Coverage.py在子目录中没有init.py文件的情况下无法发现测试 [英] Coverage.py does not discover tests without init.py file in sub directories

问题描述

当我运行python的coverage时，我总是需要在tests子目录中有一个空的__init__.py文件来获取覆盖率以运行测试.这是python2软件包的要求，但不是python3的要求.为了进行复制，我做了以下工作(前提条件是python3，pip3和brew):

When I run coverage for python, I always need an empty __init__.py file in the tests sub-directory to get coverage to run the tests. This is a requirement for python2 packages, but not for python3. To reproduce, I did the following (pre-requisites are python3, pip3 and brew):

1. 运行以下终端命令:

1. Run the following terminal command:

pip3 install coverage

创建以下目录结构:

Create the following directory structure:

example\
    example.py
tests\
    test_example.py

example.py:

example.py:

#!/usr/bin/env python3
class Example:
    value = 3

    def update(self):
        self.value = 4

test_example.py:

test_example.py:

#!/usr/bin/env python3

import unittest
from example.example import Example

class TestExample(unittest.TestCase):
    def test_example(self):
        example_object = Example()
        self.assertEqual(3, example_object.value)
        example_object.update()
        self.assertEqual(4, example_object.value)

1. 运行以下终端命令:

1. Run the following terminal command:

coverage run --branch -m unittest discover -s . && coverage report

我应该得到:Ran 1 test in x.yz seconds，但是我总是得到Ran 0 tests in x.yz seconds，并且要解决此问题，我必须将__init__.py文件添加到两个目录中.如何在不需要初始化文件的情况下进行覆盖?

I should get: Ran 1 test in x.yz seconds, but I always get Ran 0 tests in x.yz seconds, and to fix this, I have to add __init__.py files to both directories. How can I run coverage without needing the init files?

如果您有其他需要解决的问题，请告诉我.我将不胜感激！

Please let me know if you need anything else from me regarding this question. I would appreciate any help!

推荐答案

尽管Python 3不需要__init__.py文件，但忽略它们会创建名称空间包，如果不需要它们，这不是一个好主意.例如，它们是最后读取的，因此，即使以后在PYTHONPATH中的目录也可以隐藏文件.

Although Python 3 doesn't need __init__.py files, omitting them creates namespace packages, which are not a good idea if you don't need them. For example, they are read last, so even directories later in the PYTHONPATH can shadow your files.

您仍然应该创建__init__.py文件.

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