feat(firefox): implement Page.touchscreen (puppeteer#4070)

experimental/puppeteer-firefox/lib/DOMWorld.js

@@ -319,6 +319,16 @@ class DOMWorld {
     }, values);
   }
 
+  /**
+   * @param {string} selector
+   */
+  async tap(selector) {
+    const handle = await this.$(selector);
+    assert(handle, 'No node found for selector: ' + selector);
+    await handle.tap();
+    await handle.dispose();
+  }
+
   /**
    * @param {string} selector
    * @param {string} text

experimental/puppeteer-firefox/lib/FrameManager.js

@@ -253,6 +253,13 @@ class Frame {
     return this._mainWorld.click(selector, options);
   }
 
+  /**
+   * @param {string} selector
+   */
+  async tap(selector) {
+    return this._mainWorld.tap(selector);
+  }
+
   /**
    * @param {string} selector
    * @param {string} text

experimental/puppeteer-firefox/lib/Input.js

@@ -292,4 +292,43 @@ class Mouse {
   }
 }
 
-module.exports = { Keyboard, Mouse };
+class Touchscreen {
+  /**
+   * @param {Puppeteer.JugglerSession} client
+   * @param {Keyboard} keyboard
+   * @param {Mouse} mouse
+   */
+  constructor(client, keyboard, mouse) {
+    this._client = client;
+    this._keyboard = keyboard;
+    this._mouse = mouse;
+  }
+
+  /**
+   * @param {number} x
+   * @param {number} y
+   */
+  async tap(x, y) {
+    const touchPoints = [{x: Math.round(x), y: Math.round(y)}];
+    let {defaultPrevented} = (await this._client.send('Page.dispatchTouchEvent', {
+      type: 'touchStart',
+      touchPoints,
+      modifiers: this._keyboard._modifiers
+    }));
+    defaultPrevented = (await this._client.send('Page.dispatchTouchEvent', {
+      type: 'touchEnd',
+      touchPoints,
+      modifiers: this._keyboard._modifiers
+    })).defaultPrevented || defaultPrevented;
+    // Do not dispatch related mouse events if either of touch events
+    // were prevented.
+    // See https://developer.mozilla.org/en-US/docs/Web/API/Touch_events/Supporting_both_TouchEvent_and_MouseEvent#Event_order
+    if (defaultPrevented)
+      return;
+    await this._mouse.move(x, y);
+    await this._mouse.down();
+    await this._mouse.up();
+  }
+}
+
+module.exports = { Keyboard, Mouse, Touchscreen };

experimental/puppeteer-firefox/lib/JSHandle.js

@@ -332,6 +332,12 @@ class ElementHandle extends JSHandle {
     await this._frame._page.mouse.click(x, y, options);
   }
 
+  async tap() {
+    await this._scrollIntoViewIfNeeded();
+    const {x, y} = await this._clickablePoint();
+    await this._frame._page.touchscreen.tap(x, y);
+  }
+
   /**
    * @param {!Array<string>} filePaths
    */

experimental/puppeteer-firefox/lib/Page.js

@@ -1,5 +1,5 @@
 const {helper, debugError, assert} = require('./helper');
-const {Keyboard, Mouse} = require('./Input');
+const {Keyboard, Mouse, Touchscreen} = require('./Input');
 const {Dialog} = require('./Dialog');
 const {TimeoutError} = require('./Errors');
 const fs = require('fs');
@@ -46,6 +46,7 @@ class Page extends EventEmitter {
     this._target = target;
     this._keyboard = new Keyboard(session);
     this._mouse = new Mouse(session, this._keyboard);
+    this._touchscreen = new Touchscreen(session, this._keyboard, this._mouse);
     this._closed = false;
     /** @type {!Map<string, Function>} */
     this._pageBindings = new Map();
@@ -337,6 +338,10 @@ class Page extends EventEmitter {
     return this._mouse;
   }
 
+  get touchscreen(){
+    return this._touchscreen;
+  }
+
   /**
    * @param {!{timeout?: number, waitUntil?: string|!Array<string>}} options
    */
@@ -505,6 +510,13 @@ class Page extends EventEmitter {
     return await this._frameManager.mainFrame().click(selector, options);
   }
 
+  /**
+   * @param {string} selector
+   */
+  tap(selector) {
+    return this.mainFrame().tap(selector);
+  }
+
   /**
    * @param {string} selector
    * @param {string} text

experimental/puppeteer-firefox/lib/api.js

@@ -16,5 +16,6 @@ module.exports = {
   Response: require('./NetworkManager').Response,
   SecurityDetails: require('./NetworkManager').SecurityDetails,
   Target: require('./Browser').Target,
+  Touchscreen: require('./Input').Touchscreen,
   TimeoutError: require('./Errors').TimeoutError,
 };

experimental/puppeteer-firefox/package.json

@@ -9,7 +9,7 @@
     "node": ">=8.9.4"
   },
   "puppeteer": {
-    "firefox_revision": "764023af0aa07d232984dec6bc81d9e904f25ddb"
+    "firefox_revision": "6237be74b2870ab50cc165b9d5be46a85091674f"
   },
   "scripts": {
     "install": "node install.js",

test/touchscreen.spec.js

@@ -14,17 +14,20 @@
  * limitations under the License.
  */
 
-module.exports.addTests = function({testRunner, expect}) {
+module.exports.addTests = function({testRunner, expect, DeviceDescriptors}) {
   const {describe, xdescribe, fdescribe} = testRunner;
   const {it, fit, xit, it_fails_ffox} = testRunner;
+  const iPhone = DeviceDescriptors['iPhone 6'];
   const {beforeAll, beforeEach, afterAll, afterEach} = testRunner;
   describe('Touchscreen', function() {
-    it_fails_ffox('should tap the button', async({page, server}) => {
+    it('should tap the button', async({page, server}) => {
+      await page.emulate(iPhone);
       await page.goto(server.PREFIX + '/input/button.html');
       await page.tap('button');
       expect(await page.evaluate(() => result)).toBe('Clicked');
     });
-    xit('should report touches', async({page, server}) => {
+    it('should report touches', async({page, server}) => {
+      await page.emulate(iPhone);
       await page.goto(server.PREFIX + '/input/touches.html');
       const button = await page.$('button');
       await button.tap();