linux-kernel - Re: [RFC v2 01/14] kunit: test: add KUnit test runner core

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Date:   Fri, 2 Nov 2018 12:44:46 -0600
From:   Shuah Khan <shuah@...nel.org>
To:     Brendan Higgins <brendanhiggins@...gle.com>,
        gregkh@...uxfoundation.org, keescook@...gle.com, mcgrof@...nel.org
Cc:     joel@....id.au, mpe@...erman.id.au, joe@...ches.com, brakmo@...com,
        rostedt@...dmis.org, Tim.Bird@...y.com, khilman@...libre.com,
        julia.lawall@...6.fr, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        jdike@...toit.com, richard@....at, linux-um@...ts.infradead.org,
        daniel@...ll.ch, dri-devel@...ts.freedesktop.org, robh@...nel.org,
        dan.j.williams@...el.com, linux-nvdimm@...ts.01.org,
        kieran.bingham@...asonboard.com, Shuah Khan <shuah@...nel.org>
Subject: Re: [RFC v2 01/14] kunit: test: add KUnit test runner core

On 10/23/2018 05:57 PM, Brendan Higgins wrote:
> Add core facilities for defining unit tests; this provides a common way
> to define test cases, functions that execute code which is under test
> and determine whether the code under test behaves as expected; this also
> provides a way to group together related test cases in test suites (here
> we call them test_modules).
> 
> Just define test cases and how to execute them for now; setting
> expectations on code will be defined later.
> 
> Signed-off-by: Brendan Higgins <brendanhiggins@...gle.com>
> ---
>  include/kunit/test.h | 165 ++++++++++++++++++++++++++++++++++++++++++
>  kunit/Kconfig        |  17 +++++
>  kunit/Makefile       |   1 +
>  kunit/test.c         | 168 +++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 351 insertions(+)
>  create mode 100644 include/kunit/test.h
>  create mode 100644 kunit/Kconfig
>  create mode 100644 kunit/Makefile
>  create mode 100644 kunit/test.c
> 
> diff --git a/include/kunit/test.h b/include/kunit/test.h
> new file mode 100644
> index 0000000000000..e0b14b227ac44
> --- /dev/null
> +++ b/include/kunit/test.h
> @@ -0,0 +1,165 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Base unit test (KUnit) API.
> + *
> + * Copyright (C) 2018, Google LLC.
> + * Author: Brendan Higgins <brendanhiggins@...gle.com>
> + */
> +
> +#ifndef _KUNIT_TEST_H
> +#define _KUNIT_TEST_H
> +
> +#include <linux/types.h>
> +#include <linux/slab.h>
> +
> +struct test;
> +
> +/**
> + * struct test_case - represents an individual test case.
> + * @run_case: the function representing the actual test case.
> + * @name: the name of the test case.
> + *
> + * A test case is a function with the signature, ``void (*)(struct test *)``
> + * that makes expectations (see TEST_EXPECT_TRUE()) about code under test. Each
> + * test case is associated with a &struct test_module and will be run after the
> + * module's init function and followed by the module's exit function.
> + *
> + * A test case should be static and should only be created with the TEST_CASE()
> + * macro; additionally, every array of test cases should be terminated with an
> + * empty test case.
> + *
> + * Example:
> + *
> + * .. code-block:: c
> + *
> + *	void add_test_basic(struct test *test)
> + *	{
> + *		TEST_EXPECT_EQ(test, 1, add(1, 0));
> + *		TEST_EXPECT_EQ(test, 2, add(1, 1));
> + *		TEST_EXPECT_EQ(test, 0, add(-1, 1));
> + *		TEST_EXPECT_EQ(test, INT_MAX, add(0, INT_MAX));
> + *		TEST_EXPECT_EQ(test, -1, add(INT_MAX, INT_MIN));
> + *	}
> + *
> + *	static struct test_case example_test_cases[] = {
> + *		TEST_CASE(add_test_basic),
> + *		{},
> + *	};
> + *
> + */
> +struct test_case {
> +	void (*run_case)(struct test *test);
> +	const char name[256];
> +
> +	/* private: internal use only. */
> +	bool success;
> +};
> +

Introducing a prefix kunit_* might be a good idea for the API.
This comment applies to the rest of patches as well.

thanks,
-- Shuah