linux-stable/lib/cmdline_kunit.c
Andy Shevchenko 7546861a8c lib/cmdline_kunit: add a new test suite for cmdline API
Test get_option() for a starter which is provided by cmdline.c.

[akpm@linux-foundation.org: fix warning by constifying cmdline_test_values]
[andriy.shevchenko@linux.intel.com: type of expected returned values should be int]
  Link: https://lkml.kernel.org/r/20201116104244.15472-1-andriy.shevchenko@linux.intel.com
[andriy.shevchenko@linux.intel.com: provide meaningful MODULE_LICENSE()]
  Link: https://lkml.kernel.org/r/20201116104257.15527-1-andriy.shevchenko@linux.intel.com

Link: https://lkml.kernel.org/r/20201112180732.75589-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Vitor Massaru Iha <vitor@massaru.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15 22:46:16 -08:00

100 lines
2.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Test cases for API provided by cmdline.c
*/
#include <kunit/test.h>
#include <linux/kernel.h>
#include <linux/random.h>
#include <linux/string.h>
static const char *cmdline_test_strings[] = {
"\"\"", "" , "=" , "\"-", "," , "-," , ",-" , "-" ,
"+," , "--", ",,", "''" , "\"\",", "\",\"", "-\"\"", "\"",
};
static const int cmdline_test_values[] = {
1, 1, 1, 1, 2, 3, 2, 3,
1, 3, 2, 1, 1, 1, 3, 1,
};
static void cmdline_do_one_test(struct kunit *test, const char *in, int rc, int offset)
{
const char *fmt = "Pattern: %s";
const char *out = in;
int dummy;
int ret;
ret = get_option((char **)&out, &dummy);
KUNIT_EXPECT_EQ_MSG(test, ret, rc, fmt, in);
KUNIT_EXPECT_PTR_EQ_MSG(test, out, in + offset, fmt, in);
}
static void cmdline_test_noint(struct kunit *test)
{
unsigned int i = 0;
do {
const char *str = cmdline_test_strings[i];
int rc = 0;
int offset;
/* Only first and leading '-' will advance the pointer */
offset = !!(*str == '-');
cmdline_do_one_test(test, str, rc, offset);
} while (++i < ARRAY_SIZE(cmdline_test_strings));
}
static void cmdline_test_lead_int(struct kunit *test)
{
unsigned int i = 0;
char in[32];
do {
const char *str = cmdline_test_strings[i];
int rc = cmdline_test_values[i];
int offset;
sprintf(in, "%u%s", get_random_int() % 256, str);
/* Only first '-' after the number will advance the pointer */
offset = strlen(in) - strlen(str) + !!(rc == 2);
cmdline_do_one_test(test, in, rc, offset);
} while (++i < ARRAY_SIZE(cmdline_test_strings));
}
static void cmdline_test_tail_int(struct kunit *test)
{
unsigned int i = 0;
char in[32];
do {
const char *str = cmdline_test_strings[i];
/* When "" or "-" the result will be valid integer */
int rc = strcmp(str, "") ? (strcmp(str, "-") ? 0 : 1) : 1;
int offset;
sprintf(in, "%s%u", str, get_random_int() % 256);
/*
* Only first and leading '-' not followed by integer
* will advance the pointer.
*/
offset = rc ? strlen(in) : !!(*str == '-');
cmdline_do_one_test(test, in, rc, offset);
} while (++i < ARRAY_SIZE(cmdline_test_strings));
}
static struct kunit_case cmdline_test_cases[] = {
KUNIT_CASE(cmdline_test_noint),
KUNIT_CASE(cmdline_test_lead_int),
KUNIT_CASE(cmdline_test_tail_int),
{}
};
static struct kunit_suite cmdline_test_suite = {
.name = "cmdline",
.test_cases = cmdline_test_cases,
};
kunit_test_suite(cmdline_test_suite);
MODULE_LICENSE("GPL");