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如何对 Django-CMS 扩展进行单元测试？

发布于 2024-08-28 05:50:04 字数 90 浏览 5 评论 0原文

我正在尝试为我正在开发的 Django-CMS 实现获取一些测试覆盖率，但我不确定如何对插件/扩展进行单元测试。以前有人这样做过吗？如果是，怎么做的？一些例子会很棒。

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初见终念 2024-09-04 05:50:04

cms/tests/plugins.py 所示的测试更像是集成测试而不是单元测试，这是相当重量级的，有时需要整个系统的很大一部分启动和运行（不一定是错误的），只是在调试时不切实际）。

DjangoCMS 是紧密集成的，所以我这里有一些“更接近金属”的技术，而不是一个完整的解决方案：

你需要一个 'Expando' 风格的假类：

class Expando(object): # Never use in production!
    def __init__(self, **kw):
        self.__dict__.update(kw)

要实例化你的插件类的实例：

from cms.plugin_pool import plugin_pool

# ..in production code: class YourPlugin(CMSPlugin)...

# This ensures that the system is aware of your plugin:
YrPluginCls = plugin_pool.plugins.get('YourPlugin', None)

# ..instantiate:
plugin = YrPluginCls()

健全性检查插件 .render 方法：

ctx = plugin.render({}, Expando(attr1='a1', attr2=123), None)

使用实际模板渲染，检查输出：

res = render_to_response(look.render_template, ctx)
# assert that attr1 exist in res if it should
# ..same for attr2

BeautifulSoup 在验证小 DOM 片段的内容时很方便。

使用管理表单字段间接检查模型属性是否正确运行：

from django.test.client import RequestFactory
from django.contrib.auth.models import AnonymousUser

# ...

request = RequestFactory().get('/')
request.user = AnonymousUser()
a_field = plugin.get_form(request).base_fields['a_field']
a_field.validate('<some valid value>')
# Check that a_field.validate('<some invalid value>') raises

Tests as shown by cms/tests/plugins.py is rather integration tests than unit tests, and that's quite heavy-weight and requires a sometimes too large part of the entire system up and running (not neccessary wrong, just impractical when debugging).

DjangoCMS is tightly integrated so what I have here are a few techniques to get 'closer to the metal' rather than a complete solution:

You need an 'Expando' -style fake class:

class Expando(object): # Never use in production!
    def __init__(self, **kw):
        self.__dict__.update(kw)

To instantiate an instance of your plugin class:

from cms.plugin_pool import plugin_pool

# ..in production code: class YourPlugin(CMSPlugin)...

# This ensures that the system is aware of your plugin:
YrPluginCls = plugin_pool.plugins.get('YourPlugin', None)

# ..instantiate:
plugin = YrPluginCls()

Sanity check the plugins .render method:

ctx = plugin.render({}, Expando(attr1='a1', attr2=123), None)

Render with actual template, check output:

res = render_to_response(look.render_template, ctx)
# assert that attr1 exist in res if it should
# ..same for attr2

BeautifulSoup is handy when validating content of small DOM fragments.

Use admin form fields to indirectly check that model attributes behave correctly:

from django.test.client import RequestFactory
from django.contrib.auth.models import AnonymousUser

# ...

request = RequestFactory().get('/')
request.user = AnonymousUser()
a_field = plugin.get_form(request).base_fields['a_field']
a_field.validate('<some valid value>')
# Check that a_field.validate('<some invalid value>') raises

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