playwright/test/waittask.spec.js

/**
 * Copyright 2018 Google Inc. All rights reserved.
 * Modifications copyright (c) Microsoft Corporation.
 *
 * 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 utils = require('./utils');

/**
 * @type {PageTestSuite}
 */
module.exports.describe = function({testRunner, expect, product, playwright, FFOX, CHROMIUM, WEBKIT}) {
  const {describe, xdescribe, fdescribe} = testRunner;
  const {it, fit, xit, dit} = testRunner;
  const {beforeAll, beforeEach, afterAll, afterEach} = testRunner;

  describe('Page.waitFor', function() {
    it('should wait for selector', async({page, server}) => {
      let found = false;
      const waitFor = page.waitFor('div').then(() => found = true);
      await page.goto(server.EMPTY_PAGE);
      expect(found).toBe(false);
      await page.goto(server.PREFIX + '/grid.html');
      await waitFor;
      expect(found).toBe(true);
    });
    it('should wait for an xpath', async({page, server}) => {
      let found = false;
      const waitFor = page.waitFor('//div').then(() => found = true);
      await page.goto(server.EMPTY_PAGE);
      expect(found).toBe(false);
      await page.goto(server.PREFIX + '/grid.html');
      await waitFor;
      expect(found).toBe(true);
    });
    it('should not allow you to select an element with single slash xpath', async({page, server}) => {
      await page.setContent(`<div>some text</div>`);
      let error = null;
      await page.waitFor('/html/body/div').catch(e => error = e);
      expect(error).toBeTruthy();
    });
    it('should timeout', async({page, server}) => {
      const startTime = Date.now();
      const timeout = 42;
      await page.waitFor(timeout);
      expect(Date.now() - startTime).not.toBeLessThan(timeout / 2);
    });
    it('should work with multiline body', async({page, server}) => {
      const result = await page.waitForFunction(`
        (() => true)()
      `);
      expect(await result.jsonValue()).toBe(true);
    });
    it('should wait for predicate', async({page, server}) => {
      await Promise.all([
        page.waitFor(() => window.innerWidth < 130), // Windows doesn't like windows below 120px wide
        page.setViewportSize({width: 10, height: 10}),
      ]);
    });
    it('should throw when unknown type', async({page, server}) => {
      let error = null;
      await page.waitFor({foo: 'bar'}).catch(e => error = e);
      expect(error.message).toContain('Unsupported target type');
    });
    it('should wait for predicate with arguments', async({page, server}) => {
      await page.waitFor((arg1, arg2) => arg1 !== arg2, {}, 1, 2);
    });
  });

  describe('Frame.waitForFunction', function() {
    it('should accept a string', async({page, server}) => {
      const watchdog = page.waitForFunction('window.__FOO === 1');
      await page.evaluate(() => window.__FOO = 1);
      await watchdog;
    });
    it('should work when resolved right before execution context disposal', async({page, server}) => {
      await page.addInitScript(() => window.__RELOADED = true);
      await page.waitForFunction(() => {
        if (!window.__RELOADED)
          window.location.reload();
        return true;
      });
    });
    it('should poll on interval', async({page, server}) => {
      const polling = 100;
      const timeDelta = await page.waitForFunction(() => {
        if (!window.__startTime) {
          window.__startTime = Date.now();
          return false;
        }
        return Date.now() - window.__startTime;
      }, {}, {polling});
      expect(timeDelta).not.toBeLessThan(polling);
    });
    it('should poll on mutation', async({page, server}) => {
      let success = false;
      const watchdog = page.waitForFunction(() => window.__FOO === 'hit', {}, {polling: 'mutation'})
          .then(() => success = true);
      await page.evaluate(() => window.__FOO = 'hit');
      expect(success).toBe(false);
      await page.evaluate(() => document.body.appendChild(document.createElement('div')));
      await watchdog;
    });
    it('should poll on raf', async({page, server}) => {
      const watchdog = page.waitForFunction(() => window.__FOO === 'hit', {}, {polling: 'raf'});
      await page.evaluate(() => window.__FOO = 'hit');
      await watchdog;
    });
    it.fail(FFOX)('should work with strict CSP policy', async({page, server}) => {
      server.setCSP('/empty.html', 'script-src ' + server.PREFIX);
      await page.goto(server.EMPTY_PAGE);
      let error = null;
      await Promise.all([
        page.waitForFunction(() => window.__FOO === 'hit', {}, {polling: 'raf'}).catch(e => error = e),
        page.evaluate(() => window.__FOO = 'hit')
      ]);
      expect(error).toBe(null);
    });
    it('should throw on bad polling value', async({page, server}) => {
      let error = null;
      try {
        await page.waitForFunction(() => !!document.body, {}, {polling: 'unknown'});
      } catch (e) {
        error = e;
      }
      expect(error).toBeTruthy();
      expect(error.message).toContain('polling');
    });
    it('should throw negative polling interval', async({page, server}) => {
      let error = null;
      try {
        await page.waitForFunction(() => !!document.body, {}, {polling: -10});
      } catch (e) {
        error = e;
      }
      expect(error).toBeTruthy();
      expect(error.message).toContain('Cannot poll with non-positive interval');
    });
    it('should return the success value as a JSHandle', async({page}) => {
      expect(await (await page.waitForFunction(() => 5)).jsonValue()).toBe(5);
    });
    it('should return the window as a success value', async({ page }) => {
      expect(await page.waitForFunction(() => window)).toBeTruthy();
    });
    it('should accept ElementHandle arguments', async({page}) => {
      await page.setContent('<div></div>');
      const div = await page.$('div');
      let resolved = false;
      const waitForFunction = page.waitForFunction(element => !element.parentElement, div).then(() => resolved = true);
      expect(resolved).toBe(false);
      await page.evaluate(element => element.remove(), div);
      await waitForFunction;
    });
    it('should respect timeout', async({page}) => {
      let error = null;
      await page.waitForFunction('false', {}, {timeout: 10}).catch(e => error = e);
      expect(error).toBeTruthy();
      expect(error.message).toContain('waiting for function failed: timeout');
      expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
    });
    it('should respect default timeout', async({page}) => {
      page.setDefaultTimeout(1);
      let error = null;
      await page.waitForFunction('false').catch(e => error = e);
      expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
      expect(error.message).toContain('waiting for function failed: timeout');
    });
    it('should disable timeout when its set to 0', async({page}) => {
      const watchdog = page.waitForFunction(() => {
        window.__counter = (window.__counter || 0) + 1;
        return window.__injected;
      }, {}, {timeout: 0, polling: 10});
      await page.waitForFunction(() => window.__counter > 10);
      await page.evaluate(() => window.__injected = true);
      await watchdog;
    });
    it('should survive cross-process navigation', async({page, server}) => {
      let fooFound = false;
      const waitForFunction = page.waitForFunction('window.__FOO === 1').then(() => fooFound = true);
      await page.goto(server.EMPTY_PAGE);
      expect(fooFound).toBe(false);
      await page.reload();
      expect(fooFound).toBe(false);
      await page.goto(server.CROSS_PROCESS_PREFIX + '/grid.html');
      expect(fooFound).toBe(false);
      await page.evaluate(() => window.__FOO = 1);
      await waitForFunction;
      expect(fooFound).toBe(true);
    });
    it('should survive navigations', async({page, server}) => {
      const watchdog = page.waitForFunction(() => window.__done);
      await page.goto(server.EMPTY_PAGE);
      await page.goto(server.PREFIX + '/consolelog.html');
      await page.evaluate(() => window.__done = true);
      await watchdog;
    });
  });

  describe('Frame.waitForSelector', function() {
    const addElement = tag => document.body.appendChild(document.createElement(tag));
    it('should immediately resolve promise if node exists', async({page, server}) => {
      await page.goto(server.EMPTY_PAGE);
      const frame = page.mainFrame();
      await frame.waitForSelector('*');
      await frame.evaluate(addElement, 'div');
      await frame.waitForSelector('div');
    });
    it('should work with removed MutationObserver', async({page, server}) => {
      await page.evaluate(() => delete window.MutationObserver);
      const [handle] = await Promise.all([
        page.waitForSelector('.zombo'),
        page.setContent(`<div class='zombo'>anything</div>`),
      ]);
      expect(await page.evaluate(x => x.textContent, handle)).toBe('anything');
    });
    it('should resolve promise when node is added', async({page, server}) => {
      await page.goto(server.EMPTY_PAGE);
      const frame = page.mainFrame();
      const watchdog = frame.waitForSelector('div');
      await frame.evaluate(addElement, 'br');
      await frame.evaluate(addElement, 'div');
      const eHandle = await watchdog;
      const tagName = await eHandle.getProperty('tagName').then(e => e.jsonValue());
      expect(tagName).toBe('DIV');
    });
    it('should work when node is added through innerHTML', async({page, server}) => {
      await page.goto(server.EMPTY_PAGE);
      const watchdog = page.waitForSelector('h3 div');
      await page.evaluate(addElement, 'span');
      await page.evaluate(() => document.querySelector('span').innerHTML = '<h3><div></div></h3>');
      await watchdog;
    });
    it('Page.$ waitFor is shortcut for main frame', async({page, server}) => {
      await page.goto(server.EMPTY_PAGE);
      await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      const otherFrame = page.frames()[1];
      const watchdog = page.waitForSelector('div');
      await otherFrame.evaluate(addElement, 'div');
      await page.evaluate(addElement, 'div');
      const eHandle = await watchdog;
      expect(await eHandle.ownerFrame()).toBe(page.mainFrame());
    });
    it('should run in specified frame', async({page, server}) => {
      await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      await utils.attachFrame(page, 'frame2', server.EMPTY_PAGE);
      const frame1 = page.frames()[1];
      const frame2 = page.frames()[2];
      const waitForSelectorPromise = frame2.waitForSelector('div');
      await frame1.evaluate(addElement, 'div');
      await frame2.evaluate(addElement, 'div');
      const eHandle = await waitForSelectorPromise;
      expect(await eHandle.ownerFrame()).toBe(frame2);
    });
    it('should throw when frame is detached', async({page, server}) => {
      await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      const frame = page.frames()[1];
      let waitError = null;
      const waitPromise = frame.waitForSelector('.box').catch(e => waitError = e);
      await utils.detachFrame(page, 'frame1');
      await waitPromise;
      expect(waitError).toBeTruthy();
      expect(waitError.message).toContain('waitForFunction failed: frame got detached.');
    });
    it('should survive cross-process navigation', async({page, server}) => {
      let boxFound = false;
      const waitForSelector = page.waitForSelector('.box').then(() => boxFound = true);
      await page.goto(server.EMPTY_PAGE);
      expect(boxFound).toBe(false);
      await page.reload();
      expect(boxFound).toBe(false);
      await page.goto(server.CROSS_PROCESS_PREFIX + '/grid.html');
      await waitForSelector;
      expect(boxFound).toBe(true);
    });
    it('should wait for visible', async({page, server}) => {
      let divFound = false;
      const waitForSelector = page.waitForSelector('div', { waitFor: 'visible' }).then(() => divFound = true);
      await page.setContent(`<div style='display: none; visibility: hidden;'>1</div>`);
      expect(divFound).toBe(false);
      await page.evaluate(() => document.querySelector('div').style.removeProperty('display'));
      expect(divFound).toBe(false);
      await page.evaluate(() => document.querySelector('div').style.removeProperty('visibility'));
      expect(await waitForSelector).toBe(true);
      expect(divFound).toBe(true);
    });
    it('should wait for visible recursively', async({page, server}) => {
      let divVisible = false;
      const waitForSelector = page.waitForSelector('div#inner', { waitFor: 'visible' }).then(() => divVisible = true);
      await page.setContent(`<div style='display: none; visibility: hidden;'><div id="inner">hi</div></div>`);
      expect(divVisible).toBe(false);
      await page.evaluate(() => document.querySelector('div').style.removeProperty('display'));
      expect(divVisible).toBe(false);
      await page.evaluate(() => document.querySelector('div').style.removeProperty('visibility'));
      expect(await waitForSelector).toBe(true);
      expect(divVisible).toBe(true);
    });
    it('hidden should wait for hidden', async({page, server}) => {
      let divHidden = false;
      await page.setContent(`<div style='display: block;'></div>`);
      const waitForSelector = page.waitForSelector('div', { waitFor: 'hidden' }).then(() => divHidden = true);
      await page.waitForSelector('div'); // do a round trip
      expect(divHidden).toBe(false);
      await page.evaluate(() => document.querySelector('div').style.setProperty('visibility', 'hidden'));
      expect(await waitForSelector).toBe(true);
      expect(divHidden).toBe(true);
    });
    it('hidden should wait for display: none', async({page, server}) => {
      let divHidden = false;
      await page.setContent(`<div style='display: block;'></div>`);
      const waitForSelector = page.waitForSelector('div', { waitFor: 'hidden' }).then(() => divHidden = true);
      await page.waitForSelector('div'); // do a round trip
      expect(divHidden).toBe(false);
      await page.evaluate(() => document.querySelector('div').style.setProperty('display', 'none'));
      expect(await waitForSelector).toBe(true);
      expect(divHidden).toBe(true);
    });
    it('hidden should wait for removal', async({page, server}) => {
      await page.setContent(`<div></div>`);
      let divRemoved = false;
      const waitForSelector = page.waitForSelector('div', { waitFor: 'hidden' }).then(() => divRemoved = true);
      await page.waitForSelector('div'); // do a round trip
      expect(divRemoved).toBe(false);
      await page.evaluate(() => document.querySelector('div').remove());
      expect(await waitForSelector).toBe(true);
      expect(divRemoved).toBe(true);
    });
    it('should return null if waiting to hide non-existing element', async({page, server}) => {
      const handle = await page.waitForSelector('non-existing', { waitFor: 'hidden' });
      expect(handle).toBe(null);
    });
    it('should respect timeout', async({page, server}) => {
      let error = null;
      await page.waitForSelector('div', { timeout: 10 }).catch(e => error = e);
      expect(error).toBeTruthy();
      expect(error.message).toContain('waiting for selector "div" failed: timeout');
      expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
    });
    it('should have an error message specifically for awaiting an element to be hidden', async({page, server}) => {
      await page.setContent(`<div></div>`);
      let error = null;
      await page.waitForSelector('div', { waitFor: 'hidden', timeout: 10 }).catch(e => error = e);
      expect(error).toBeTruthy();
      expect(error.message).toContain('waiting for selector "[hidden] div" failed: timeout');
    });
    it('should respond to node attribute mutation', async({page, server}) => {
      let divFound = false;
      const waitForSelector = page.waitForSelector('.zombo').then(() => divFound = true);
      await page.setContent(`<div class='notZombo'></div>`);
      expect(divFound).toBe(false);
      await page.evaluate(() => document.querySelector('div').className = 'zombo');
      expect(await waitForSelector).toBe(true);
    });
    it('should return the element handle', async({page, server}) => {
      const waitForSelector = page.waitForSelector('.zombo');
      await page.setContent(`<div class='zombo'>anything</div>`);
      expect(await page.evaluate(x => x.textContent, await waitForSelector)).toBe('anything');
    });
    it('should have correct stack trace for timeout', async({page, server}) => {
      let error;
      await page.waitForSelector('.zombo', { timeout: 10 }).catch(e => error = e);
      expect(error.stack).toContain('waittask.spec.js');
    });
    it('should throw for unknown waitFor option', async({page, server}) => {
      await page.setContent('<section>test</section>');
      const error = await page.waitForSelector('section', { waitFor: 'foo' }).catch(e => e);
      expect(error.message).toContain('Unsupported waitFor option');
    });
    it('should throw for visibility option', async({page, server}) => {
      await page.setContent('<section>test</section>');
      const error = await page.waitForSelector('section', { visibility: 'hidden' }).catch(e => e);
      expect(error.message).toBe('options.visibility is not supported, did you mean options.waitFor?');
    });
    it('should throw for true waitFor option', async({page, server}) => {
      await page.setContent('<section>test</section>');
      const error = await page.waitForSelector('section', { waitFor: true }).catch(e => e);
      expect(error.message).toContain('Unsupported waitFor option');
    });
    it('should throw for false waitFor option', async({page, server}) => {
      await page.setContent('<section>test</section>');
      const error = await page.waitForSelector('section', { waitFor: false }).catch(e => e);
      expect(error.message).toContain('Unsupported waitFor option');
    });
    it('should support >> selector syntax', async({page, server}) => {
      await page.goto(server.EMPTY_PAGE);
      const frame = page.mainFrame();
      const watchdog = frame.waitForSelector('css=div >> css=span');
      await frame.evaluate(addElement, 'br');
      await frame.evaluate(addElement, 'div');
      await frame.evaluate(() => document.querySelector('div').appendChild(document.createElement('span')));
      const eHandle = await watchdog;
      const tagName = await eHandle.getProperty('tagName').then(e => e.jsonValue());
      expect(tagName).toBe('SPAN');
    });
    it('should wait for detached if already detached', async({page, server}) => {
      await page.setContent('<section id="testAttribute">43543</section>');
      expect(await page.waitForSelector('css=div', { waitFor: 'detached'})).toBe(null);
    });
    it('should wait for detached', async({page, server}) => {
      await page.setContent('<section id="testAttribute"><div>43543</div></section>');
      let done = false;
      const waitFor = page.waitForSelector('css=div', { waitFor: 'detached'}).then(() => done = true);
      expect(done).toBe(false);
      await page.waitForSelector('css=section');
      expect(done).toBe(false);
      await page.$eval('div', div => div.remove());
      expect(await waitFor).toBe(true);
      expect(done).toBe(true);
    });
  });

  describe('Frame.waitForSelector xpath', function() {
    const addElement = tag => document.body.appendChild(document.createElement(tag));

    it('should support some fancy xpath', async({page, server}) => {
      await page.setContent(`<p>red herring</p><p>hello  world  </p>`);
      const waitForXPath = page.waitForSelector('//p[normalize-space(.)="hello world"]');
      expect(await page.evaluate(x => x.textContent, await waitForXPath)).toBe('hello  world  ');
    });
    it('should respect timeout', async({page}) => {
      let error = null;
      await page.waitForSelector('//div', { timeout: 10 }).catch(e => error = e);
      expect(error).toBeTruthy();
      expect(error.message).toContain('waiting for selector "//div" failed: timeout');
      expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
    });
    it('should run in specified frame', async({page, server}) => {
      await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      await utils.attachFrame(page, 'frame2', server.EMPTY_PAGE);
      const frame1 = page.frames()[1];
      const frame2 = page.frames()[2];
      const waitForXPathPromise = frame2.waitForSelector('//div');
      await frame1.evaluate(addElement, 'div');
      await frame2.evaluate(addElement, 'div');
      const eHandle = await waitForXPathPromise;
      expect(await eHandle.ownerFrame()).toBe(frame2);
    });
    it('should throw when frame is detached', async({page, server}) => {
      await utils.attachFrame(page, 'frame1', server.EMPTY_PAGE);
      const frame = page.frames()[1];
      let waitError = null;
      const waitPromise = frame.waitForSelector('//*[@class="box"]').catch(e => waitError = e);
      await utils.detachFrame(page, 'frame1');
      await waitPromise;
      expect(waitError).toBeTruthy();
      expect(waitError.message).toContain('waitForFunction failed: frame got detached.');
    });
    it('should return the element handle', async({page, server}) => {
      const waitForXPath = page.waitForSelector('//*[@class="zombo"]');
      await page.setContent(`<div class='zombo'>anything</div>`);
      expect(await page.evaluate(x => x.textContent, await waitForXPath)).toBe('anything');
    });
    it('should allow you to select an element with single slash', async({page, server}) => {
      await page.setContent(`<div>some text</div>`);
      const waitForXPath = page.waitForSelector('//html/body/div');
      expect(await page.evaluate(x => x.textContent, await waitForXPath)).toBe('some text');
    });
  });

};