polygerrit-ui/app/styles/themes/dark-theme_test.js

/**
 * @license
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import '../../test/common-test-setup-karma.js';
import {applyTheme, removeTheme} from './dark-theme.js';

suite('dark-theme_test.js', () => {
  test('apply and remove theme', () => {
    applyTheme();
    assert.equal(document.head.querySelectorAll('#dark-theme').length, 1);
    removeTheme();
    assert.equal(document.head.querySelectorAll('#dark-theme').length, 0);
  });
});