common.test.ts

// Copyright 2020 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.

import {createElement, createTextChild, Overlay} from './common.js';

describe('common helper', () => {
  it('can create DOM elements', () => {
    assert.instanceOf(createElement('div', 'test'), HTMLDivElement);
  });

  it('exposes DOM manipulation methods on DOM elements', () => {
    const wrapper = document.createElement('div');

    assert.isTrue(Boolean(wrapper.createChild), 'createChild is available on DOM elements');
    const child = wrapper.createChild('span', 'child');

    assert.instanceOf(child, HTMLSpanElement, 'The right span element got created');
    assert.strictEqual(child.className, 'child', 'The right className got set');

    const textChild = createTextChild(wrapper, 'hello world');

    assert.instanceOf(textChild, Text, 'The right text node got created');
    assert.strictEqual(textChild.textContent, 'hello world', 'The right text content got set');

    assert.isTrue(Boolean(wrapper.removeChildren), 'removeChildren is available on DOM elements');
    wrapper.removeChildren();

    assert.strictEqual(wrapper.childElementCount, 0, 'All children got removed');
  });

  it('sets the right platform', () => {
    const overlay = new Overlay(window);
    const platform = 'mac';
    overlay.setPlatform(platform);
    assert.isTrue(document.body.classList.contains(`platform-${platform}`));
  });
});