python nose `ValueError: no such test method in <class 'my_test.check_error_test'>: runTest`

Question

I have a working test suite that runs with Nose.

I recently realized I needed to add things to my overall setUp(), as triggered by a variable found in each individual test (the variable gets updated by our version control system).

I have added an __init__() to my BaseTest.py and my individual test. However, I get ValueError: no such test method in <class 'my_test.check_error_test'>: runTest

From googling, it looks like this has to do with a unittest loader. But Nose always took care of all of the loaders before.

I'm guessing this has to do with the fact that I am touching the methodName attribute after Nose sets it, but I cannot figure out what I should be setting it to, ESPECIALLY since I use various Nose Plugins. Or perhaps there's a better way. What do I need to do differently?

BaseTest.py

import unittest

class BaseTest(unittest.TestCase):
    def __init__(self, methodName='runTest', p4rev=None):
        super(BaseTest, self).__init__(methodName)
        self.p4rev = p4rev

    def setUp(self):
        triggerSomething(p4rev)

My_test.py

from BaseTest import BaseTest

rev = '12345'

class CheckError_Test(BaseTest):
    def __init__(self, rev):
        super(CheckError_Test, self).__init__(p4rev=rev)

    dosomething()

NOTE: If I don't have use super(BaseTest, self).__init__(methodName) I get an error: Attribute error: 'check_error_test' object has no attribute '_testMethodName'. Hence its inclusion

To Clarify: One comment suggests duplicate post, however linked post is about how to run tests in general, while this post asks how to access specific variables within a given test at runtime.

Answer 1

I would just use built in attributes plugin to pass the information down:

in my_test.py:

from base_test import BaseTest
from nose.plugins.attrib import attr

rev = '12345'

@attr(rev=rev)
class CheckError_Test(BaseTest):
    def test_me(self):
        assert self.rev == rev

in base_test.py:

import unittest

def triggerSomething(text):
    print "revision was set to",  text

class BaseTest(unittest.TestCase):
    def setUp(self):
        p4rev = getattr(self, 'rev')
        triggerSomething(p4rev)

shell output:

$ nosetests my_test.py --pdb -s

revision was set to 12345
.
----------------------------------------------------------------------
Ran 1 test in 0.002s

OK