python 中playwright怎么通过expect来断言
时间: 2024-06-09 12:11:23 浏览: 189
Playwright 是一个跨浏览器自动化测试工具,可以使用它的 expect 模块来断言测试结果是否符合预期。
具体来说,可以使用 expect 模块中的 toMatch 方法来验证一个字符串是否包含另一个字符串,例如:
```python
from playwright.sync_api import Playwright, sync_playwright
def test_example(pw: Playwright):
browser = pw.chromium.launch()
context = browser.new_context()
page = context.new_page()
page.goto('https://www.example.com')
title = page.title()
expect(title).toMatch('Example Domain')
browser.close()
```
在上面的例子中,我们使用 expect 模块的 toMatch 方法来检查页面标题是否包含字符串 'Example Domain',如果不包含,则会抛出 AssertionError 异常。
除了 toMatch 方法,还有许多其他的 expect 方法可以用来验证测试结果,如 toBe、toEqual、toBeCloseTo 等,具体使用方法可以参考 Playwright 的官方文档。
相关问题
python代码playwright库 expect_file_chooser()
`expect_file_chooser()`是Playwright库中的一个函数,用于模拟文件选择器的操作。它可以等待文件选择器弹出,并模拟用户选择文件的操作。
以下是使用`expect_file_chooser()`函数的示例代码:
```python
import asyncio
from playwright.async_api import Playwright, async_playwright
async def file_chooser_example(playwright: Playwright) -> None:
# Launch the browser
browser = await playwright.chromium.launch()
page = await browser.new_page()
# Navigate to a page with a file input element
await page.goto("https://www.example.com")
# Define a coroutine to handle the file chooser dialog
async def handle_file_chooser(dialog):
await dialog.set_files("./example.txt")
await dialog.accept()
# Listen for the file chooser dialog and handle it
page.on("filechooser", handle_file_chooser)
# Click the file input element to trigger the file chooser dialog
await page.click("#file-input")
# Wait for the file to be selected and uploaded
await page.wait_for_selector("#file-uploaded")
# Close the browser
await browser.close()
# Run the example
with async_playwright() as playwright:
asyncio.run(file_chooser_example(playwright))
```
该示例使用Playwright库启动一个Chromium浏览器实例,并在页面上找到一个文件输入元素。当用户单击该元素时,将弹出文件选择器对话框。`expect_file_chooser()`函数会等待该对话框出现并模拟用户选择文件的操作。然后,该示例会等待文件上传完成并关闭浏览器。
python代码 playwright库,expect点击后跳转网页
使用 Playwright 库,可以通过以下代码实现在浏览器中点击链接并跳转到相应的网页:
```python
import asyncio
from playwright.async_api import async_playwright
async def main():
async with async_playwright() as p:
browser = await p.chromium.launch()
page = await browser.new_page()
await page.goto('https://example.com')
await page.click('a') # 点击第一个链接
await page.wait_for_navigation() # 等待页面跳转完成
print(page.url) # 输出当前页面的 URL
await browser.close()
asyncio.run(main())
```
这段代码打开一个 Chromium 浏览器,访问 `https://example.com` 网址,然后模拟点击第一个链接,并等待页面跳转完成。最后输出当前页面的 URL。你可以根据自己的需要修改网址和链接的选择器。
阅读全文