1.简介

本文主要介绍两个在测试过程中可能会用到的功能：在selenium中介绍了Actions类中的拖拽操作和Actions类中的划取字段操作。例如：需要在一堆log字符中随机划取一段文字，然后右键选择摘取功能。playwright同样可以实现元素的拖拽和释放的操作。

2.拖拽操作

鼠标拖拽操作，顾名思义就是：就是鼠标按住将一个元素拖拽到另一个元素上。拖拽是指将某个元素从一个位置拖动到另一个位置。为了模拟这种操作，Playwright 提供了 DragToAsync 方法，它可以帮助我们轻松地完成拖拽功能。

2.1基础知识

1.按住元素从页面的一个位置拖动到另外一个位置，有2种方式可以实现：

locator.drag_to(target: locator) 先定位元素，调用drag_to方法到目标元素
page.drag_and_drop(source: str, target: str) page对象直接调用

2.拖动和释放操作

page.drag_and_drop可以实现通过page对象调用drag_and_drop ,部分源码如下：

def drag_and_drop(self,source: str,target: str,*,source_position: typing.Optional[Position] = None,target_position: typing.Optional[Position] = None,force: typing.Optional[bool] = None,no_wait_after: typing.Optional[bool] = None,timeout: typing.Optional[float] = None,strict: typing.Optional[bool] = None,trial: typing.Optional[bool] = None) -> None:"""Page.drag_and_dropThis method drags the source element to the target element. It will first move to the source element, perform a`mousedown`, then move to the target element and perform a `mouseup`.**Usage**```pyawait page.drag_and_drop(\"#source\", \"#target\")# or specify exact positions relative to the top-left corners of the elements:await page.drag_and_drop(\"#source\",\"#target\",source_position={\"x\": 34, \"y\": 7},target_position={\"x\": 10, \"y\": 20})``````pypage.drag_and_drop(\"#source\", \"#target\")# or specify exact positions relative to the top-left corners of the elements:page.drag_and_drop(\"#source\",\"#target\",source_position={\"x\": 34, \"y\": 7},target_position={\"x\": 10, \"y\": 20})```

注：source 和 target 是字符串格式，也就是传selector 选择器的方法

3.拖拽操作

locator.drag_to()可以实现拖放操作，该操作将：

• 将鼠标悬停在要拖动的元素上
• 按鼠标左键
• 将鼠标移动到将接收放置的元素
• 松开鼠标左键

语法示例：

page.locator("#item-to-be-dragged").drag_to(page.locator("#item-to-drop-at"))

手工拖拽：

locator.hover()、mouse.down()、mouse.move()、mouse.up()

语法示例：

page.locator("#item-to-be-dragged").hover()
page.mouse.down()
page.locator("#item-to-drop-at").hover()
page.mouse.up()

3.牛刀小试

学习过Playwright的拖拽基础知识后，我们趁热打铁将其实践一下，以为我们更好的理解和记忆。这里JqueryUI网站的一个拖拽demo实战一下。

3.1拖拽操作

使用locator.drag_to()执行拖放操作，实现自动化测试。

3.1.1代码设计

3.1.2参考代码

# coding=utf-8🔥
# 1.导入模块
from playwright.sync_api import Playwright, sync_playwright, expectdef run(playwright: Playwright) -> None:browser = playwright.chromium.launch(headless=False)context = browser.new_context()page = context.new_page()page.goto("https://jqueryui.com/resources/demos/droppable/default.html")page.wait_for_timeout(1000)page.locator("#draggable").drag_to(page.locator("#droppable"))page.wait_for_timeout(3000)# page.pause()# page.drag_and_drop('#dragger', 'text=Item 2')context.close()browser.close()with sync_playwright() as playwright:run(playwright)

3.1.3运行代码

1.运行代码，右键Run'Test'

2.运行代码后电脑端的浏览器的动作。如下图所示：

3.2拖动和释放操作

使用page.drag_and_drop(locator, loacator)，实现自动化测试。

3.2.1代码设计

3.2.2参考代码

# coding=utf-8🔥
# 1.导入模块
from playwright.sync_api import Playwright, sync_playwright, expectdef run(playwright: Playwright) -> None:browser = playwright.chromium.launch(headless=False)context = browser.new_context()page = context.new_page()page.goto("https://jqueryui.com/resources/demos/droppable/default.html")page.wait_for_timeout(1000)# page.locator("#draggable").drag_to(page.locator("#droppable"))page.drag_and_drop('#draggable', '#droppable')page.wait_for_timeout(3000)# page.pause()context.close()browser.close()with sync_playwright() as playwright:run(playwright)

3.2.3运行代码

1.运行代码，右键Run'Test'：

3.3手工拖拽

想精确控制拖动操作，可以使用较低级别的手工方法，如locator.hover()、mouse.down()、mouse.move()和mouse.up()。来实现自动化测试。

3.1代码设计

3.2参考代码

# coding=utf-8🔥
# 1.导入模块
from playwright.sync_api import Playwright, sync_playwright, expectdef run(playwright: Playwright) -> None:browser = playwright.chromium.launch(headless=False)context = browser.new_context()page = context.new_page()page.goto("https://jqueryui.com/resources/demos/droppable/default.html")page.wait_for_timeout(1000)page.locator('#draggable').hover()page.mouse.down()page.locator('#droppable').hover()page.mouse.up()page.wait_for_timeout(3000)# page.pause()context.close()browser.close()with sync_playwright() as playwright:run(playwright)

3.3运行代码

1.运行代码，右键Run'Test'

2.运行代码后电脑端的浏览器的动作。如下图所示：

4.小结

由于网络的原因，有时可以访问到jquery UI的网页的demo，有时又不可以，在网上找了半天又找到一个网址：Sahi Tests 里边有很多在线免费的demo供大家学习使用。有兴趣的同学可以找到里边的拖拽demo来巩固一下今天学习的知识。