chrome/test/data/webui/app_management/reducers_test.js

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

suite('app state', function() {
  let apps;
  let action;

  function createApp(id, config) {
    return app_management.FakePageHandler.createApp(id, config);
  }

  setup(function() {
    // Create an initial AppMap.
    apps = {
      '1': createApp('1'),
      '2': createApp('2'),
    };
  });

  test('updates when apps are added', function() {
    appsToAdd = [
      createApp('3', {type: 1, title: 'a'}),
      createApp('4'),
    ];

    action = app_management.actions.addApps(appsToAdd);
    apps = app_management.AppState.updateApps(apps, action);

    // Check that apps contains a key for each app id.
    assertTrue(!!apps['1']);
    assertTrue(!!apps['2']);
    assertTrue(!!apps['3']);
    assertTrue(!!apps['4']);

    // Check that id corresponds to the right app.
    const app = apps['3'];
    assertEquals('3', app.id);
    assertEquals(1, app.type);
    assertEquals('a', app.title);
  });

  test('updates when an app is changed', function() {
    const changedApp = createApp('2', {type: 1, title: 'a'});
    action = app_management.actions.changeApp(changedApp);
    apps = app_management.AppState.updateApps(apps, action);

    // Check that app has changed
    const app = apps['2'];
    assertEquals(1, app.type);
    assertEquals('a', app.title);

    // Check that number of apps hasn't changed
    assertEquals(Object.keys(apps).length, 2);
  });

  test('updates when an app is removed', function() {
    action = app_management.actions.removeApp('1');
    apps = app_management.AppState.updateApps(apps, action);

    // Check that app is removed
    assertFalse(!!apps['1']);

    // Check that other app is unaffected
    assertTrue(!!apps['2']);
  });
});