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Test Info: Errors
- This test failed 9 times in the preceding 30 days. quicksearch this test
- Manifest: toolkit/components/telemetry/tests/browser/browser.toml
"use strict";
const { TelemetryTestUtils } = ChromeUtils.importESModule(
);
const LOCATION =
const CORS_LOCATION =
const MEDIA_SCALAR_NAME = "media.element_in_page_count";
/**
* 'media.element_in_page_count' is a permanant scalar, this test is used to
* check if that scalar can be accumulated correctly under different situations.
*/
add_task(async function start_tests() {
// Clean all scalars first to prevent being interfered by former test.
TelemetryTestUtils.getProcessScalars("parent", false, true /* clear */);
await testMediaInPageScalar({
description: "load a page with one media element",
url: "file_media.html",
expectedScalarCount: 1,
});
await testMediaInPageScalar({
description: "load a page with multiple media elements",
url: "file_media.html",
options: {
createSecondMedia: true,
},
expectedScalarCount: 1,
});
await testMediaInPageScalar({
description: "load a page with media element created from iframe",
url: "file_iframe.html",
options: {
iframeUrl: "file_media.html",
},
expectedScalarCount: 1,
});
await testMediaInPageScalar({
description: "load a page with media element created from CORS iframe",
url: "file_iframe.html",
options: {
iframeUrl: "file_media.html",
CORSIframe: true,
},
expectedScalarCount: 1,
});
await testMediaInPageScalar({
description: "run multiple tabs, all loading media page",
url: "file_media.html",
options: {
tabNums: 2,
},
expectedScalarCount: 2,
});
});
async function testMediaInPageScalar({
description,
url,
options,
expectedScalarCount,
} = {}) {
info(`media scalar should be undefined in the start`);
let scalars = TelemetryTestUtils.getProcessScalars("parent");
is(scalars[MEDIA_SCALAR_NAME], undefined, "has not created media scalar yet");
info(`run test '${description}'`);
url = LOCATION + url;
await runMediaPage(url, options);
info(`media scalar should be increased to ${expectedScalarCount}`);
scalars = TelemetryTestUtils.getProcessScalars(
"parent",
false,
true /* clear */
);
is(
scalars[MEDIA_SCALAR_NAME],
expectedScalarCount,
"media scalar count is correct"
);
info("============= Next Testcase =============");
}
/**
* The following are helper functions.
*/
async function runMediaPage(url, options = {}) {
const tabNums = options.tabNums ? options.tabNums : 1;
for (let idx = 0; idx < tabNums; idx++) {
info(`open a tab loading media page`);
const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);
if (options.iframeUrl) {
let iframeURL = options.CORSIframe ? CORS_LOCATION : LOCATION;
iframeURL += options.iframeUrl;
await loadPageForIframe(tab, iframeURL);
}
if (options.createSecondMedia) {
info(`create second media in the page`);
await createMedia(tab);
}
info(`remove tab`);
await BrowserTestUtils.removeTab(tab);
await BrowserUtils.promiseObserved("window-global-destroyed");
}
}
function createMedia(tab) {
return SpecialPowers.spawn(tab.linkedBrowser, [], _ => {
const video = content.document.createElement("VIDEO");
video.src = "gizmo.mp4";
video.loop = true;
content.document.body.appendChild(video);
});
}
function loadPageForIframe(tab, url) {
return SpecialPowers.spawn(tab.linkedBrowser, [url], async url => {
const iframe = content.document.getElementById("iframe");
iframe.src = url;
await new Promise(r => (iframe.onload = r));
});
}