Comments (4)
txels
commented on August 24, 2024
DDT creates four tests out of one, as you can see in output these are named:
test_larger_than_two_12
test_larger_than_two_23
test_larger_than_two_3
test_larger_than_two_4
So test_larger_than_two is no longer an individual test (that was kind of the whole point of ddt).
From what I've gathered, there is no way to issue a nosetests command-line that would run these four tests (e.g. by matching function name with a regex).
That said, you should be able to run them individually:
nosetests -vv test_foo.py:FooTestCase.test_larger_than_two_4
But nose still fails with:
$ nosetests -v test/test_example.py:FooTestCase.test_larger_than_two_4
Failure: ValueError (no such test method in <class 'test.test_example.FooTestCase'>: test_larger_than_two) ... ERROR
======================================================================
ERROR: Failure: ValueError (no such test method in <class 'test.test_example.FooTestCase'>: test_larger_than_two)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/carles/.virtualenvs/ddt/local/lib/python2.7/site-packages/nose/loader.py", line 518, in makeTest
return self._makeTest(obj, parent)
File "/home/carles/.virtualenvs/ddt/local/lib/python2.7/site-packages/nose/loader.py", line 572, in _makeTest
return parent(obj.__name__)
File "/usr/lib/python2.7/unittest/case.py", line 191, in __init__
(self.__class__, methodName))
ValueError: no such test method in <class 'test.test_example.FooTestCase'>: test_larger_than_two
----------------------------------------------------------------------
Ran 1 test in 0.000s
FAILED (errors=1)
So it may be something related with how nose loads/runs the tests when running an individual method. I'll try to debug and see if something can be done within ddt.
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omaciel
commented on August 24, 2024
Thank you @txels for the explanation (totally makes sense to me). Since I usually generate random data for my tests, it would be impossible to know ahead of time what the test name would be. I really appreciate anything you can do to help :)
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txels
commented on August 24, 2024
I've been able to fix this. Turns out there was a mismatch between the new function as attribute in the test class and the function name of said function. Released as 0.7.1
Now I can do:
$ nosetests -s -v test/test_example.py:FooTestCase.test_larger_than_two_3
test_larger_than_two_3 (test.test_example.FooTestCase) ... ok
----------------------------------------------------------------------
Ran 1 test in 0.000s
OK
Or even:
$ nosetests -s -v 'test/test_example.py:FooTestCase.test_tuples_extracted_into_arguments_(3, 2)'
test_tuples_extracted_into_arguments_(3, 2) (test.test_example.FooTestCase) ... ok
----------------------------------------------------------------------
Ran 1 test in 0.000s
But unfortunately nosetests doesn't allow me to select all functions matching a name... (something like FooTestCase.test_larger_than_two*). Will have to submit a patch to nose for that ;)
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omaciel
commented on August 24, 2024
Though this won't help me with my scenario (where @DaTa uses random values every time), I'm glad you fixed the other use case :) Cheers!
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