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reseau statique a...
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/*
* Copyright 2016 Ludwig KnΓΌpfer <ludwig.knuepfer@fu-berlin.de>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
#include <stdint.h>
#include "embUnit/embUnit.h"
#include "checksum/fletcher16.h"
#include "tests-checksum.h"
/* String is longer than 20 so it checks the wrap-around property of
* fletcher16 */
static const unsigned char wrap_around_data[] = "u9k89rm88z58f3hGxTfgG3BnyKnyRP";
static int calc_and_compare_checksum(const unsigned char *buf, size_t len,
uint16_t expected)
{
uint16_t result = fletcher16(buf, len);
return result == expected;
}
static void test_checksum_fletcher16_empty(void)
{
unsigned char buf[] = "";
uint16_t expect = 0xFFFF;
TEST_ASSERT(calc_and_compare_checksum(buf, sizeof(buf) - 1, expect));
}
static void test_checksum_fletcher16_0to1_undetected(void)
{
/* fletcher cannot distinguish between all 0 and all 1 segments */
unsigned char buf0[16] = {
0xA1, 0xA1, 0xA1, 0xA1,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x1A, 0x1A, 0x1A, 0x1A,
};
uint32_t expect = fletcher16(buf0, sizeof(buf0));
unsigned char buf1[16] = {
0xA1, 0xA1, 0xA1, 0xA1,
0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF,
0x1A, 0x1A, 0x1A, 0x1A,
};
TEST_ASSERT(calc_and_compare_checksum(buf1, sizeof(buf1), expect));
}
static void test_checksum_fletcher16_atoe(void)
{
/* verified with http://www.nitrxgen.net/hashgen/ */
unsigned char buf[] = "abcde";
uint16_t expect = 0xc8f0;
TEST_ASSERT(calc_and_compare_checksum(buf, sizeof(buf) - 1, expect));
}
static void test_checksum_fletcher16_wrap_around(void)
{
/* verified with http://www.nitrxgen.net/hashgen/ */
uint16_t expect = 0xf122;
TEST_ASSERT(calc_and_compare_checksum(wrap_around_data,
sizeof(wrap_around_data) - 1, expect));
}
Test *tests_checksum_fletcher16_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_checksum_fletcher16_empty),
new_TestFixture(test_checksum_fletcher16_0to1_undetected),
new_TestFixture(test_checksum_fletcher16_atoe),
new_TestFixture(test_checksum_fletcher16_wrap_around),
};
EMB_UNIT_TESTCALLER(checksum_fletcher16_tests, NULL, NULL, fixtures);
return (Test *)&checksum_fletcher16_tests;
}
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