encodeURIComponent(template.mime)84                                + "&send:" + encodeURIComponent(template.response),85                            /* allowCaching = */ true),86                        function (initiator, entry) {87                            test.done();88                        });89                    }90                });91            });92        // Create responseStart/responseEnd tests from the following array of templates.  In this test, the server delays before93        // responding with responsePart1, then delays again before completing with responsePart2.  The test looks for the expected94        // pauses before responseStart and responseEnd.95        [96            { initiator: "iframe",         responsePart1: serverStepDelay + "ms;", responsePart2: (serverStepDelay * 2) + "ms;(done)",                                                      mime: mimeHtml },97            { initiator: "xmlhttprequest", responsePart1: serverStepDelay + "ms;", responsePart2: (serverStepDelay * 2) + "ms;(done)",                                                      mime: mimeText },98            // 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/237918799            // { initiator: "img",            responsePart1: greenPng.substring(0, greenPng.length / 2), responsePart2: "0x" + greenPng.substring(greenPng.length / 2, greenPng.length),       mime: mimePng },100            { initiator: "script",         responsePart1: '"', responsePart2: '";',                                                                                                         mime: mimeScript },101            { initiator: "link",           responsePart1: ".unused{", responsePart2: "}",                                                                                                   mime: mimeCss },102        ]103        .forEach(function (template) {104            testCases.push({105                description: "'" + template.initiator + ": " + serverStepDelay + "ms delay before 'responseStart', another " + serverStepDelay + "ms delay before 'responseEnd'.",106                test: function (test) {107                    initiateFetch(108                        test,109                        template.initiator,110                        getSyntheticUrl(serverStepDelay + "ms"                          // Wait, then echo back responsePart1111                            + "&mime:" + encodeURIComponent(template.mime)112                            + "&send:" + encodeURIComponent(template.responsePart1)113                            + "&" + serverStepDelay + "ms"                              // Wait, then echo back responsePart2114                            + "&send:" + encodeURIComponent(template.responsePart2)),115                        function (initiator, entry) {116                            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:117                            // If no redirects (or equivalent) occur, this redirectStart/End must return zero.118                            assert_equals(entry.redirectStart, 0, "When no redirect occurs, redirectStart must be 0.");119                            assert_equals(entry.redirectEnd, 0, "When no redirect occurs, redirectEnd must be 0.");120                            // Server creates a gap between 'requestStart' and 'responseStart'.121                            assert_greater_than_equal(122                                entry.responseStart,123                                entry.requestStart + serverStepDelay,124                                "'responseStart' must be " + serverStepDelay + "ms later than 'requestStart'.");125                            // Server creates a gap between 'responseStart' and 'responseEnd'.126                            assert_greater_than_equal(127                                entry.responseEnd,128                                entry.responseStart + serverStepDelay,129                                "'responseEnd' must be " + serverStepDelay + "ms later than 'responseStart'.");130                            test.done();131                        });132                    }133                });134            });135        // Create redirectEnd/responseStart tests from the following array of templates.  In this test, the server delays before136        // redirecting to a new synthetic response, then delays again before responding with 'response'.  The test looks for the137        // expected pauses before redirectEnd and responseStart.138        [139            { initiator: "iframe",         response: serverStepDelay + "ms;redirect;" + (serverStepDelay * 2) + "ms;(done)",        mime: mimeHtml },140            { initiator: "xmlhttprequest", response: serverStepDelay + "ms;redirect;" + (serverStepDelay * 2) + "ms;(done)",        mime: mimeText },141            // 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/2379187142            // { initiator: "img",            response: greenPng,                                                                      mime: mimePng },143            { initiator: "script",         response: '"";',                                                                         mime: mimeScript },144            { initiator: "link",           response: ".unused{}",                                                                   mime: mimeCss },145        ]146        .forEach(function (template) {147            testCases.push({148                description: "'" + template.initiator + " (Redirected): " + serverStepDelay + "ms delay before 'redirectEnd', another " + serverStepDelay + "ms delay before 'responseStart'.",149                test: function (test) {150                    initiateFetch(151                        test,152                        template.initiator,153                        getSyntheticUrl(serverStepDelay + "ms"      // Wait, then redirect to a second page that waits154                            + "&redirect:"                          // before echoing back the response.155                                + encodeURIComponent(156                                    getSyntheticUrl(serverStepDelay + "ms"157                                        + "&mime:" + encodeURIComponent(template.mime)158                                        + "&send:" + encodeURIComponent(template.response)))),159                        function (initiator, entry) {160                            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:161                            //      "[If redirected, startTime] MUST return the same value as redirectStart.162                            assert_equals(entry.startTime, entry.redirectStart, "startTime must be equal to redirectStart.");163                            // Server creates a gap between 'redirectStart' and 'redirectEnd'.164                            assert_greater_than_equal(165                                entry.redirectEnd,166                                entry.redirectStart + serverStepDelay,167                                "'redirectEnd' must be " + serverStepDelay + "ms later than 'redirectStart'.");168                            // Server creates a gap between 'requestStart' and 'responseStart'.169                            assert_greater_than_equal(170                                entry.responseStart,171                                entry.requestStart + serverStepDelay,172                                "'responseStart' must be " + serverStepDelay + "ms later than 'requestStart'.");173                            test.done();174                        });175                    }176                });177            });178        // Ensure that responseStart only measures the time up to the first few179        // bytes of the header response. This is tested by writing an HTTP 1.1180        // status line, followed by a flush, then a pause before the end of the181        // headers. The test makes sure that responseStart is not delayed by182        // this pause.183        [184            { initiator: "iframe",         response: "(done)",    mime: mimeHtml },185            { initiator: "xmlhttprequest", response: "(done)",    mime: mimeText },186            { initiator: "script",         response: '"";',       mime: mimeScript },187            { initiator: "link",           response: ".unused{}", mime: mimeCss },188        ]189        .forEach(function (template) {190            testCases.push({191                description: "'" + template.initiator + " " + serverStepDelay + "ms delay in headers does not affect responseStart'",192                test: function (test) {193                    initiateFetch(194                        test,195                        template.initiator,196                        getSyntheticUrl("status:200"197                                        + "&flush"198                                        + "&" + serverStepDelay + "ms"199                                        + "&mime:" + template.mime200                                        + "&send:" + encodeURIComponent(template.response)),201                        function (initiator, entry) {202                            // Test that the delay between 'responseStart' and203                            // 'responseEnd' includes the delay, which implies204                            // that 'responseStart' was measured at the time of205                            // status line receipt.206                            assert_greater_than_equal(207                                entry.responseEnd,208                                entry.responseStart + serverStepDelay,209                                "Delay after HTTP/1.1 status should not affect 'responseStart'.");210                            test.done();211                        });212                    }213                });214            });215        // Test that responseStart uses the timing of 1XX responses by216        // synthesizing a delay between a 100 and 200 status, and verifying that217        // this delay is included before responseEnd. If the delay is not218        // included, this implies that the 200 status line was (incorrectly) used219        // for responseStart timing, despite the 100 response arriving earlier.220        //221        // Source: "In the case where more than one response is available for a222        // request, due to an Informational 1xx response, the reported223        // responseStart value is that of the first response to the last224        // request."225        [226            { initiator: "iframe",         response: "(done)",    mime: mimeHtml },227            { initiator: "xmlhttprequest", response: "(done)",    mime: mimeText },228            { initiator: "script",         response: '"";',       mime: mimeScript },229            { initiator: "link",           response: ".unused{}", mime: mimeCss },230        ]231        .forEach(function (template) {232            testCases.push({233                description: "'" + template.initiator + " responseStart uses 1XX (first) response timings'",234                test: function (test) {235                    initiateFetch(236                        test,237                        template.initiator,238                        getSyntheticUrl("status:100"239                                        + "&flush"240                                        + "&" + serverStepDelay + "ms"241                                        + "&status:200"242                                        + "&mime:" + template.mime243                                        + "&send:" + encodeURIComponent(template.response)),244                        function (initiator, entry) {245                            assert_greater_than_equal(246                                entry.responseEnd,247                                entry.responseStart + serverStepDelay,248                                "HTTP/1.1 1XX (first) response should determine 'responseStart' timing.");249                            test.done();250                        });251                    }252                });253            });254        // Function to run the next case in the queue.255        var currentTestIndex = -1;256        function runNextCase() {257            var testCase = testCases[++currentTestIndex];258            if (testCase !== undefined) {259                async_test(testCase.test, testCase.description);260            }261        }262        // When a test completes, run the next case in the queue.263        add_result_callback(runNextCase);264        // Start the first test.265        runNextCase();266        /** Iterates through all resource entries on the timeline, vetting all invariants. */267        function assertInvariants(test, done) {268            // 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/2379187269            // Yield for 100ms to workaround a suspected race where window.onload fires before270            //     script visible side-effects from the wininet/urlmon thread have finished.271            test.step_timeout(272                test.step_func(273                    function () {274                        performance275                            .getEntriesByType("resource")276                            .forEach(277                                function (entry, index, entries) {278                                    assertResourceEntryInvariants(entry);279                                });280                        done();281                    }),282                    100);283        }284        /** Assets the invariants for a resource timeline entry. */285        function assertResourceEntryInvariants(actual) {286            // Example from http://w3c.github.io/resource-timing/#resources-included:287            //     "If an HTML IFRAME element is added via markup without specifying a src attribute,288            //      the user agent may load the about:blank document for the IFRAME. If at a later time289            //      the src attribute is changed dynamically via script, the user agent may fetch the new290            //      URL resource for the IFRAME. In this case, only the fetch of the new URL would be291            //      included as a PerformanceResourceTiming object in the Performance Timeline."292            assert_not_equals(293                actual.name,294                "about:blank",295                "Fetch for 'about:blank' must not appear in timeline.");296            assert_not_equals(actual.startTime, 0, "startTime");297            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:298            //      "[If redirected, startTime] MUST return the same value as redirectStart. Otherwise,299            //      [startTime] MUST return the same value as fetchStart."300            assert_in_array(actual.startTime, [actual.redirectStart, actual.fetchStart],301                "startTime must be equal to redirectStart or fetchStart.");302            // redirectStart <= redirectEnd <= fetchStart <= domainLookupStart <= domainLookupEnd <= connectStart303            assert_less_than_equal(actual.redirectStart, actual.redirectEnd, "redirectStart <= redirectEnd");304            assert_less_than_equal(actual.redirectEnd, actual.fetchStart, "redirectEnd <= fetchStart");305            assert_less_than_equal(actual.fetchStart, actual.domainLookupStart, "fetchStart <= domainLookupStart");306            assert_less_than_equal(actual.domainLookupStart, actual.domainLookupEnd, "domainLookupStart <= domainLookupEnd");307            assert_less_than_equal(actual.domainLookupEnd, actual.connectStart, "domainLookupEnd <= connectStart");308            // Per https://w3c.github.io/resource-timing/#performanceresourcetiming:309            //      "This attribute is optional. User agents that don't have this attribute available MUST set it310            //      as undefined.  [...]  If the secureConnectionStart attribute is available but HTTPS is not used,311            //      this attribute MUST return zero."312            assert_true(actual.secureConnectionStart == undefined ||313                        actual.secureConnectionStart == 0 ||314                        actual.secureConnectionStart >= actual.connectEnd, "secureConnectionStart time");315            // connectStart <= connectEnd <= requestStart <= responseStart <= responseEnd316            assert_less_than_equal(actual.connectStart, actual.connectEnd, "connectStart <= connectEnd");317            assert_less_than_equal(actual.connectEnd, actual.requestStart, "connectEnd <= requestStart");318            assert_less_than_equal(actual.requestStart, actual.responseStart, "requestStart <= responseStart");319            assert_less_than_equal(actual.responseStart, actual.responseEnd, "responseStart <= responseEnd");320        }321        /** Helper function to resolve a relative URL */322        function canonicalize(url) {323            var div = document.createElement('div');324            div.innerHTML = "<a></a>";325            div.firstChild.href = url;326            div.innerHTML = div.innerHTML;327            return div.firstChild.href;328        }329        /** Generates a unique string, used by getSyntheticUrl() to avoid hitting the cache. */330        function createUniqueQueryArgument() {331            var result =332                "ignored_"333                    + Date.now()334                    + "-"335                    + ((Math.random() * 0xFFFFFFFF) >>> 0)336                    + "-"337                    + syntheticRequestCount;338            return result;339        }340        /** Count of the calls to getSyntheticUrl().  Used by createUniqueQueryArgument() to generate unique strings. */341        var syntheticRequestCount = 0;342        /** Return a URL to a server that will synthesize an HTTP response using the given343            commands. (See SyntheticResponse.aspx). */344        function getSyntheticUrl(commands, allowCache) {345            syntheticRequestCount++;346            var url =347                canonicalize("./SyntheticResponse.py")    // ASP.NET page that will synthesize the response.348                    + "?" + commands;                       // Commands that will be used.349            if (allowCache !== true) {                      // If caching is disallowed, append a unique argument350                url += "&" + createUniqueQueryArgument();   // to the URL's query string.351            }352            return url;353        }354        /** Given an 'initiatorType' (e.g., "img") , it triggers the appropriate type of fetch for the specified355            url and invokes 'onloadCallback' when the fetch completes.  If the fetch caused an entry to be created356            on the resource timeline, the entry is passed to the callback. */357        function initiateFetch(test, initiatorType, url, onloadCallback) {358            assertInvariants(359                test,360                function () {361                    log("--- Begin: " + url);362                    switch (initiatorType) {363                        case "script":364                        case "img":365                        case "iframe": {366                            var element = document.createElement(initiatorType);367                            document.body.appendChild(element);368                            element.onload = createOnloadCallbackFn(test, element, url, onloadCallback);369                            element.src = url;370                            break;371                        }...

useFetch.js

Source:useFetch.js

...8}9export default function useFetch(fetchURL, fetchOptions = {}) {10    const [request, setRequest] = useState(null);11    12    async function initiateFetch() {13        setRequest({error:null, data:null})14        try {15            const finalFetchOptions = {16                ...DEFAULT_FETCH_OPTIONS,17                ...fetchOptions,18                headers : {19                    ...DEFAULT_FETCH_OPTIONS.headers,20                    ...fetchOptions.headers21                },22            }23            const response = await fetch(fetchURL, finalFetchOptions)24            const responseBody = await response.json()25            if (response.ok)26                setRequest({error:null, data:responseBody})...

cms.actions.test.ts

Source:cms.actions.test.ts

...10        slug: "foo",11      });12    });13  });14  describe("initiateFetch()", () => {15    test("initiates an API fetch", () => {16      const slug = "foo";17      // @ts-expect-error ts-migrate(2345) FIXME: Argument of type '{ slug: string; }' is not assign... Remove this comment to see the full error message18      expect(initiateFetch({ slug })).toMatchObject({19        type: fetchTypes.FETCH,20        name: `${types.FETCH_PAGE_BY_SLUG}-${slug}`,21      });22    });23    test("fires a completed action when fetch finished", () => {24      const slug = "foo";25      // @ts-expect-error ts-migrate(2345) FIXME: Argument of type '{ slug: string; }' is not assign... Remove this comment to see the full error message26      expect(initiateFetch({ slug })).toMatchObject({27        postFetch: `${types.FETCH_PAGE_BY_SLUG_COMPLETE}-${slug}`,28      });29    });30    test("passes the fetcher function to the action", () => {31      const slug = "foo";32      // @ts-expect-error ts-migrate(2345) FIXME: Argument of type '{ slug: string; }' is not assign... Remove this comment to see the full error message33      const action = initiateFetch({ slug });34      expect(typeof action.asyncCall).toBe("function");35    });36    test("passes the right parameters to the fetcher function", () => {37      const slug = "foo";38      const hash = "123";39      const lang = "en";40      const action = initiateFetch({ slug, hash, lang });41      expect(action.asyncCallData).toEqual({ slug, hash, lang });42    });43  });...

Using AI Code Generation

1var wpt = require('wpt.js');2var wpt = new WebPageTest('www.webpagetest.org');3var options = {4};5wpt.initiateFetch(options, function(err, data) {6    if (err) {7        console.log('Error: ' + err);8    } else {9        console.log('Data: ' + data);10    }11});12### WebPageTest(host, port, apiKey, https)13### getLocations(callback)14### getTesters(callback)15### getTestStatus(testId, callback)16### getTestResults(testId, callback)17### getTestResultData(testId, data, callback)

Using AI Code Generation

1var wpt = require('./wpt.js');2var fs = require('fs');3wpt.initiateFetch(url, function(data) {4  fs.writeFile('response.json', JSON.stringify(data), function(err) {5    if (err) throw err;6    console.log('It\'s saved!');7  });8});

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.