通过从Python中的另一个文件调用文件来对文件进行单元测试

Question

I am new to unnitest module. I have a file that has unittest in it. The file is something like ...

File1.py

class ABC (unittest.TestCase):
    def setUp(self):
        # Do some work here

    def test_123(self, a,b,c):
        # Do some work here

if __name__ == "__main__":
unittest.main()

* Now I am calling this file from another file by passing values to the function "test_123".* But python displays the following error. Could anybody please help!

Traceback (most recent call last):
File "caller_file.py", line 20, in <module>
r = file1.ABC()
File "/usr/lib/python2.7/unittest/case.py", line 191, in __init__
(self.__class__, methodName))
ValueError: no such test method in <class 'file1.ABC'>: runTest

Answer 1

You can run file1.ABC test case like this:

import unittest
import file1

suite = unittest.TestLoader().loadTestsFromTestCase(file1.ABC)
unittest.TextTestRunner(verbosity=2).run(suite)

Also you need to add the self argument to the setUp and test_123 methods and self should be the sole argument.

Answer 2

I run into similar problems with my unittests because missing entries in search path for modules.

I solved it by creating

my_env = os.environ.copy()
        if not 'PYTHONPATH' in my_env:
            my_env['PYTHONPATH'] = ''

        my_env['PYTHONPATH'] += ';' + ';'.join(
                                    [os.path.abspath('.'),
                                    os.path.abspath('..'),
                                    os.path.abspath('..\\..')])

and then the call of the file

_ = subprocess.check_output(filepath, shell=True, env=my_env)

I just added the current path environment because the calling-file is in the same directories. Maybe you have to adjust that.