mozilla-central/browser/base/content/test/tabcrashed/browser_multipleCrashedTabs.js (file symbol)

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/* Any copyright is dedicated to the Public Domain.
"use strict";
// eslint-disable-next-line @microsoft/sdl/no-insecure-url
const PAGE_1 = "http://example.com";
// eslint-disable-next-line @microsoft/sdl/no-insecure-url
const PAGE_2 = "http://example.org";
// eslint-disable-next-line @microsoft/sdl/no-insecure-url
const PAGE_3 = "http://example.net";
/**
* Checks that a particular about:tabcrashed page has the attribute set to
* use the "multiple about:tabcrashed" UI.
*
* @param browser (<xul:browser>)
* The browser to check.
* @param expected (Boolean)
* True if we expect the "multiple" state to be set.
* @returns Promise
* @resolves undefined
* When the check has completed.
*/
async function assertShowingMultipleUI(browser, expected) {
let showingMultiple = await SpecialPowers.spawn(browser, [], async () => {
return (
content.document.getElementById("main").getAttribute("multiple") == "true"
);
});
Assert.equal(showingMultiple, expected, "Got the expected 'multiple' state.");
}
/**
* Takes a Telemetry histogram snapshot and returns the sum of all counts.
*
* @param snapshot (Object)
* The Telemetry histogram snapshot to examine.
* @return (int)
* The sum of all counts in the snapshot.
*/
function snapshotCount(snapshot) {
return Object.values(snapshot.values).reduce((a, b) => a + b, 0);
}
/**
* Switches to a tab, crashes it, and waits for about:tabcrashed
* to load.
*
* @param tab (<xul:tab>)
* The tab to switch to and crash.
* @returns Promise
* @resolves undefined
* When about:tabcrashed is loaded.
*/
async function switchToAndCrashTab(tab) {
let browser = tab.linkedBrowser;
await BrowserTestUtils.switchTab(gBrowser, tab);
let tabcrashed = BrowserTestUtils.waitForEvent(
browser,
"AboutTabCrashedReady",
false,
null,
true
);
await BrowserTestUtils.crashFrame(browser);
await tabcrashed;
}
/**
* Tests that the appropriate pieces of UI in the about:tabcrashed pages
* are updated to reflect how many other about:tabcrashed pages there
* are.
*/
add_task(async function test_multiple_tabcrashed_pages() {
let histogram = Services.telemetry.getHistogramById(
"FX_CONTENT_CRASH_NOT_SUBMITTED"
);
histogram.clear();
let tab1 = await BrowserTestUtils.openNewForegroundTab(gBrowser, PAGE_1);
let browser1 = tab1.linkedBrowser;
let tab2 = await BrowserTestUtils.openNewForegroundTab(gBrowser, PAGE_2);
let browser2 = tab2.linkedBrowser;
let tab3 = await BrowserTestUtils.openNewForegroundTab(gBrowser, PAGE_3);
let browser3 = tab3.linkedBrowser;
await switchToAndCrashTab(tab1);
Assert.ok(tab1.hasAttribute("crashed"), "tab1 has crashed");
Assert.ok(!tab2.hasAttribute("crashed"), "tab2 has not crashed");
Assert.ok(!tab3.hasAttribute("crashed"), "tab3 has not crashed");
// Should not be showing UI for multiple tabs in tab1.
await assertShowingMultipleUI(browser1, false);
await switchToAndCrashTab(tab2);
Assert.ok(tab1.hasAttribute("crashed"), "tab1 is still crashed");
Assert.ok(tab2.hasAttribute("crashed"), "tab2 has crashed");
Assert.ok(!tab3.hasAttribute("crashed"), "tab3 has not crashed");
// tab1 and tab2 should now be showing UI for multiple tab crashes.
await assertShowingMultipleUI(browser1, true);
await assertShowingMultipleUI(browser2, true);
await switchToAndCrashTab(tab3);
Assert.ok(tab1.hasAttribute("crashed"), "tab1 is still crashed");
Assert.ok(tab2.hasAttribute("crashed"), "tab2 is still crashed");
Assert.ok(tab3.hasAttribute("crashed"), "tab3 has crashed");
// tab1 and tab2 should now be showing UI for multiple tab crashes.
await assertShowingMultipleUI(browser1, true);
await assertShowingMultipleUI(browser2, true);
await assertShowingMultipleUI(browser3, true);
BrowserTestUtils.removeTab(tab1);
await assertShowingMultipleUI(browser2, true);
await assertShowingMultipleUI(browser3, true);
BrowserTestUtils.removeTab(tab2);
await assertShowingMultipleUI(browser3, false);
BrowserTestUtils.removeTab(tab3);
// We only record the FX_CONTENT_CRASH_NOT_SUBMITTED probe if there
// was a single about:tabcrashed page at unload time, so we expect
// only a single entry for the probe for when we removed the last
// crashed tab.
await BrowserTestUtils.waitForCondition(() => {
return snapshotCount(histogram.snapshot()) == 1;
}, `Collected value should become 1.`);
histogram.clear();
});