fune/browser/base/content/test/about/browser_aboutHome_search_suggestion.js

/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

ignoreAllUncaughtExceptions();

add_task(async function() {
  // See browser_contentSearchUI.js for comprehensive content search UI tests.
  info("Search suggestion smoke test");

  await BrowserTestUtils.withNewTab({ gBrowser, url: "about:home" }, async function(browser) {
    // Add a test engine that provides suggestions and switch to it.
    let currEngine = Services.search.currentEngine;
    let engine = await promiseNewEngine("searchSuggestionEngine.xml");
    let p = promiseContentSearchChange(browser, engine.name);
    Services.search.currentEngine = engine;
    await p;

    await ContentTask.spawn(browser, null, async function() {
      // Type an X in the search input.
      let input = content.document.querySelector(["#searchText", "#newtab-search-text"]);
      input.focus();
    });

    await BrowserTestUtils.synthesizeKey("x", {}, browser);

    await ContentTask.spawn(browser, null, async function() {
      // Wait for the search suggestions to become visible.
      let table = content.document.getElementById("searchSuggestionTable");
      let input = content.document.querySelector(["#searchText", "#newtab-search-text"]);

      await new Promise(resolve => {
        let observer = new content.MutationObserver(() => {
          if (input.getAttribute("aria-expanded") == "true") {
            observer.disconnect();
            ok(!table.hidden, "Search suggestion table unhidden");
            resolve();
          }
        });
        observer.observe(input, {
          attributes: true,
          attributeFilter: ["aria-expanded"],
        });
      });
    });

    // Empty the search input, causing the suggestions to be hidden.
    await BrowserTestUtils.synthesizeKey("a", { accelKey: true }, browser);
    await BrowserTestUtils.synthesizeKey("VK_DELETE", {}, browser);

    await ContentTask.spawn(browser, null, async function() {
      let table = content.document.getElementById("searchSuggestionTable");
      await ContentTaskUtils.waitForCondition(() => table.hidden,
        "Search suggestion table hidden");
    });

    Services.search.currentEngine = currEngine;
    try {
      Services.search.removeEngine(engine);
    } catch (ex) { }
  });
});