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/* SPDX-License-Identifier: GPL-2.0-only */
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <tests/test.h>
/*
* Important note: In every particular test, don't use any string-related
* functions other than function under test. We are linking against
* src/lib/string.c not the standard library. This is important for proper test
* isolation.
*/
struct string_pairs_t {
char *dst;
char *src;
} string_pairs[] = {
{"Hello ", "world!"},
{"He\0llo ", "world"},
{"", "world!"},
{"", ""},
};
/* Used to test atol */
struct str_with_l_val_t {
char *str;
long value;
} str_with_l_val[] = {
{"42", 42},
{"four42", 0},
{"42five5", 42},
{"4\02", 4},
{"+42", 42},
{"-42", -42},
{"\t\n\r\f\v-42", -42},
};
static void test_strdup(void **state)
{
char str[] = "Hello coreboot\n";
char *duplicate = strdup(str);
/* There is a more suitable Cmocka's function 'assert_string_equal()', but it
is using strcmp() internally. */
assert_int_equal(0, memcmp(str, duplicate, __builtin_strlen(str)));
free(duplicate);
}
static void test_strconcat(void **state)
{
int i;
size_t str_len, str2_len, res_len;
char *result;
for (i = 0; i < ARRAY_SIZE(string_pairs); i++) {
str_len = __builtin_strlen(string_pairs[i].dst);
str2_len = __builtin_strlen(string_pairs[i].src);
result = strconcat(string_pairs[i].dst, string_pairs[i].src);
res_len = __builtin_strlen(result);
assert_int_equal(res_len, str_len + str2_len);
assert_int_equal(0, memcmp(string_pairs[i].dst, result, str_len));
assert_int_equal(0, memcmp(string_pairs[i].src, result + str_len, str2_len));
free(result);
}
}
static void test_strchr(void **state)
{
char str[] = "Abracadabra!\n";
assert_ptr_equal(str, strchr(str, 'A'));
assert_ptr_equal(str + 3, strchr(str, 'a'));
assert_ptr_equal(str + 12, strchr(str, '\n'));
assert_null(strchr(str, 'z'));
}
static void test_strrchr(void **state)
{
char str[] = "Abracadabra!\n";
assert_ptr_equal(str, strrchr(str, 'A'));
assert_ptr_equal(str + 9, strrchr(str, 'r'));
assert_ptr_equal(str + 12, strrchr(str, '\n'));
assert_null(strrchr(str, 'z'));
}
static void test_strncpy(void **state)
{
int i;
int n1 = 2, n2 = 8;
char src[] = "Hello";
char dst[sizeof(src) + 5];
size_t src_len = __builtin_strlen(src);
size_t dst_len = sizeof(dst);
/* n1 case */
/* Needed for ensuring that characters behind the limit
are not overwritten */
memset(dst, 'x', dst_len);
strncpy(dst, src, n1);
assert_int_equal(0, memcmp(dst, src, n1));
for (i = n1; i < dst_len; i++)
assert_true(dst[i] == 'x');
/* n2 case: */
memset(dst, 'x', dst_len);
strncpy(dst, src, n2);
assert_int_equal(0, memcmp(dst, src, src_len));
for (i = src_len; i < n2; i++)
assert_true(dst[i] == '\0');
for (i = n2; i < dst_len; i++)
assert_true(dst[i] == 'x');
}
static void test_strcpy(void **state)
{
char src[] = "Hello coreboot\n";
char dst[sizeof(src)];
/* Make sure that strcpy() sets '\0' by initializing a whole
dst array to fixed, non-'\0' value */
memset(dst, 'x', sizeof(dst));
strcpy(dst, src);
assert_int_equal(0, memcmp(dst, src, __builtin_strlen(src) + 1));
}
static void test_strcmp(void **state)
{
char str[] = "Banana";
char str2[] = "Banana";
char str3[] = "Bananas";
assert_true(strcmp(str, str3) < 0);
assert_int_equal(0, strcmp(str, str2));
assert_true(strcmp(str3, str2) > 0);
}
static void test_strncmp(void **state)
{
char str[] = "Banana";
char str2[] = "Bananas";
size_t str2_len = __builtin_strlen(str2);
assert_true(strncmp(str, str2, str2_len) < 0);
assert_int_equal(0, strncmp(str, str2, str2_len - 1));
}
static void test_strspn(void **state)
{
char str[] = "4213401234";
char str2[] = "01234";
char str3[] = "1234";
assert_int_equal(5, strspn(str, str3));
assert_int_equal(0, strspn(str2, str3));
}
static void test_strcspn(void **state)
{
char str[] = "12340000";
char str2[] = "00001234";
char str3[] = "1234";
assert_int_equal(0, strcspn(str, str3));
assert_int_equal(4, strcspn(str2, str3));
}
/* Please bear in mind that `atol()` uses `strspn()` internally, so the result
of `test_atol` is dependent on the result of `test_strspn`. */
static void test_atol(void **state)
{
int i;
for (i = 0; i < ARRAY_SIZE(str_with_l_val); i++)
assert_int_equal(str_with_l_val[i].value, atol(str_with_l_val[i].str));
}
int main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test(test_strdup),
cmocka_unit_test(test_strconcat),
cmocka_unit_test(test_strchr),
cmocka_unit_test(test_strrchr),
cmocka_unit_test(test_strncpy),
cmocka_unit_test(test_strcpy),
cmocka_unit_test(test_strcmp),
cmocka_unit_test(test_strncmp),
cmocka_unit_test(test_strspn),
cmocka_unit_test(test_strcspn),
cmocka_unit_test(test_atol),
};
return cb_run_group_tests(tests, NULL, NULL);
}
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