browser_webconsole_object_inspector_scroll.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Check that expanding an objectInspector node doesn't alter the output scroll position.

const TEST_URI =

  "data:text/html;charset=utf8,<!DOCTYPE html>test Object Inspector";

add_task(async function () {

  const hud = await openNewTabAndConsole(TEST_URI);

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

    content.wrappedJSObject.console.log(

      "oi-test",

      content.wrappedJSObject.Math

);

});

  const node = await waitFor(() => findConsoleAPIMessage(hud, "oi-test"));

  const objectInspector = node.querySelector(".tree");

  let onOiMutation = waitForNodeMutation(objectInspector, {

    childList: true,

});

  info("Expanding the object inspector");

  objectInspector.querySelector(".arrow").click();

  await onOiMutation;

  const nodes = objectInspector.querySelectorAll(".node");

  const lastNode = nodes[nodes.length - 1];

  info("Scroll the last node of the ObjectInspector into view");

  lastNode.scrollIntoView();

  const outputContainer = hud.ui.outputNode.querySelector(".webconsole-output");

  ok(hasVerticalOverflow(outputContainer), "There is a vertical overflow");

  const scrollTop = outputContainer.scrollTop;

  onOiMutation = waitForNodeMutation(objectInspector, {

    childList: true,

});

  info("Expand the last node");

  const view = lastNode.ownerDocument.defaultView;

  EventUtils.synthesizeMouseAtCenter(lastNode, {}, view);

  await onOiMutation;

is(

    scrollTop,

    outputContainer.scrollTop,

    "Scroll position did not changed when expanding a node"

);

});

function hasVerticalOverflow(container) {

  return container.scrollHeight > container.clientHeight;