python playwright pytest 源码

首先，需要安装 Python 的 Playwright 和 pytest 扩展：

pip install playwright pytest-playwright

然后，在 Python 中编写测试用例，使用 Playwright 进行浏览器自动化测试。以下是一个简单的示例：

import pytest
from playwright.sync_api import Playwright, Browser, BrowserContext, Page

@pytest.fixture(scope="session")
def playwright() -> Playwright:
    with Playwright() as playwright:
        yield playwright

@pytest.fixture(scope="session")
def browser(playwright: Playwright) -> Browser:
    with playwright.chromium.launch(headless=True) as browser:
        yield browser

@pytest.fixture(scope="session")
def context(browser: Browser) -> BrowserContext:
    with browser.new_context() as context:
        yield context

@pytest.fixture(scope="session")
def page(context: BrowserContext) -> Page:
    with context.new_page() as page:
        yield page

def test_playwright(page: Page):
    page.goto("https://www.google.com")
    assert page.title() == "Google"
    search_input = page.locator("[name='q']")
    search_input.fill("Playwright")
    search_input.press("Enter")
    assert page.title() == "Playwright - Google Search"

在这个示例中，我们定义了四个 fixture，分别是：

- `playwright`：Playwright 实例，用于创建浏览器实例。
- `browser`：浏览器实例，用于创建上下文。
- `context`：浏览器上下文，用于创建页面实例。
- `page`：页面实例，用于进行测试操作。

在测试函数 `test_playwright` 中，我们使用 Playwright 进行浏览器自动化测试。我们首先打开谷歌搜索页面，然后在搜索框中输入 `Playwright` 并按下回车键。最后，我们断言页面标题是否为 `Playwright - Google Search`。

最后，我们可以使用 pytest 运行测试：

pytest test_playwright.py