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From: Shanthanu <shanthanu.s.rai9@gmail.com>
To: "Torsten Bögershausen" <tboegi@web.de>
Cc: git@vger.kernel.org
Subject: Re: [GSoC][PATCH 1/1] t9116: avoid using pipes
Date: Mon, 23 Mar 2020 12:34:16 +0530
Message-ID: <3f490717-fd3c-6c20-6a47-51b84b4c4860@gmail.com> (raw)
In-Reply-To: <20200322173616.wnz3umcxz25upv63@tb-raspi4>

Thanks for the review!

On 22/03/20 11:06 pm, Torsten Bögershausen wrote:
>> Commit de26f02db1 (t9001, t9116: avoid pipes, 2020-02-14) noticed that
>> when grepping through the output of a command, there is always a
>> chance that something could go wrong.
> That "something could go wrong" may deserve little bit more explanation
> in the commit message.
> One thing when using pipes is that we may loose return codes of programs
> being part of the pipe.
> The other thing is that it is hard to debug, if the test case fails.
> Having the "out" file left on disk allows manual inspection, and tracking
> down why it failed.

Yeah makes sense. I will update the commit message by adding the above
details.

> Having said this, we can make the test case even easier to debug, and consistant
> with other test cases, please see below.
>
>> So, redirect the output into a file and grep that file. Thus the log
>> can be inspected easily if the grep fails.
>>
>> Signed-off-by: Shanthanu <shanthanu.s.rai9@gmail.com>
>> ---
>>
>> In test 'test ascending revision range with --show-commit (sha1)',
>> 'out1' variable is used since 'out' variable was already in use.
>>
>>  t/t9116-git-svn-log.sh | 36 ++++++++++++++++++++++++------------
>>  1 file changed, 24 insertions(+), 12 deletions(-)
>>
>> diff --git a/t/t9116-git-svn-log.sh b/t/t9116-git-svn-log.sh
>> index 0a9f1ef366..d82aa0fab9 100755
>> --- a/t/t9116-git-svn-log.sh
>> +++ b/t/t9116-git-svn-log.sh
>> @@ -61,12 +61,14 @@ printf 'r1 \nr2 \nr4 \n' > expected-range-r1-r2-r4
>>
>>  test_expect_success 'test ascending revision range' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 1:4 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r1-r2-r4 -
>> +	git svn log -r 1:4 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r1-r2-r4 -
> That could be written as
> 	grep '^r[0-9]' out | cut -d'|' -f1 >actual &&
> 	test_cmp expected-range-r1-r2-r4 actual
>
> Or something in that style  (and similar below).
> What do you think ?
>
>>  	"
>>
>>  test_expect_success 'test ascending revision range with --show-commit' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log --show-commit -r 1:4 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r1-r2-r4 -
>> +	git svn log --show-commit -r 1:4 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r1-r2-r4 -
>>  	"
>>
>>  test_expect_success 'test ascending revision range with --show-commit (sha1)' "
>> @@ -74,7 +76,8 @@ test_expect_success 'test ascending revision range with --show-commit (sha1)' "
>>  	git svn find-rev r2 >>expected-range-r1-r2-r4-sha1 &&
>>  	git svn find-rev r4 >>expected-range-r1-r2-r4-sha1 &&
>>  	git reset --hard origin/trunk &&
>> -	git svn log --show-commit -r 1:4 | grep '^r[0-9]' | cut -d'|' -f2 >out &&
>> +	git svn log --show-commit -r 1:4 >out1 &&
>> +	grep '^r[0-9]' out1 | cut -d'|' -f2 >out &&
>>  	git rev-parse \$(cat out) >actual &&
>>  	test_cmp expected-range-r1-r2-r4-sha1 actual
>>  	"
>> @@ -83,45 +86,52 @@ printf 'r4 \nr2 \nr1 \n' > expected-range-r4-r2-r1
>>
>>  test_expect_success 'test descending revision range' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 4:1 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r4-r2-r1 -
>> +	git svn log -r 4:1 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r4-r2-r1 -
>>  	"
>>
>>  printf 'r1 \nr2 \n' > expected-range-r1-r2
>>
>>  test_expect_success 'test ascending revision range with unreachable revision' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 1:3 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r1-r2 -
>> +	git svn log -r 1:3 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r1-r2 -
>>  	"
>>
>>  printf 'r2 \nr1 \n' > expected-range-r2-r1
>>
>>  test_expect_success 'test descending revision range with unreachable revision' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 3:1 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r2-r1 -
>> +	git svn log -r 3:1 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r2-r1 -
>>  	"
>>
>>  printf 'r2 \n' > expected-range-r2
>>
>>  test_expect_success 'test ascending revision range with unreachable upper boundary revision and 1 commit' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 2:3 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r2 -
>> +	git svn log -r 2:3 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r2 -
>>  	"
>>
>>  test_expect_success 'test descending revision range with unreachable upper boundary revision and 1 commit' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 3:2 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r2 -
>> +	git svn log -r 3:2 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r2 -
>>  	"
>>
>>  printf 'r4 \n' > expected-range-r4
>>
>>  test_expect_success 'test ascending revision range with unreachable lower boundary revision and 1 commit' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 3:4 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r4 -
>> +	git svn log -r 3:4 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r4 -
>>  	"
>>
>>  test_expect_success 'test descending revision range with unreachable lower boundary revision and 1 commit' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 4:3 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r4 -
>> +	git svn log -r 4:3 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r4 -
>>  	"
>>
>>  printf -- '------------------------------------------------------------------------\n' > expected-separator
>> @@ -138,12 +148,14 @@ test_expect_success 'test descending revision range with unreachable boundary re
>>
>>  test_expect_success 'test ascending revision range with unreachable boundary revisions and 1 commit' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 3:5 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r4 -
>> +	git svn log -r 3:5 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r4 -
>>  	"
>>
>>  test_expect_success 'test descending revision range with unreachable boundary revisions and 1 commit' "
>>  	git reset --hard origin/trunk &&
>> -	git svn log -r 5:3 | grep '^r[0-9]' | cut -d'|' -f1 | test_cmp expected-range-r4 -
>> +	git svn log -r 5:3 >out &&
>> +	grep '^r[0-9]' out | cut -d'|' -f1 | test_cmp expected-range-r4 -
>>  	"
>>
>>  test_done
>> --
>> 2.26.0.rc2.28.g7fcb965970
>>
Yeah, this looks good! I will add these changes in the next patch version.

  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-22 12:46 [GSoC][PATCH 0/1] Microproject Submission Shanthanu
2020-03-22 12:46 ` [GSoC][PATCH 1/1] t9116: avoid using pipes Shanthanu
2020-03-22 17:36   ` Torsten Bögershausen
2020-03-23  7:04     ` Shanthanu [this message]
2020-03-24  9:35 ` [PATCH v2] " Shanthanu
2020-03-24 18:34   ` Christian Couder
2020-03-25 14:00     ` Shanthanu

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