forked from mirrors/gecko-dev
562c3c69fc
Depends on D109217 Differential Revision: https://phabricator.services.mozilla.com/D109218
98 lines
4 KiB
JavaScript
98 lines
4 KiB
JavaScript
add_task(async function() {
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// We don't want the number of total viewers to be calculated by the available size
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// for this test case. Instead, fix the number of viewers.
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await SpecialPowers.pushPrefEnv({
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set: [
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["browser.sessionhistory.max_total_viewers", 3],
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["docshell.shistory.testing.bfevict", true],
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// If Fission is disabled, the pref is no-op.
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["fission.bfcacheInParent", true],
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],
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});
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// 1. Open a tab
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var testPage =
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"data:text/html,<html id='html1'><body id='body1'>First tab ever opened</body></html>";
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await BrowserTestUtils.withNewTab({ gBrowser, url: testPage }, async function(
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browser
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) {
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let testDone = {};
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if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
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// 2. Add a promise that will be resolved when the 'content viewer evicted' event goes off
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testDone.promise = SpecialPowers.spawn(browser, [], async function() {
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return new Promise(resolve => {
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let webNavigation = content.docShell.QueryInterface(
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Ci.nsIWebNavigation
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);
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let { legacySHistory } = webNavigation.sessionHistory;
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// 3. Register a session history listener to listen for a 'content viewer evicted' event.
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let historyListener = {
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OnContentViewerEvicted() {
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ok(
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true,
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"History listener got called after a content viewer was evicted"
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);
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legacySHistory.removeSHistoryListener(historyListener);
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// 6. Resolve the promise when we got our 'content viewer evicted' event
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resolve();
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},
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QueryInterface: ChromeUtils.generateQI([
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"nsISHistoryListener",
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"nsISupportsWeakReference",
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]),
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};
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legacySHistory.addSHistoryListener(historyListener);
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// Keep the weak shistory listener alive
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content._testListener = historyListener;
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});
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});
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} else {
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// 2. Add a promise that will be resolved when the 'content viewer evicted' event goes off
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testDone.promise = new Promise(resolve => {
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testDone.resolve = resolve;
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});
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let shistory = browser.browsingContext.sessionHistory;
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// 3. Register a session history listener to listen for a 'content viewer evicted' event.
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let historyListener = {
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OnContentViewerEvicted() {
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ok(
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true,
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"History listener got called after a content viewer was evicted"
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);
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shistory.removeSHistoryListener(historyListener);
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delete window._testListener;
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// 6. Resolve the promise when we got our 'content viewer evicted' event
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testDone.resolve();
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},
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QueryInterface: ChromeUtils.generateQI([
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"nsISHistoryListener",
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"nsISupportsWeakReference",
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]),
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};
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shistory.addSHistoryListener(historyListener);
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// Keep the weak shistory listener alive
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window._testListener = historyListener;
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}
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// 4. Open a second tab
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testPage = `data:text/html,<html id='html1'><body id='body1'>I am a second tab!</body></html>`;
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let tab2 = await BrowserTestUtils.openNewForegroundTab(gBrowser, testPage);
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// 5. Navigate the first tab to 4 different pages.
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// We should get 1 content viewer evicted because it will be outside of the range.
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// If we have the following pages in our session history: P1 P2 P3 P4 P5
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// and we are currently at P5, then P1 is outside of the range
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// (it is more than 3 entries away from current entry) and thus will be evicted.
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for (var i = 0; i < 4; i++) {
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testPage = `data:text/html,<html id='html1'><body id='body1'>${i}</body></html>`;
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let pagePromise = BrowserTestUtils.browserLoaded(browser);
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BrowserTestUtils.loadURI(browser, testPage);
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await pagePromise;
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}
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// 7. Wait for 'content viewer evicted' event to go off
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await testDone.promise;
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// 8. Close the second tab
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BrowserTestUtils.removeTab(tab2);
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});
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});
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