From: Eric Sunshine <sunshine@sunshineco.com>
Date: Sat, 30 Nov 2019 11:31:04 GMT
Subject: Re: [PATCH v5 26/26] t7700: stop losing return codes of git commands
Message-ID: <CAPig+cQ38J_0wHLw0CuhSdWBBEP-RuAchgG014GPHiSp6QOpsQ@mail.gmail.com>
In-Reply-To: <20191130104812.GA18401@danh.dev>

On Sat, Nov 30, 2019 at 5:48 AM Danh Doan <congdanhqx@gmail.com> wrote:
> On 2019-11-27 11:54:04-0800, Denton Liu <liu.denton@gmail.com> wrote:
> > +   ! grep "^$coid " packlist &&
>
> I think we want to use test_must_fail instead of !

test_must_fail() is intended only for use with 'git' commands; "!"
should be used otherwise. Quoting from t/README:

    Don't use '! git cmd' when you want to make sure the git command
    exits with failure in a controlled way by calling "die()".  Instead,
    use 'test_must_fail git cmd'.  This will signal a failure if git
    dies in an unexpected way (e.g. segfault).

    On the other hand, don't use test_must_fail for running regular
    platform commands; just use '! cmd'.  We are not in the business
    of verifying that the world given to us sanely works.

So, Denton's use of "!" here is correct.