linux-kernel - Re: [PATCH v3 0/1] lib: Convert UUID runtime test to KUnit

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Date:   Fri, 11 Jun 2021 07:48:26 -0300
From:   André Almeida <andrealmeid@...labora.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org,
        Brendan Higgins <brendanhiggins@...gle.com>,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
        Shuah Khan <shuah@...nel.org>, ~lkcamp/patches@...ts.sr.ht,
        nfraprado@...labora.com, leandro.ribeiro@...labora.com,
        Vitor Massaru Iha <vitor@...saru.org>, lucmaga@...il.com,
        David Gow <davidgow@...gle.com>,
        Daniel Latypov <dlatypov@...gle.com>, tales.aparecida@...il.com
Subject: Re: [PATCH v3 0/1] lib: Convert UUID runtime test to KUnit

Hi Andy,

Às 06:55 de 11/06/21, Andy Shevchenko escreveu:
> On Thu, Jun 10, 2021 at 01:39:58PM -0300, André Almeida wrote:
>> Hi,
>>
>> This patch converts existing UUID runtime test to use KUnit framework.
>>
>> Below, there's a comparison between the old output format and the new
>> one. Keep in mind that even if KUnit seems very verbose, this is the
>> corner case where _every_ test has failed.
> 
> Btw, do we have test coverage statistics?
> 
> I mean since we reduced 18 test cases to 12, do we still have the same / better
> test coverage?
> 
I don't think we have automated statistics, but I can assure you that
the coverage it's exactly the same. We are testing two correlated
functions with the same input, in a single test case, instead of having
a single case for each one, so that's why the number of cases is reduced.

For example, instead of:

	total_tests++;
	if (guid_parse(data->uuid, &le))


	total_tests++;
	if (!guid_equal(&data->le, &le))

We now have:

	KUNIT_ASSERT_EQ(guid_parse(data->guid, &le), 0)
	KUNIT_EXPECT_TRUE(guid_equal(&data->le, &le))

That will count as a single test.