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From: Junio C Hamano <gitster@pobox.com>
To: Stefan Beller <sbeller@google.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH 2/2] tests: fix diff order arguments in test_cmp
Date: Sat, 07 Oct 2017 11:29:19 +0900	[thread overview]
Message-ID: <xmqqwp47u1vk.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <20171006190006.19623-2-sbeller@google.com> (Stefan Beller's message of "Fri, 6 Oct 2017 12:00:06 -0700")

Stefan Beller <sbeller@google.com> writes:

> diff --git a/t/t4205-log-pretty-formats.sh b/t/t4205-log-pretty-formats.sh
> index ec5f530102..42f584f8b3 100755
> --- a/t/t4205-log-pretty-formats.sh
> +++ b/t/t4205-log-pretty-formats.sh
> @@ -590,7 +590,7 @@ test_expect_success '%(trailers:unfold) unfolds trailers' '
>  test_expect_success ':only and :unfold work together' '
>  	git log --no-walk --pretty="%(trailers:only:unfold)" >actual &&
>  	git log --no-walk --pretty="%(trailers:unfold:only)" >reverse &&
> -	test_cmp actual reverse &&
> +	test_cmp reverse actual &&
>  	{
>  		grep -v patch.description <trailers | unfold &&
>  		echo

This test is trying to see that giving the two modifers in any order
produces identical results, so the result of swaping is no more or
no less correct than the original, because what this test calls
"actual" is no less authoritative result than what is in "reverse"
at this point, which is the reason why we prefer "expect actual" in
the typical use of test_cmp.

Renaming <actual, reverse> to (rather meaningless) <one, two> or
<only-unfold, unfold-only> might make the intention a bit clearer.

THanks.

  parent reply	other threads:[~2017-10-07  2:29 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-06 19:00 [PATCH 1/2] tests: use shell negation instead of test_must_fail for test_cmp Stefan Beller
2017-10-06 19:00 ` [PATCH 2/2] tests: fix diff order arguments in test_cmp Stefan Beller
2017-10-06 22:01   ` Jonathan Nieder
2017-10-06 22:10     ` Stefan Beller
2017-10-07  1:18       ` Junio C Hamano
2017-10-07  2:29   ` Junio C Hamano [this message]
2017-10-06 19:22 ` [PATCH 1/2] tests: use shell negation instead of test_must_fail for test_cmp Jeff King
2017-10-06 19:41   ` Stefan Beller
2017-10-06 21:59   ` Jonathan Nieder
2017-10-07  2:12   ` Junio C Hamano
2017-10-06 20:21 ` Jonathan Nieder

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