browser/components/sessionstore/test/browser_581937.js


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// Tests that an about:blank tab with no history will not be saved into
// session store and thus, it will not show up in Recently Closed Tabs.

"use strict";

add_task(async function () {
  let tab = BrowserTestUtils.addTab(gBrowser, "about:blank");
  await promiseBrowserLoaded(tab.linkedBrowser);

  is(
    tab.linkedBrowser.currentURI.spec,
    "about:blank",
    "we will be removing an about:blank tab"
  );

  let r = `rand-${Math.random()}`;
  ss.setCustomTabValue(tab, "foobar", r);

  await promiseRemoveTabAndSessionState(tab);
  let closedTabData = ss.getClosedTabDataForWindow(window);
  ok(!closedTabData.includes(r), "tab not stored in _closedTabs");
});