playwright/test/focus.spec.js

/**
 * Copyright Microsoft Corporation. All rights reserved.
 *
 * 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.
 */

const {FFOX, CHROMIUM, LINUX, WEBKIT, MAC} = testOptions;

it('should work', async function({page, server}) {
  await page.setContent(`<div id=d1 tabIndex=0></div>`);
  expect(await page.evaluate(() => document.activeElement.nodeName)).toBe('BODY');
  await page.focus('#d1');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('d1');
});

it('should emit focus event', async function({page, server}) {
  await page.setContent(`<div id=d1 tabIndex=0></div>`);
  let focused = false;
  await page.exposeFunction('focusEvent', () => focused = true);
  await page.evaluate(() => d1.addEventListener('focus', focusEvent));
  await page.focus('#d1');
  expect(focused).toBe(true);
});

it('should emit blur event', async function({page, server}) {
  await page.setContent(`<div id=d1 tabIndex=0>DIV1</div><div id=d2 tabIndex=0>DIV2</div>`);
  await page.focus('#d1');
  let focused = false;
  let blurred = false;
  await page.exposeFunction('focusEvent', () => focused = true);
  await page.exposeFunction('blurEvent', () => blurred = true);
  await page.evaluate(() => d1.addEventListener('blur', blurEvent));
  await page.evaluate(() => d2.addEventListener('focus', focusEvent));
  await page.focus('#d2');
  expect(focused).toBe(true);
  expect(blurred).toBe(true);
});

it('should traverse focus', async function({page}) {
  await page.setContent(`<input id="i1"><input id="i2">`);
  let focused = false;
  await page.exposeFunction('focusEvent', () => focused = true);
  await page.evaluate(() => i2.addEventListener('focus', focusEvent));

  await page.focus('#i1');
  await page.keyboard.type("First");
  await page.keyboard.press("Tab");
  await page.keyboard.type("Last");

  expect(focused).toBe(true);
  expect(await page.$eval('#i1', e => e.value)).toBe('First');
  expect(await page.$eval('#i2', e => e.value)).toBe('Last');
});

it('should traverse focus in all directions', async function({page}) {
  await page.setContent(`<input value="1"><input value="2"><input value="3">`);
  await page.keyboard.press('Tab');
  expect(await page.evaluate(() => document.activeElement.value)).toBe('1');
  await page.keyboard.press('Tab');
  expect(await page.evaluate(() => document.activeElement.value)).toBe('2');
  await page.keyboard.press('Tab');
  expect(await page.evaluate(() => document.activeElement.value)).toBe('3');
  await page.keyboard.press('Shift+Tab');
  expect(await page.evaluate(() => document.activeElement.value)).toBe('2');
  await page.keyboard.press('Shift+Tab');
  expect(await page.evaluate(() => document.activeElement.value)).toBe('1');
});
// Chromium and WebKit both have settings for tab traversing all links, but 
// it is only on by default in WebKit.
it.skip(!MAC || !WEBKIT)('should traverse only form elements', async function({page}) {
  await page.setContent(`
    <input id="input-1">
    <button id="button">buttton</button>
    <a href id="link">link</a>
    <input id="input-2">
  `);
  await page.keyboard.press('Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('input-1');
  await page.keyboard.press('Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('input-2');
  await page.keyboard.press('Shift+Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('input-1');
  await page.keyboard.press('Alt+Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('button');
  await page.keyboard.press('Alt+Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('link');
  await page.keyboard.press('Alt+Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('input-2');
  await page.keyboard.press('Alt+Shift+Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('link');
  await page.keyboard.press('Alt+Shift+Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('button');
  await page.keyboard.press('Alt+Shift+Tab');
  expect(await page.evaluate(() => document.activeElement.id)).toBe('input-1');
});