如何在 puppeteer 中模拟拖放动作?
Posted
技术标签:
【中文标题】如何在 puppeteer 中模拟拖放动作?【英文标题】:How to simulate a drag and drop action in puppeteer? 【发布时间】:2018-09-21 04:26:55 【问题描述】:我的应用程序中有 React-DnD(拖放)。我想对它进行 E2E 测试。
我想要模拟的是拖动特定元素并拖放到特定位置。我该怎么做?
我拥有的是:
//test.js
const mouse = page.mouse;
await mouse.down();
await mouse.move(126, 19);
await page.waitFor(400);
使用此代码,选择完成,但拖动不起作用。我应该如何实现这个?
【问题讨论】:
你在寻找这样的东西吗github.com/GoogleChrome/puppeteer/issues/1366 但这对我不起作用。 你试过这个pastebin.com/2rttzMW1 吗? 是的。但它也没有解决我的问题 @Khushi 对此有何更新?你设法解决了这个问题吗? 【参考方案1】:以下方法将允许您在 Puppeteer 中模拟拖放操作:
const example = await page.$('#example');
const bounding_box = await example.boundingBox();
await page.mouse.move(bounding_box.x + bounding_box.width / 2, bounding_box.y + bounding_box.height / 2);
await page.mouse.down();
await page.mouse.move(126, 19);
await page.mouse.up();
【讨论】:
【参考方案2】:没有一个 Puppeteer 特定的解决方案对我有用,所以我最终将本机 javascript 写入一个文件并将其导入 Puppeteer(在我的例子中是 Jest)。
拖放.js
async function dragAndDrop(source, target)
await page.evaluate((source, target) =>
source = document.querySelector('#'+source);
event = document.createEvent("CustomEvent");
event.initCustomEvent("mousedown", true, true, null);
event.clientX = source.getBoundingClientRect().top;
event.clientY = source.getBoundingClientRect().left;
source.dispatchEvent(event);
event = document.createEvent("CustomEvent");
event.initCustomEvent("dragstart", true, true, null);
event.clientX = source.getBoundingClientRect().top;
event.clientY = source.getBoundingClientRect().left;
source.dispatchEvent(event);
event = document.createEvent("CustomEvent");
event.initCustomEvent("drag", true, true, null);
event.clientX = source.getBoundingClientRect().top;
event.clientY = source.getBoundingClientRect().left;
source.dispatchEvent(event);
target = document.querySelector('#'+target);
event = document.createEvent("CustomEvent");
event.initCustomEvent("dragover", true, true, null);
event.clientX = target.getBoundingClientRect().top;
event.clientY = target.getBoundingClientRect().left;
target.dispatchEvent(event);
event = document.createEvent("CustomEvent");
event.initCustomEvent("drop", true, true, null);
event.clientX = target.getBoundingClientRect().top;
event.clientY = target.getBoundingClientRect().left;
target.dispatchEvent(event);
event = document.createEvent("CustomEvent");
event.initCustomEvent("dragend", true, true, null);
event.clientX = target.getBoundingClientRect().top;
event.clientY = target.getBoundingClientRect().left;
target.dispatchEvent(event);
, source, target);
test.js
const dragAndDrop = require('./drag-and-drop')
describe('when dragging and dropping todo', () =>
it('should change order on DOM', async () =>
const firstTodo = await page.evaluate(() => document.querySelectorAll('.input-container .input')[0].id);
const secondTodo = await page.evaluate(() => document.querySelectorAll('.input-container .input')[1].id);
dragAndDrop(firstTodo, secondTodo);
const newFirstTodo = await page.evaluate(() => document.querySelectorAll('.input-container .input')[0].id);
const newSecondTodo = await page.evaluate(() => document.querySelectorAll('.input-container .input')[1].id);
expect(newFirstTodo).toEqual(secondTodo)
expect(newSecondTodo).toEqual(firstTodo)
);
);
比内置的 Puppeteer 功能稍微多一些工作,但希望对于需要更多控制拖放的其他人来说,这是一个足够简单的复制和粘贴解决方案。
【讨论】:
clientX 和 clientY 与 getBoundingClientRect().top 交换并离开,但一旦我解决了这个问题,这对我有用,谢谢!! 完美运行,唯一缺少的是事件上的 dataTransfer 对象【参考方案3】:这是我在 puppeteer 中用于拖放的 sn-p:
//This assumes only one element will be found for selectors you provide, otherwise there's ambiguity on which element was selected.
//In my code I'm throwing on more than 1 element found
async dragAndDrop(page, originSelector, destinationSelector)
await page.waitForSelector(originSelector)
await page.waitForSelector(destinationSelector)
const origin = await page.$(originSelector)
const destination = await page.$(destinationSelector)
const ob = await origin.boundingBox()
const db = await destination.boundingBox()
console.log(`Dragging from $ob.x + ob.width / 2, $ob.y + ob.height / 2`)
await page.mouse.move(ob.x + ob.width / 2, ob.y + ob.height / 2)
await page.mouse.down()
console.log(`Dropping at $db.x + db.width / 2, $db.y + db.height / 2`)
await page.mouse.move(db.x + db.width / 2, db.y + db.height / 2)
await page.mouse.up()
请注意,在 puppeteer 中对拖放的支持仍然是 not fully 实现的。
【讨论】:
【参考方案4】:如果这些示例对您不起作用,则可能是另一个时间问题。我玩了一段时间,直到这对我有用。 请注意鼠标命令之间的 50 毫秒等待和增加的步数,这会产生更多的移动/拖动事件并且似乎有所作为。
// drag node
let elm = await (await page.waitForSelector("#mynode", visible: true ));
let bounding_box = await elm.boundingBox();
let x = bounding_box.x + bounding_box.width / 2;
let y = bounding_box.y + bounding_box.height / 2;
await page.mouse.move(x, y);
await page.mouse.down();
await page.waitForTimeout(50);
await page.mouse.move(x + 100, y, steps: 10 );
await page.waitForTimeout(50);
await page.mouse.up();
await page.waitForTimeout(50);
await page.screenshot( path: 'after-drag.png' );
【讨论】:
以上是关于如何在 puppeteer 中模拟拖放动作?的主要内容,如果未能解决你的问题,请参考以下文章
如何在 Selenium Webdriver 中模拟 HTML5 拖放?