/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

add_task(async function testClosedTabData() {
  /** Test for Bug 461634 **/

  const REMEMBER = Date.now(),
    FORGET = Math.random();
  let test_state = {
    windows: [
      {
        tabs: [{ entries: [] }],
        _closedTabs: [
          {
            state: { entries: [{ url: "http://www.example.net/" }] },
            title: FORGET,
          },
          {
            state: { entries: [{ url: "http://www.example.net/" }] },
            title: REMEMBER,
          },
          {
            state: { entries: [{ url: "http://www.example.net/" }] },
            title: FORGET,
          },
          {
            state: { entries: [{ url: "http://www.example.net/" }] },
            title: REMEMBER,
          },
        ],
      },
    ],
  };
  let remember_count = 2;

  function countByTitle(aClosedTabList, aTitle) {
    return aClosedTabList.filter(aData => aData.title == aTitle).length;
  }

  function testForError(aFunction) {
    try {
      aFunction();
      return false;
    } catch (ex) {
      return ex.name == "NS_ERROR_ILLEGAL_VALUE";
    }
  }

  // Open a window and add the above closed tab list.
  let newWin = openDialog(location, "", "chrome,all,dialog=no");
  await promiseWindowLoaded(newWin);

  Services.prefs.setIntPref(
    "browser.sessionstore.max_tabs_undo",
    test_state.windows[0]._closedTabs.length
  );
  await setWindowState(newWin, test_state);

  let closedTabs = SessionStore.getClosedTabDataForWindow(newWin);

  // Verify that non JSON serialized data is the same as JSON serialized data.
  is(
    JSON.stringify(closedTabs),
    JSON.stringify(SessionStore.getClosedTabDataForWindow(newWin)),
    "Non-serialized data is the same as serialized data"
  );

  is(
    closedTabs.length,
    test_state.windows[0]._closedTabs.length,
    "Closed tab list has the expected length"
  );
  is(
    countByTitle(closedTabs, FORGET),
    test_state.windows[0]._closedTabs.length - remember_count,
    "The correct amout of tabs are to be forgotten"
  );
  is(
    countByTitle(closedTabs, REMEMBER),
    remember_count,
    "Everything is set up"
  );

  // All of the following calls with illegal arguments should throw NS_ERROR_ILLEGAL_VALUE.
  ok(
    testForError(() => ss.forgetClosedTab({}, 0)),
    "Invalid window for forgetClosedTab throws"
  );
  ok(
    testForError(() => ss.forgetClosedTab(newWin, -1)),
    "Invalid tab for forgetClosedTab throws"
  );
  ok(
    testForError(() =>
      ss.forgetClosedTab(newWin, test_state.windows[0]._closedTabs.length + 1)
    ),
    "Invalid tab for forgetClosedTab throws"
  );

  // Remove third tab, then first tab.
  ss.forgetClosedTab(newWin, 2);
  ss.forgetClosedTab(newWin, null);

  closedTabs = SessionStore.getClosedTabDataForWindow(newWin);

  // Verify that non JSON serialized data is the same as JSON serialized data.
  is(
    JSON.stringify(closedTabs),
    JSON.stringify(SessionStore.getClosedTabDataForWindow(newWin)),
    "Non-serialized data is the same as serialized data"
  );

  is(
    closedTabs.length,
    remember_count,
    "The correct amout of tabs was removed"
  );
  is(
    countByTitle(closedTabs, FORGET),
    0,
    "All tabs specifically forgotten were indeed removed"
  );
  is(
    countByTitle(closedTabs, REMEMBER),
    remember_count,
    "... and tabs not specifically forgetten weren't"
  );

  // Clean up.
  Services.prefs.clearUserPref("browser.sessionstore.max_tabs_undo");
  await BrowserTestUtils.closeWindow(newWin);
});