test_providersManager_maxResults.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 test_maxResults() {

  const MATCHES_LENGTH = 20;

  let matches = [];

  for (let i = 0; i < MATCHES_LENGTH; i++) {

    matches.push(

      new UrlbarResult(

        UrlbarUtils.RESULT_TYPE.TAB_SWITCH,

        UrlbarUtils.RESULT_SOURCE.TABS,

        { url: `http://mozilla.org/foo/${i}` }

);

  let provider = registerBasicTestProvider(matches);

  let context = createContext(undefined, { providers: [provider.name] });

  let controller = UrlbarTestUtils.newMockController();

  async function test_count(count) {

    let promise = promiseControllerNotification(controller, "onQueryFinished");

    context.maxResults = count;

    await controller.startQuery(context);

    await promise;

    Assert.equal(

      context.results.length,

      Math.min(MATCHES_LENGTH, count),

      "Check count"

);

    Assert.deepEqual(context.results, matches.slice(0, count), "Check results");

  await test_count(10);

  await test_count(1);

  await test_count(30);

});