From: "Michał Kępień" <michal@isc.org>
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Cc: git@vger.kernel.org
Subject: Re: [PATCH v2 3/3] t: add -I<regex> tests
Date: Tue, 13 Oct 2020 08:38:46 +0200 [thread overview]
Message-ID: <20201013063846.GF3278@larwa.hq.kempniu.pl> (raw)
In-Reply-To: <nycvar.QRO.7.76.6.2010121320190.50@tvgsbejvaqbjf.bet>
Hi Johannes,
> > Exercise the new -I<regex> diff option in various scenarios to ensure it
> > behaves as expected.
>
> Excellent. I was actually looking for a test in patch 2/3 and almost
> commented about that.
Right, I expressed my doubts in this area at the end of the cover letter
for v1:
>> - Should tests be added in a separate commit? This is what I did as I
>> thought it would help with readability, but...
I will be glad to follow any guidance provided, I just picked one of the
two possible routes for v1.
> Hmm. I wonder whether we could do with a much more concise test script.
> The test suite already takes a quite long time to run, which is not a
> laughing matter: we had issues in the past where contributors would skip
> running it because it took too long, and this test is sure to exacerbate
> that problem.
First, let me say that the goal of minimizing the run time of a test
suite is close to my heart (it is an issue at my day job). Yet, I
assumed that this new test would not be detrimental to test suite run
times as it takes about half a second to run t4069-diff-ignore-regex.sh
on my machine - and (I hope) its contents are in line with the "tests
are the best documentation" proverb. That being said, I realize that
the hosts used in various test environments may have different
processing capabilities. I tried preparing something exhaustive and
well-commented, so that it is clear what to expect from the new feature.
Yet, if you would rather have me cut some things out, I am certainly not
particularly attached to the tests from patch 3 and I will be glad to
rip them out if that is the recommendation :-)
> I could imagine, for example, that it would be plenty enough to do
> something like this instead:
>
> -- snip --
> diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
> index 5c7b0122b4f..bf158be137f 100755
> --- a/t/t4013-diff-various.sh
> +++ b/t/t4013-diff-various.sh
> @@ -6,6 +6,7 @@
> test_description='Various diff formatting options'
>
> . ./test-lib.sh
> +. "$TEST_DIRECTORY"/diff-lib.sh
>
> test_expect_success setup '
>
> @@ -473,4 +474,24 @@ test_expect_success 'diff-tree --stdin with log formatting' '
> test_cmp expect actual
> '
>
> +test_expect_success '-I<regex>' '
> + seq 50 >I.txt &&
> + sed -e "s/13/ten and three/" -e "/7\$/d" <I.txt >J.txt &&
> + test_must_fail git diff --no-index -I"ten.*e" -I"^[124-9]" I.txt J.txt >actual &&
> + cat >expect <<-\EOF &&
> + diff --git a/I.txt b/J.txt
> + --- a/I.txt
> + +++ b/J.txt
> + @@ -34,7 +31,6 @@
> + 34
> + 35
> + 36
> + -37
> + 38
> + 39
> + 40
> + EOF
> + compare_diff_patch expect actual
> +'
> +
> test_done
> -- snap --
>
> Note how it tests various things in one go?
Right, neat, though this does not (yet) test:
- the interaction between -I and --ignore-blank-lines (this is visible
in code coverage),
- whether the list of hunks emitted varies for different -U<n> values,
- diffstat with -I<regex>,
- invalid regular expressions.
Would you like me to add these tests to your proposal or to skip them,
given that -I uses the same field for marking changes as ignored as
--ignore-blank-lines does?
> P.S.: My main interest in the `-I` option is its use case for `git
> range-diff` in Git's own context: if you want to compare your patches to
> what entered the `seen` branch, there will _always_ be a difference
> because Junio adds their DCO. Something like this can help that:
>
> git range-diff \
> -I'^ Signed-off-by: Junio C Hamano <gitster@pobox.com>$' \
> <my-patch-range> <the-equivalent-in-seen>
Right, makes sense, I have not thought of that use case.
--
Best regards,
Michał Kępień
next prev parent reply other threads:[~2020-10-13 6:38 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-01 12:06 [PATCH 0/2] diff: add -I<regex> that ignores matching changes Michał Kępień
2020-10-01 12:06 ` [PATCH 1/2] " Michał Kępień
2020-10-01 18:21 ` Junio C Hamano
2020-10-07 19:48 ` Michał Kępień
2020-10-07 20:08 ` Junio C Hamano
2020-10-01 12:06 ` [PATCH 2/2] t: add -I<regex> tests Michał Kępień
2020-10-01 17:02 ` [PATCH 0/2] diff: add -I<regex> that ignores matching changes Junio C Hamano
2020-10-12 9:17 ` [PATCH v2 0/3] " Michał Kępień
2020-10-12 9:17 ` [PATCH v2 1/3] merge-base, xdiff: zero out xpparam_t structures Michał Kępień
2020-10-12 11:14 ` Johannes Schindelin
2020-10-12 17:09 ` Junio C Hamano
2020-10-12 19:52 ` Junio C Hamano
2020-10-13 6:35 ` Michał Kępień
2020-10-12 9:17 ` [PATCH v2 2/3] diff: add -I<regex> that ignores matching changes Michał Kępień
2020-10-12 11:20 ` Johannes Schindelin
2020-10-12 20:00 ` Junio C Hamano
2020-10-12 20:39 ` Johannes Schindelin
2020-10-12 21:43 ` Junio C Hamano
2020-10-13 6:37 ` Michał Kępień
2020-10-13 15:49 ` Junio C Hamano
2020-10-13 6:36 ` Michał Kępień
2020-10-13 12:02 ` Johannes Schindelin
2020-10-13 15:53 ` Junio C Hamano
2020-10-13 18:45 ` Michał Kępień
2020-10-12 18:01 ` Junio C Hamano
2020-10-13 6:38 ` Michał Kępień
2020-10-12 20:04 ` Junio C Hamano
2020-10-13 6:38 ` Michał Kępień
2020-10-12 9:17 ` [PATCH v2 3/3] t: add -I<regex> tests Michał Kępień
2020-10-12 11:49 ` Johannes Schindelin
2020-10-13 6:38 ` Michał Kępień [this message]
2020-10-13 12:00 ` Johannes Schindelin
2020-10-13 16:00 ` Junio C Hamano
2020-10-13 19:01 ` Michał Kępień
2020-10-15 11:45 ` Johannes Schindelin
2020-10-15 7:24 ` [PATCH v3 0/2] diff: add -I<regex> that ignores matching changes Michał Kępień
2020-10-15 7:24 ` [PATCH v3 1/2] merge-base, xdiff: zero out xpparam_t structures Michał Kępień
2020-10-15 7:24 ` [PATCH v3 2/2] diff: add -I<regex> that ignores matching changes Michał Kępień
2020-10-16 15:32 ` Phillip Wood
2020-10-16 18:04 ` Junio C Hamano
2020-10-19 9:48 ` Michał Kępień
2020-10-16 18:16 ` Junio C Hamano
2020-10-19 9:55 ` Michał Kępień
2020-10-19 17:29 ` Junio C Hamano
2020-10-16 10:00 ` [PATCH v3 0/2] " Johannes Schindelin
2020-10-20 6:48 ` [PATCH v4 " Michał Kępień
2020-10-20 6:48 ` [PATCH v4 1/2] merge-base, xdiff: zero out xpparam_t structures Michał Kępień
2020-10-20 6:48 ` [PATCH v4 2/2] diff: add -I<regex> that ignores matching changes Michał Kępień
2021-02-05 14:13 ` [PATCH 1/2] diff: add an API for deferred freeing Ævar Arnfjörð Bjarmason
2021-02-10 16:00 ` Johannes Schindelin
2021-02-11 3:00 ` Ævar Arnfjörð Bjarmason
2021-02-11 9:40 ` Johannes Schindelin
2021-02-11 10:21 ` Jeff King
2021-02-11 10:45 ` [PATCH v2 0/2] " Ævar Arnfjörð Bjarmason
2021-02-11 10:45 ` [PATCH v2 1/2] " Ævar Arnfjörð Bjarmason
2021-02-11 10:45 ` [PATCH v2 2/2] diff: plug memory leak from regcomp() on {log,diff} -I Ævar Arnfjörð Bjarmason
2021-02-05 14:13 ` [PATCH " Ævar Arnfjörð Bjarmason
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