unit-testing - 在plone 5中运行bin/test时找不到实用程序

在plone 5中，我创建一个名为IFindMathModeTexInText的接口，并使用five.grok注册一个全局实用程序，如下所示：

class FindMathModeTexInText (grok.GlobalUtility):
    implements (IFindMathModeTexInText)
    def process(self, text):
        equation_indices, all_indices = find_equation(text)
        return create_list_of_text_nodes(text, equation_indices, all_indices)

我在不同的模块中使用IFindMathModeTexInText调用了zope.component.getUtility，如下所示：

result = getUtility(IFindMathModeTexInText).process(new_el_text)

运行bin/instance fg时我没有问题
但是，当我运行bin/test时，出现以下错误：

in getUtility
    raise ComponentLookupError(interface, name)
ComponentLookupError: (<InterfaceClass nti.content.util.common_interfaces.IFindMathModeTexInText>, '')

我了解，如果找不到实用程序，将引发ComponentLookupError。为什么在运行bin.test时会出现此错误，而在运行bin/instance fg时会找到实用程序。

ps：完整的回溯如下：

Error in test test_html_header (nti.content.tools.tests.test_html_to_latex.TestHTMLToLatex)
Traceback (most recent call last):
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/buildout-cache/eggs/unittest2-0.5.1-py2.7.egg/unittest2/case.py", line 340, in run
    testMethod()
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/sources/nti.content/nti/content/tools/tests/test_html_to_latex.py", line 31, in test_html_header
    node = RichText.process(script, reading_type = True)
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/sources/nti.content/nti/content/tools/html_adapter/rich_text_adapter.py", line 21, in process
    me.add_child(Run.process(element,[],reading_type))
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/sources/nti.content/nti/content/tools/html_adapter/run_html_adapter.py", line 25, in process
    me = check_child(me, element, reading_type)
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/sources/nti.content/nti/content/tools/html_adapter/run_html_adapter.py", line 322, in check_child
    me.add_child(_process_h1_elements(child,reading_type))
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/sources/nti.content/nti/content/tools/html_adapter/run_html_adapter.py", line 393, in _process_h1_elements
    return Paragraph.process(element, ['Heading1'], reading_type)
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/sources/nti.content/nti/content/tools/html_adapter/run_html_adapter.py", line 39, in process
    me = check_element_text(me, element)
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/sources/nti.content/nti/content/tools/html_adapter/run_html_adapter.py", line 287, in check_element_text
    list_of_child_nodes = getUtility(IFindMathModeTexInText).process(new_el_text)
  File "/Users/ega/CCMF/PloneCourseContentCMF/PloneCourseContentCMF-Buildout/buildout-cache/eggs/zope.component-3.9.5-py2.7.egg/zope/component/_api.py", line 169, in getUtility
    raise ComponentLookupError(interface, name)
ComponentLookupError: (<InterfaceClass nti.content.util.common_interfaces.IFindMathModeTexInText>, '')

谢谢

最佳答案

我通过定义plone.app.testing documentation中记录的单元测试层解决了这个问题。