Subject: Re: [PATCH 6/9] t4013: add tests for log.diffMerges config

From: Junio C Hamano <[email-masked]>
Date: Wed, 07 Apr 2021 16:35:06 -0700

Ævar Arnfjörð Bjarmason <[email-masked]> writes:

>> +test_expect_success 'deny wrong log.diffMerges config' '
>> +	git config log.diffMerges wrong-value &&
>> +	test_expect_code 128 git log &&
>> +	git config --unset log.diffMerges
>
> Don't use "git config", but "test_config" at the start, then you don't
> need the --unset at the end, it'll happen automatically. Ditto for the
> following tests.

More importantly, test_config arranges the unset to happen even if
a step in the middle (e.g. test_expect_code in the above example)
fails.  In the posted version, the control would not reach the
"git config --unset" and leaves the configuration behind.

And that is the biggest reason why the above should use test_config.

Thanks for a good suggestion.