[Python-Dev] unittest.main() --catch parameter

[anatoly techtonik]

On Thu, Mar 3, 2011 at 10:44 PM, Michael Foord
<fuzzyman at voidspace.org.uk> wrote:
> On 03/03/2011 20:31, anatoly techtonik wrote:
>>
>> I am looking at --help of test runner and asking the question: what is
>> the use case for -c, --catch option?
>
> It catches keyboard interrupt and instead of just bombing out of the test
> run it reports all the results collected so far.
>
> Without this option interrupting a test run with a ctrl-c kills the run and
> reports nothing. Seeing an unexpected failure or error during a long test
> run and having to wait to the end of the test run to see the traceback can
> be annoying, this feature solves that problem.

Why not just leave this behavior by default and just return -1 if the
Ctrl-C was pressed?

>> It doesn't look like it should be
>> present in generic runner. I also can't find reasons to waste short
>> option for it.
>
> Nose, django and other test runners provide this option, so it is
> functionality that people seem to value.
>
>> There will be big problems with people complaining
>> about BC break even if this option is not used by anyone.
>>
>
> I don't understand this sentence, sorry.

If the option is useless, people won't allow to remove it, because it
will break "backward compatibility" (BC), even if they don't use this
option themselves.

> All the best,
>
> Michael Foord
>>
>> Usage: tests.py [options] [test] [...]
>>
>> Options:
>>   -h, --help       Show this message
>>   -v, --verbose    Verbose output
>>   -q, --quiet      Minimal output
>>   -f, --failfast   Stop on first failure
>>   -c, --catch      Catch control-C and display results
>>   -b, --buffer     Buffer stdout and stderr during test runs
>>
>>
>> --
>> anatoly t.
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>
>
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> http://www.voidspace.org.uk/
>
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>