browser_dbg-slow-script.js

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/* 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/>. */

"use strict";

// Tests the slow script warning

add_task(async function openDebuggerFirst() {

  // This test fails with pending vsync at end of test without fission, not EFT

  if (!isFissionEnabled() && !isEveryFrameTargetEnabled()) {

    return;

  // In mochitest, the timeout is disable, so set it to a short, but non zero duration

  await pushPref("dom.max_script_run_time", 1);

  // Prevents having to click on the page to have the dialog to appear

  await pushPref("dom.max_script_run_time.require_critical_input", false);

  const dbg = await initDebugger("doc-slow-script.html");

  const alert = BrowserTestUtils.waitForGlobalNotificationBar(

    window,

    "process-hang"

);

  info("Execute an infinite loop");

  invokeInTab("infiniteLoop");

  info("Wait for the slow script warning");

  const notification = await alert;

  info("Click on the debug script button");

  const buttons = notification.buttonContainer.getElementsByTagName("button");

  // The first button is "stop", the second is "debug script"

  buttons[1].click();

  info("Waiting for the debugger to be paused");

  await waitForPaused(dbg);

  const source = findSource(dbg, "doc-slow-script.html");

  await assertPausedAtSourceAndLine(dbg, source.id, 14);

  info("Close toolbox and tab");

  await dbg.toolbox.closeToolbox();

  await removeTab(gBrowser.selectedTab);

});

add_task(async function openDebuggerFromDialog() {

  // This test fails with pending vsync at end of test without fission, not EFT

  if (!isFissionEnabled() && !isEveryFrameTargetEnabled()) {

    return;

  const tab = await addTab(EXAMPLE_URL + "doc-slow-script.html");

  const alert = BrowserTestUtils.waitForGlobalNotificationBar(

    window,

    "process-hang"

);

  // /!\ Hack this attribute in order to force showing the "debug script" button

  //     on all channels. Otherwise it is only displayed in dev edition.

  tab.linkedBrowser.browsingContext.watchedByDevTools = true;

  info("Execute an infinite loop");

  // Note that spawn will return a promise that may be rejected because of the infinite loop

  // And mochitest may consider this as an error. So ignore any rejection.

  SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {

    content.wrappedJSObject.infiniteLoop();

  }).catch(() => {});

  info("Wait for the slow script warning");

  const notification = await alert;

  info("Click on the debug script button");

  const buttons = notification.buttonContainer.getElementsByTagName("button");

  // The first button is "stop", the second is "debug script"

  buttons[1].click();

  info("Wait for the toolbox to appear and have the debugger initialized");

  await waitFor(async () => {

    const tb = gDevTools.getToolboxForTab(gBrowser.selectedTab);

    if (tb) {

      await tb.getPanelWhenReady("jsdebugger");

      return true;

    return false;

});

  const toolbox = gDevTools.getToolboxForTab(gBrowser.selectedTab);

  ok(toolbox, "Got a toolbox");

  const dbg = createDebuggerContext(toolbox);

  info("Waiting for the debugger to be paused");

  await waitForPaused(dbg);

  const source = findSource(dbg, "doc-slow-script.html");

  await assertPausedAtSourceAndLine(dbg, source.id, 14);

  info("Close toolbox and tab");

  await dbg.toolbox.closeToolbox();

  await removeTab(gBrowser.selectedTab);

});