From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: "René Scharfe" <l.s.r@web.de>, "Git List" <git@vger.kernel.org>
Subject: Re: [PATCH 3/9] test-mergesort: add test subcommand
Date: Sat, 02 Oct 2021 10:35:40 +0200 [thread overview]
Message-ID: <87o887q0s9.fsf@evledraar.gmail.com> (raw)
In-Reply-To: <xmqq7dew7aqd.fsf@gitster.g>
On Fri, Oct 01 2021, Junio C Hamano wrote:
> René Scharfe <l.s.r@web.de> writes:
>
>> +static void dist_rand(int *arr, int n, int m)
>> +{
>> + int i;
>> + for (i = 0; i < n; i++)
>> + arr[i] = rand() % m;
>> +}
>> ...
>> +static void dist_shuffle(int *arr, int n, int m)
>> +{
>> + int i, j, k;
>> + for (i = j = 0, k = 1; i < n; i++)
>> + arr[i] = (rand() % m) ? (j += 2) : (k += 2);
>> +}
>
> I briefly wondered if we want to seed the rand() in some way to make
> the tests reproducible, but we'd need to ship our own rand() if we
> wanted to go that route, which would probably be too much.
Wouldn't calling srand() with some constant value suffice on most
platforms? I'm aware of it being a NOOP and rand() always being randomly
seeded on (IIRC) OpenBSD, but that should work on e.g. glibc.
>> int cmd__mergesort(int argc, const char **argv)
>> {
>> if (argc == 2 && !strcmp(argv[1], "sort"))
>> return sort_stdin();
>> - usage("test-tool mergesort sort");
>> + if (argc > 1 && !strcmp(argv[1], "test"))
>> + return run_tests(argc - 2, argv + 2);
>> + fprintf(stderr, "usage: test-tool mergesort sort\n");
>> + fprintf(stderr, " or: test-tool mergesort test [<n>...]\n");
>> + return 129;
>
> If you can live with OPT_CMDMODE to implement sort/test subcommands,
> you'd get to have parse_options() to do the usage for you, I think.
> I am not sure if it is worth it, as t/helper/ is not end-user
> facing.
Yeah I think the one thing that could improve here is this custom
getopts handling, in particular the manual formatting of "usage" and
"or" is a bit ugly, considering that you'll get it for free with the
parse_options() "usage" array.
next prev parent reply other threads:[~2021-10-02 8:38 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-01 9:07 [PATCH 0/9] mergesort: improve tests and performance René Scharfe
2021-10-01 9:10 ` [PATCH 1/9] test-mergesort: use strbuf_getline() René Scharfe
2021-10-02 9:08 ` Ævar Arnfjörð Bjarmason
2021-10-02 16:56 ` René Scharfe
2021-10-01 9:11 ` [PATCH 2/9] test-mergesort: add sort subcommand René Scharfe
2021-10-01 20:26 ` Junio C Hamano
2021-10-01 9:12 ` [PATCH 3/9] test-mergesort: add test subcommand René Scharfe
2021-10-01 20:26 ` Junio C Hamano
2021-10-02 8:35 ` Ævar Arnfjörð Bjarmason [this message]
2021-10-03 10:15 ` René Scharfe
2021-10-03 17:33 ` Junio C Hamano
2021-10-07 20:00 ` René Scharfe
2021-10-08 4:04 ` [PATCH 10/9 v2] test-mergesort: use repeatable random numbers René Scharfe
2021-10-08 4:17 ` Jeff King
2021-10-08 7:23 ` Ævar Arnfjörð Bjarmason
2021-10-08 17:30 ` René Scharfe
2021-10-08 19:00 ` Ævar Arnfjörð Bjarmason
2021-10-03 10:15 ` [PATCH 3/9] test-mergesort: add test subcommand René Scharfe
2021-10-01 9:14 ` [PATCH 4/9] test-mergesort: add generate subcommand René Scharfe
2021-10-01 9:16 ` [PATCH 5/9] test-mergesort: add unriffle mode René Scharfe
2021-10-01 9:17 ` [PATCH 6/9] test-mergesort: add unriffle_skewed mode René Scharfe
2021-10-01 9:19 ` [PATCH 7/9] p0071: measure sorting of already sorted and reversed files René Scharfe
2021-10-01 9:19 ` [PATCH 8/9] p0071: test performance of llist_mergesort() René Scharfe
2021-10-01 9:22 ` [PATCH 9/9] mergesort: use ranks stack René Scharfe
2022-01-17 17:43 ` Ævar Arnfjörð Bjarmason
2022-01-17 18:22 ` René Scharfe
2022-01-18 5:07 ` René Scharfe
2022-01-18 10:40 ` Ævar Arnfjörð Bjarmason
2022-01-18 12:27 ` René Scharfe
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