运行测试

时间:2017-10-18 12:47:35

标签: python pytest

我有一个像这样的文件夹结构:

api
-- test
    -- test_api.py
    -- __init__.py
-- api
    -- api.py
    -- __init__.py
    -- sub
        -- sub.py
        -- __init__.py

sub.py

Base = 'base'

api.py

from sub.sub import Base

def stuff_to_test():     通

test_api.py

from api.api import stuff_to_test

def test_stuff_to_test():
    stuff_to_test()

我在目录api中。 我运行pytest

==================================== ERRORS ====================================
______________________ ERROR collecting tests/test_api.py ______________________
ImportError while importing test module '/<somepath>/api/tests/test_api.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
tests/test_api.py:1: in <module>
    from ..api.api import stuff_to_test
api/__init__.py:1: in <module>
    from . import api
api/api.py:1: in <module>
    from sub.sub import Base
E   ImportError: No module named 'sub'
!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!
=========================== 1 error in 0.08 seconds ============================

如果我运行python解释器并从test_api.py导入内容,也会发生同样的情况:

>>> from tests.test_api import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/<somepath>/api/tests/test_api.py", line 1, in <module>
    from api.api import stuff_to_test
  File "/<somepath>/api/api/__init__.py", line 1, in <module>
    from . import api
  File "/<somepath>/api/api/api.py", line 1, in <module>
    from sub.sub import Base
ImportError: No module named 'sub'

我的第一个想法是在api.py亲属进行导入:

from .sub.sub import Base

这样测试运行正常。 但如果我运行python api/api.py,我会收到此错误:

Traceback (most recent call last):
  File "api/api.py", line 1, in <module>
    from .sub.sub import Base
SystemError: Parent module '' not loaded, cannot perform relative import

我怎样才能运行测试并运行应用程序?

2 个答案:

答案 0 :(得分:1)

在python中,有两种方法可以导入模块,具有相对路径或绝对路径。 当您编写BuildImage时,您正在进行绝对路径导入,对于相对路径导入写入from sub.sub import Base

绝对路径导入请查看PYTHONPATH以查找导入的起点,因此您应该写from .sub.sub import Base

有关详细信息:Absolute vs. explicit relative import of Python module

答案 1 :(得分:0)

我通过将以下内容添加到test.__init__.py

来解决了这个问题
project_path = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
api_path= os.path.join(project_path, 'api')
sys.path.append(api_path)