BDD - Python Behave Runner Script

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BDD - Python Behave Runner Script

引言
Runner Script
- subprocess.run 调用 Behave 命令行
- 调用 Behave 提供的 API behave_main

引言

通过终端命令执行 Behave 测试用例，有时 IDE 重启了，还得重新敲一遍命令，很是麻烦，说实话我都懒得记那些命令选项，于是我就想是否找个偷懒办法，当然是可以的，我们可以创建一个 Runner 脚本文件，每次运行这个脚本文件就可以了。

想了解更多 Behave 相关的文章，欢迎阅读《Python BDD Behave 系列》，持续更新中。

Runner Script

首先在 features 文件夹同级目录创建一个 runner.py 文件。代码实现有两种，一种利用 subprocess.run 直接执行 Behave 的命令行参数，另外一种就是使用 Behave 提供的API behave_main ，而不是直接调用其命令行工具。

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subprocess.run 调用 Behave 命令行

定义一个 run_behave 方法，用来构建 Behave 命令选项，通过 subprocess.run 执行 Behave 命令。调用 run_behave 方法只需传需要的参数就可以了。

例如：运行 BDD/Features/tag_example 下，标签为 @cart 的测试用例，允许终端 Print 输出，同时生成 html 测试报告，就可以这样调用了
run_behave(feature = “BDD/Features/tag_example”, tags = “cart”, no_capture= True, html_report= True)

import subprocessdef run_behave(feature, tags, no_capture, html_report):behave_command = ["behave"]# Include feature if providedif feature:behave_command.append(feature)# Include tags if providedif tags:behave_command.extend(["--tags", tags])# Include --no-capture optionif no_capture:behave_command.append("--no-capture")  # Include html reportif html_report:behave_command.extend(["-f", "behave_html_formatter:HTMLFormatter","-o", "BDD/output/report.html"])     try:subprocess.run(behave_command, check=True)except subprocess.CalledProcessError as e:print(f"Behave execution failed. Return code: {e.returncode}")# Handle the error or raise an exception if neededif __name__ == "__main__":run_behave(feature = "BDD/Features/tag_example",tags = "cart",no_capture= True,html_report= True)

终端输出，这里有一些 hooks 输出：

PS C:\Automation\Test> & C:/Users/xxx/AppData/Local/Programs/Python/Python39/python.exe c:/Automation/Test/BDD/runner.py
Before all tests
Before feature: Shopping Cart and Order Process
Before tag: cart
Before tag: smoke
Before scenario: Guest user adds items to the cart
Before step: the user is on the home page
After step: the user is on the home page
Before step: the user adds an item to the cart
After step: the user adds an item to the cart
Before step: the user should see the item in the cart
After step: the user should see the item in the cart
After scenario: Guest user adds items to the cart
After tag: cart
After tag: smokeBefore tag: cart
Before tag: regression
Before scenario: Registered user removes items from the cart
Before step: the user is logged in
After step: the user is logged in
Before step: the user has items in the cart
After step: the user has items in the cart
Before step: the user removes an item from the cart
After step: the user removes an item from the cart
Before step: the user should see the updated cart
After step: the user should see the updated cart
After scenario: Registered user removes items from the cart
After tag: cart
After tag: regressionAfter feature: Shopping Cart and Order Process
After all tests
1 feature passed, 0 failed, 0 skipped
2 scenarios passed, 0 failed, 2 skipped
7 steps passed, 0 failed, 9 skipped, 0 undefined
Took 0m0.005s

Html 报告：
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调用 Behave 提供的 API behave_main

定义一个 run_behave 方法，构建 Behave 参数，通过 behave_main.run_behave 传参来执行测试用例。
这里需要注意一下 behave 1.2.6 版本会有异常：AttributeError: 'list' object has no attribute 'version'
据说 behave 1.2.5 没有问题，小伙伴们可以试一下。

# runner.pyfrom behave import __main__ as behave_maindef run_behave(features_path='features', tags=None):# 构建 Behave 参数behave_args = [features_path]# 添加标签过滤if tags:behave_args.extend(['--tags', tags])# 使用 Behave API 运行测试behave_main.run_behave(behave_args)if __name__ == "__main__":# 你可以在这里设置默认的 features_path 和 tagsdefault_features_path = 'BDD/Features/tag_example'default_tags = None# 运行 Behave 测试run_behave(features_path=default_features_path, tags=default_tags)

终端输出：

PS C:\Automation\Test> & C:/Users/xxx/AppData/Local/Programs/Python/Python39/python.exe c:/Automation/Test/BDD/runner.py
Traceback (most recent call last):File "c:\Automation\Test\BDD\runner.py", line 22, in <module>run_behave(features_path=default_features_path, tags=default_tags)File "c:\Automation\Test\BDD\runner.py", line 14, in run_behavebehave_main.run_behave(behave_args)File "C:\Users\xxx\AppData\Local\Programs\Python\Python39\lib\site-packages\behave\__main__.py", line 67, in run_behaveif config.version:
AttributeError: 'list' object has no attribute 'version'
PS C:\Automation\Test> Behave --version
behave 1.2.6