Re: [PATCH] merge-base: add tests for --is-ancestor

[Junio C Hamano <gitster@pobox.com>]

Phillip Wood <phillip.wood123@gmail.com> writes:

> Thanks for adding some tests for this option
>
>> diff --git a/t/t6010-merge-base.sh b/t/t6010-merge-base.sh
>> index 44c726ea39..d28d9dab2c 100755
>> --- a/t/t6010-merge-base.sh
>> +++ b/t/t6010-merge-base.sh
>> @@ -305,4 +305,38 @@ test_expect_success 'merge-base --octopus --all for complex tree' '
>>   	test_cmp expected actual
>>   '
>>   
>> +test_expect_success 'setup --is-ancestor' '
>> +	git init is-ancestor &&
>> +	(
>> +		cd is-ancestor &&
>> +		test_commit one &&
>> +		test_commit two &&
>> +		git checkout -b side one &&
>> +		test_commit three
>> +	)
>> +'
>
> Do we really need to create a new repository? None of the existing tests 
> do that - can't we just use the commits created by the first test? 

Good point.  It is often a lot more work to do so when writing these
new tests, and I suspect that is the reason why this new repository
was created, but I do not know whether, in the long run, it is
cheaper and more maintainable to reuse the test history that has been
used by all existing tests above.  The next developer who needs to
tweak the first test has 5 (the number of tests below) extra
constraints if we go that route, but a separate setup means the two
sets of tests are more isolated.

> Having said that, the tests below look good. We could perhaps have a 
> test to check that it fails with one commit or three commits but what 
> you have here is clearly a very useful improvement in our test coverage.

Thanks.