Unittest - How do I code lots of simple tests

[Anthony Briggs]

At 3:11 AM -0700 10/22/03, Paul Moore wrote:
>Peter Hansen <peter at engcorp.com> wrote in message 
>news:<3F95A5DC.51828269 at engcorp.com>...
>  > > No, you don't get the psychologically affirming "52 tests passed!"
>>  without changes to the TestRunner, but I assume the non-cosmetic part
>>  of this is more your concern right now...
>
>I don't see the remainder of the problem as "non-cosmetic". The error
>report I get (or rather the information it offers) is
>
>     1 test failed - pass count is 25 instead of 52.
>
>But that doesn't tell me *which* tests failed.

Are you running the tests verbosely? eg. with a -v argument under 
UNIX, or as specified in the docs 
<http://www.python.org/doc/current/lib/minimal-example.html>? I get 
the following output when using Miki's code (with a deliberate error 
thrown in, and the print statement commented out):

bash-2.05b$ ./test.py -v
test_1_I (__main__.KnownValues) ... ok
test_2_II (__main__.KnownValues) ... ok
test_3_II (__main__.KnownValues) ... FAIL
test_4_IV (__main__.KnownValues) ... ok
test_5_V (__main__.KnownValues) ... ok

======================================================================
FAIL: test_3_II (__main__.KnownValues)
----------------------------------------------------------------------
Traceback (most recent call last):
   File "./test.py", line 21, in test
     self.assertEqual(r, result)
   File "/usr/local/lib/python2.3/unittest.py", line 292, in failUnlessEqual
     raise self.failureException, \
AssertionError: 'II' != 'III'

----------------------------------------------------------------------
Ran 5 tests in 0.055s

FAILED (failures=1)
bash-2.05b$

>The key point here is that I'm NOT running one test - I really am
>running 52 distinct tests. OK, they are all very similar, differing
>only in the data - but for pity's sake, isn't that what an object
>oriented structure is supposed to make easy???

Well, you're testing one aspect of the code. It's really just a 
question of how you think about your tests.

Anthony
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