browser_jsterm_autocomplete_accept_no_scroll.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Test that the accepting an autocompletion does not scroll the input.

const TEST_URI = `data:text/html;charset=utf-8,<!DOCTYPE html>

  <script>

    /* Create a prototype-less object so popup does not contain native

     * Object prototype properties.

*/

    window.foobar = Object.create(null, Object.getOwnPropertyDescriptors({

      item0: "value0",

      item1: "value1",

    }));

  </script>`;

add_task(async function () {

  const hud = await openNewTabAndConsole(TEST_URI);

  const { jsterm, ui } = hud;

  const { autocompletePopup: popup } = jsterm;

  info("Insert multiple new lines so the input overflows");

  const onPopUpOpen = popup.once("popup-opened");

  const lines = "\n".repeat(200);

  setInputValue(hud, lines);

  info("Fire the autocompletion popup");

  EventUtils.sendString("window.foobar.");

  await onPopUpOpen;

  const scrollableEl = ui.window.document.querySelector(".CodeMirror-scroll");

  Assert.greater(scrollableEl.scrollTop, 0, "The input overflows");

  const scrollTop = scrollableEl.scrollTop;

  info("Hit Enter to accept the autocompletion");

  const onPopupClose = popup.once("popup-closed");

  EventUtils.synthesizeKey("KEY_Enter");

  await onPopupClose;

  ok(!popup.isOpen, "popup is not open after KEY_Enter");

is(

    getInputValue(hud),

    lines + "window.foobar.item0",

    "completion was successful after KEY_Enter"

);

is(

    scrollableEl.scrollTop,

    scrollTop,

    "The scrolling position stayed the same when accepting the completion"

);

});