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Istanbul 覆盖率收集 for Playwright Python,类似 @canyonjs/playwright

Project description

canyonjs-playwright-python

@canyonjs/playwright 的 Python 实现,为 Playwright Python 提供 Istanbul 覆盖率收集能力。

安装

pip install canyonjs-playwright

或从源码安装(开发模式):

pip install -e .

用法

方式一:pytest_plugins(推荐,类似 baseTest.ts)

conftest.py 中添加一行即可自动启用,所有使用 page 的测试都会自动收集覆盖率:

# conftest.py
pytest_plugins = ["canyonjs_playwright.pytest_plugin"]

测试用例无需修改,直接使用 page

def test_example(page):
    page.goto("https://example.com")
    assert "Example" in page.title()

方式二:自定义输出目录

# conftest.py
import os
os.environ["CANYON_OUTPUT_DIR"] = ".canyon_output"
pytest_plugins = ["canyonjs_playwright.pytest_plugin"]

方式三:手动使用 fixture

# conftest.py
from canyonjs_playwright import create_coverage_context_fixture

coverage_context = create_coverage_context_fixture(output_dir=".canyon_output")
# test_example.py
def test_example(page, coverage_context):
    page.goto("https://example.com")

运行步骤

1. 创建虚拟环境(推荐)

python3 -m venv venv
source venv/bin/activate   # macOS/Linux
# Windows: venv\Scripts\activate

2. 安装依赖

python -m pip install -r requirements.txt

3. 安装 Chromium 浏览器

python -m playwright install chromium

4. 运行测试

python -m pytest

可选参数

参数 说明
--headed 有界面模式运行(显示浏览器窗口)
-v 详细输出
--tracing=retain-on-failure 失败时保留 trace 便于调试

项目结构

canyonjs-playwright-python/
├── src/
│   └── canyonjs_playwright/    # 包源码
│       ├── __init__.py
│       ├── fixtures.py
│       └── pytest_plugin.py
├── tests/
│   ├── conftest.py
│   ├── test_baidu.py
│   └── test_canyon.py
├── pyproject.toml
├── requirements.txt
├── pytest.ini
└── .github/workflows/
    └── playwright.yml

输出

覆盖率数据写入 coverage-{timestamp}.json,默认目录为 .canyon_output

注意:仅当被测页面有 Istanbul 注入的 window.__coverage__ 时才会生成覆盖率文件。

依赖

  • Python >= 3.8
  • playwright >= 1.40.0
  • pytest-playwright >= 0.4.0

CI

推送到 GitHub 后,GitHub Actions 会自动运行测试。失败时可在 Actions 页面下载 trace 文件,在 trace.playwright.dev 查看。

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