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Re: unit testing class hierarchies

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Ulrich Eckhardt wrote:

> Am 02.10.2012 16:06, schrieb Thomas Bach:
>> On Tue, Oct 02, 2012 at 02:27:11PM +0200, Ulrich Eckhardt wrote:
>>> As you see, the code for test_base() is redundant, so the idea is to
>>> move it to a baseclass:
>>>
>>> class TestBase(unittest.TestCase):
>>>      def test_base(self):
>>>          ...
>>>
>>> class TestD1(TestBase):
>>>      def test_r(self):
>>>          ...
>>>      def test_s(self):
>>>          ...
>>>
>>> class TestD2(TestBase):
>>>      def test_x(self):
>>>          ...
>>>      def test_y(self):
>>>          ...
>>
>> Could you provide more background? How do you avoid that test_base()
>> runs in TestD1 or TestD2?
> 
> Sorry, there's a misunderstanding: I want test_base() to be run as part
> of both TestD1 and TestD2, because it tests basic functions provided by
> both classes D1 and D2. The instances of D1 and D2 are created in
> TestD1.setUp and TestD2.setUp and then used by all tests. There is no
> possible implementation creating such an instance for TestBase, since
> the baseclass is abstract.
> 
> Last edit for today, I hope that makes my intentions clear...
> 
> ;)

Ceterum censeo baseclassinem esse delendam ;)

$ cat test_shared.py
import unittest

class Shared(unittest.TestCase):
    def test_shared(self):
        pass

class D1(Shared):
    def test_d1_only(self):
        pass

class D2(Shared):
    def test_d2_only(self):
        pass

del Shared

unittest.main()

$ python test_shared.py -v
test_d1_only (__main__.D1) ... ok
test_shared (__main__.D1) ... ok
test_d2_only (__main__.D2) ... ok
test_shared (__main__.D2) ... ok

----------------------------------------------------------------------
Ran 4 tests in 0.000s

OK
$ 

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unit testing class hierarchies Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-10-02 14:27 +0200
  Re: unit testing class hierarchies Demian Brecht <demianbrecht@gmail.com> - 2012-10-02 07:05 -0700
  Re: unit testing class hierarchies Thomas Bach <thbach@students.uni-mainz.de> - 2012-10-02 16:06 +0200
    Re: unit testing class hierarchies Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-10-02 17:24 +0200
    Re: unit testing class hierarchies Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-10-02 18:54 +0200
      Re: unit testing class hierarchies Peter Otten <__peter__@web.de> - 2012-10-02 19:38 +0200
      Re: unit testing class hierarchies Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-10-02 19:41 +0100
      Re: unit testing class hierarchies Ben Finney <ben+python@benfinney.id.au> - 2012-10-03 08:30 +1000
        Re: unit testing class hierarchies Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-03 01:20 +0000
          Re: unit testing class hierarchies Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2012-10-03 10:33 +0100
          Re: unit testing class hierarchies Terry Reedy <tjreedy@udel.edu> - 2012-10-03 16:14 -0400
  Re: unit testing class hierarchies Peter Otten <__peter__@web.de> - 2012-10-02 16:32 +0200
  Re: unit testing class hierarchies Fayaz Yusuf Khan <fayaz@dexetra.com> - 2012-10-02 20:35 +0530
  Re: unit testing class hierarchies Peter Otten <__peter__@web.de> - 2012-10-02 19:40 +0200
    Re: unit testing class hierarchies Roy Smith <roy@panix.com> - 2012-10-02 19:46 -0400

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