browser_jsterm_autocomplete_null.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

add_task(async function () {

  await pushPref("devtools.chrome.enabled", true);

  await addTab("about:blank");

  info(`Open browser console with ctrl-shift-j`);

  // we're using the browser console so we can check for error messages that would be

  // caused by console code.

  const opened = waitForBrowserConsole();

  EventUtils.synthesizeKey("j", { accelKey: true, shiftKey: true }, window);

  const hud = await opened;

  const { jsterm } = hud;

  const { autocompletePopup: popup } = jsterm;

  info(`Clear existing messages`);

  const onMessagesCleared = hud.ui.once("messages-cleared");

  await clearOutput(hud);

  await onMessagesCleared;

  info(`Create a null variable`);

  // Using the commands directly as we don't want to impact the UI state.

  await hud.commands.scriptCommand.execute("globalThis.nullVar = null");

  info(`Check completion suggestions for "null"`);

  await setInputValueForAutocompletion(hud, "null");

  ok(popup.isOpen, "popup is open");

  const expectedPopupItems = ["null", "nullVar"];

ok(

    hasExactPopupLabels(popup, expectedPopupItems),

    "popup has expected items"

);

  info(`Check completion suggestions for "null."`);

  let onAutocompleteUpdated = jsterm.once("autocomplete-updated");

  EventUtils.sendString(".", hud.iframeWindow);

  await onAutocompleteUpdated;

  is(popup.itemCount, 0, "popup has no items");

  info(`Check completion suggestions for "null"`);

  onAutocompleteUpdated = jsterm.once("autocomplete-updated");

  EventUtils.synthesizeKey("KEY_Backspace", undefined, hud.iframeWindow);

  await onAutocompleteUpdated;

  is(popup.itemCount, 2, "popup has 2 items");

  info(`Check completion suggestions for "nullVar"`);

  onAutocompleteUpdated = jsterm.once("autocomplete-updated");

  EventUtils.sendString("Var.", hud.iframeWindow);

  await onAutocompleteUpdated;

  is(popup.itemCount, 0, "popup has no items");

  is(popup.isOpen, false, "popup is closed");

  info(`Check that no error was logged`);

  await waitFor(() => findErrorMessage(hud, "", ":not(.network)")).then(

    message => {

      ok(false, `Got error ${JSON.stringify(message.textContent)}`);

},

    error => {

      if (!error.message.includes("Failed waitFor")) {

        throw error;

      ok(true, `No error was logged`);

);

  info(`Cleanup`);

  await hud.commands.scriptCommand.execute("delete globalThis.nullVar");

});