polygerrit-ui/app/embed/diff/gr-diff-mode-selector/gr-diff-mode-selector_test.ts

/**
 * @license
 * Copyright 2018 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import '../../../test/common-test-setup';
import './gr-diff-mode-selector';
import {GrDiffModeSelector} from './gr-diff-mode-selector';
import {DiffViewMode} from '../../../constants/constants';
import {queryAndAssert, waitUntilObserved} from '../../../test/test-utils';
import {fixture, html, assert} from '@open-wc/testing';
import {wrapInProvider} from '../../../models/di-provider-element';
import {
  BrowserModel,
  browserModelToken,
} from '../../../models/browser/browser-model';
import {UserModel, userModelToken} from '../../../models/user/user-model';
import {createPreferences} from '../../../test/test-data-generators';
import {GrButton} from '../../../elements/shared/gr-button/gr-button';
import {testResolver} from '../../../test/common-test-setup';

suite('gr-diff-mode-selector tests', () => {
  let element: GrDiffModeSelector;
  let browserModel: BrowserModel;
  let userModel: UserModel;

  setup(async () => {
    userModel = testResolver(userModelToken);
    browserModel = new BrowserModel(userModel);
    element = (
      await fixture(
        wrapInProvider(
          html`<gr-diff-mode-selector></gr-diff-mode-selector>`,
          browserModelToken,
          browserModel
        )
      )
    ).querySelector('gr-diff-mode-selector')!;
  });

  test('renders side-by-side selected', async () => {
    userModel.setPreferences({
      ...createPreferences(),
      diff_view: DiffViewMode.SIDE_BY_SIDE,
    });
    await waitUntilObserved(
      browserModel.diffViewMode$,
      mode => mode === DiffViewMode.SIDE_BY_SIDE
    );

    assert.shadowDom.equal(
      element,
      /* HTML */ `
        <gr-tooltip-content has-tooltip="" title="Side-by-side diff">
          <gr-button
            id="sideBySideBtn"
            link=""
            class="selected"
            aria-disabled="false"
            aria-pressed="true"
            role="button"
            tabindex="0"
          >
            <gr-icon icon="view_column_2" filled></gr-icon>
          </gr-button>
        </gr-tooltip-content>
        <gr-tooltip-content has-tooltip title="Unified diff">
          <gr-button
            id="unifiedBtn"
            link=""
            role="button"
            aria-disabled="false"
            aria-pressed="false"
            tabindex="0"
          >
            <gr-icon filled icon="calendar_view_day"></gr-icon>
          </gr-button>
        </gr-tooltip-content>
      `
    );
  });

  test('renders unified selected', async () => {
    userModel.setPreferences({
      ...createPreferences(),
      diff_view: DiffViewMode.UNIFIED,
    });
    await waitUntilObserved(
      browserModel.diffViewMode$,
      mode => mode === DiffViewMode.UNIFIED
    );

    assert.shadowDom.equal(
      element,
      /* HTML */ `
        <gr-tooltip-content has-tooltip="" title="Side-by-side diff">
          <gr-button
            id="sideBySideBtn"
            link=""
            class=""
            aria-disabled="false"
            aria-pressed="false"
            role="button"
            tabindex="0"
          >
            <gr-icon icon="view_column_2" filled></gr-icon>
          </gr-button>
        </gr-tooltip-content>
        <gr-tooltip-content has-tooltip title="Unified diff">
          <gr-button
            id="unifiedBtn"
            link=""
            class="selected"
            role="button"
            aria-disabled="false"
            aria-pressed="true"
            tabindex="0"
          >
            <gr-icon icon="calendar_view_day" filled></gr-icon>
          </gr-button>
        </gr-tooltip-content>
      `
    );
  });

  test('set mode', async () => {
    browserModel.setScreenWidth(0);
    const saveStub = sinon.stub(userModel, 'updatePreferences');

    // Setting the mode initially does not save prefs.
    element.saveOnChange = true;
    queryAndAssert<GrButton>(element, 'gr-button#sideBySideBtn').click();
    await element.updateComplete;

    assert.isFalse(saveStub.called);

    // Setting the mode to itself does not save prefs.
    queryAndAssert<GrButton>(element, 'gr-button#sideBySideBtn').click();
    await element.updateComplete;

    assert.isFalse(saveStub.called);

    // Setting the mode to something else does not save prefs if saveOnChange
    // is false.
    element.saveOnChange = false;
    queryAndAssert<GrButton>(element, 'gr-button#unifiedBtn').click();
    await element.updateComplete;

    assert.isFalse(saveStub.called);

    // Setting the mode to something else does not save prefs if saveOnChange
    // is false.
    element.saveOnChange = true;
    queryAndAssert<GrButton>(element, 'gr-button#sideBySideBtn').click();
    await element.updateComplete;

    assert.isTrue(saveStub.calledOnce);
  });
});