basetester.py

import os

import tempdir

class BaseTester(object):
    def setUp(self):
        ''' Auto enter temporary directory '''
        self.tdir = tempdir.TempDir()
        os.chdir(self.tdir.name)

    def tearDown(self):
        ''' Clean up the tempdir after test '''
        self.tdir.dissolve()

    def _C( self, *args, **kwargs):        
        '''
        Set modulepath as instance variable to be the name of the module
        Set functionname as instance variable to automagically run that function
        with self._C
        '''
        m = __import__( self.modulepath, fromlist=[self.functionname] )
        return getattr(m,self.functionname)( *args, **kwargs )

example.py

def example1(self):
    return True

def example2(self):
    return False
  

test_example.py

from basetester import BaseTester

class Base(BaseTester):
    modulepath = 'example'

class TestExample1(BaseTester):
    functionname = 'example1'

    def test_is_true(self):
        eq_( self._C(), True )

class TestExample2(BaseTester):
    functionname = 'example2'

    def test_is_false(self):
       eq_( self._C(), False )