最强自动化测试框架Playwright（26）-对话框

page.on('dialog')

playwright 框架可以监听dialog事件，不管你alert 什么时候弹出来，监听到事件就自动处理了。

当出现 JavaScript 对话框时发出，例如alert、prompt或。侦听器必须dialog.accept()或dialog.dismiss()对话框 - 否则页面将冻结等待对话框，并且单击等操作将永远不会完成。

page.on("dialog", handler)

from playwright.sync_api import sync_playwright

def handle_dialog(dialog):
    print(dialog.message)
    dialog.dismiss()

def run(playwright):
    chromium = playwright.chromium
    browser = chromium.launch(headless=False,slow_mo=1000)
    page = browser.new_page()
    page.goto("http://www.baidu.com")
    page.on("dialog", handle_dialog)
    page.evaluate("alert('1')")
    browser.close()

with sync_playwright() as playwright:
    run(playwright)

示例：

html页面如下

  
    
  
  
    
Confirm Dialog Example
    
Click the button below to display a confirm dialog:
    Click Me
    
    
  

 如下代码打开html页面，点击click me按钮，并接受confirm弹框，因为运行太快，我这里生成了一个trace文件，可以查看执行过程

from playwright.sync_api import sync_playwright, Dialog


def handle_dialog(dialog:Dialog):
    print(dialog.message)
    dialog.accept()

def run(playwright):
    chromium = playwright.chromium
    browser = chromium.launch(headless=False)

    context = browser.new_context()
    context.tracing.start(screenshots=True, snapshots=True, sources=True)
    page = context.new_page()
    page.goto(r"C:\log.html")
    page.get_by_text("Click Me").click()
    page.on("dialog", handle_dialog)
    context.tracing.stop(path="trace.zip")
    browser.close()


with sync_playwright() as playwright:
    run(playwright)

 由trace view可以看到，自动执行了两次dialog.dismiss

 即使handle_dialog方法里什么都不写，有监听事件，也会自动执行dislog.dismiss。

方法

accept()

dialog.accept()
dialog.accept(**kwargs)

dismiss()

在对话框关闭时返回。

dialog.dismiss() 

属性

default_value

如果对话框为提示，则返回默认提示值。否则，返回空字符串。 

dialog.default_value 

message

对话框中显示的消息。

dialog.message 

page

启动此对话框的页面（如果可用）。

dialog.page 

type

返回对话框类型alert、beforeunload、confirm、prompt

dialog.type