a752c7ab
 elopes
add first test an...
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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/fletcher32.h"
#include "tests-checksum.h"
/* String is longer than 359 so it checks the wrap-around property of
* fletcher32 */
static const unsigned char wrap_around_data[] =
"AD3Awn4kb6FtcsyE0RU25U7f55Yncn3LP3oEx9Gl4qr7iDW7I8L6Pbw9jNnh0sE4DmCKuc"
"d1J8I34vn31W924y5GMS74vUrZQc08805aj4Tf66HgL1cO94os10V2s2GDQ825yNh9Yuq3"
"QHcA60xl31rdA7WskVtCXI7ruH1A4qaR6Uk454hm401lLmv2cGWt5KTJmr93d3JsGaRRPs"
"4HqYi4mFGowo8fWv48IcA3N89Z99nf0A0H2R6P0uI4Tir682Of3Rk78DUB2dIGQRRpdqVT"
"tLhgfET2gUGU65V3edSwADMqRttI9JPVz8JS37g5QZj4Ax56rU1u0m0K8YUs57UYG5645n"
"byNy4yqxu7";
static int calc_and_compare_checksum(const unsigned char *buf, size_t len,
uint32_t expected)
{
const uint16_t *buf16 = (const uint16_t *) buf;
size_t len16 = len/2;
uint32_t result = fletcher32(buf16, len16);
return result == expected;
}
static void test_checksum_fletcher32_empty(void)
{
/* the initial checksum value is 0xFFFFFFFF */
unsigned char buf[] = "";
uint32_t expect = 0xFFFFFFFF;
TEST_ASSERT(calc_and_compare_checksum(buf, sizeof(buf) - 1, expect));
}
static void test_checksum_fletcher32_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 = fletcher32((const uint16_t *) buf0, sizeof(buf0)/2);
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_fletcher32_atof(void)
{
/* XXX: not verified with external implementation yet */
unsigned char buf[] = "abcdef";
uint32_t expect = 0x56502d2a;
TEST_ASSERT(calc_and_compare_checksum(buf, sizeof(buf) - 1, expect));
}
static void test_checksum_fletcher32_wrap_around(void)
{
/* XXX: not verified with external implementation yet */
uint32_t expect = 0x5bac8c3d;
TEST_ASSERT(calc_and_compare_checksum(wrap_around_data,
sizeof(wrap_around_data) - 1, expect));
}
Test *tests_checksum_fletcher32_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_checksum_fletcher32_empty),
new_TestFixture(test_checksum_fletcher32_0to1_undetected),
new_TestFixture(test_checksum_fletcher32_atof),
new_TestFixture(test_checksum_fletcher32_wrap_around),
};
EMB_UNIT_TESTCALLER(checksum_fletcher32_tests, NULL, NULL, fixtures);
return (Test *)&checksum_fletcher32_tests;
}
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