browser_tab_discard.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Verify RDM closes synchronously when tabs are discarded.

const TEST_URL = "https://example.com/";

addRDMTask(

  null,

  async function () {

    const tab = await addTab(TEST_URL);

    const { ui } = await openRDM(tab);

    await waitForDeviceAndViewportState(ui);

    const clientClosed = waitForClientClose(ui);

    closeRDM(tab, {

      reason: "TabBrowserDiscarded",

});

    // This flag is set at the end of `ResponsiveUI.destroy`.  If it is true

    // without waiting for `closeRDM` above, then we must have closed

    // synchronously.

    is(ui.destroyed, true, "RDM closed synchronously");

    await clientClosed;

    await removeTab(tab);

},

  { onlyPrefAndTask: true }

);

addRDMTask(

  null,

  async function () {

    const tab = await addTab(TEST_URL);

    const { ui } = await openRDM(tab);

    await waitForDeviceAndViewportState(ui);

    const clientClosed = waitForClientClose(ui);

    // If the tab is selected, it is not allowed to be discarded.

    info("Create another tab to deselect the tab to discard");

    const tab2 = await addTab(TEST_URL);

    info("Discard the initial tab");

    gBrowser.discardBrowser(tab);

    // This flag is set at the end of `ResponsiveUI.destroy`.  If it is true without

    // waiting for `closeRDM` itself and only removing the tab, then we must have closed

    // synchronously in response to tab closing.

    is(ui.destroyed, true, "RDM closed synchronously");

    await clientClosed;

    await removeTab(tab);

    await removeTab(tab2);

},

  { onlyPrefAndTask: true }

);