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unittests: add fletcher* tests

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This commit is contained in:
Ludwig Knüpfer 2016-02-13 09:52:53 +01:00
parent 040ad55f62
commit 889adc18b8
4 changed files with 161 additions and 0 deletions
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71
tests/unittests/tests-checksum/tests-checksum-fletcher16.c Normal file
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@ -0,0 +1,71 @@
/*
* Copyright 2016 Ludwig Knüpfer <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"
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(void)
{
{
unsigned char buf[] = "";
uint16_t expect = 0xFFFF;
TEST_ASSERT(calc_and_compare_checksum(buf, sizeof(buf) - 1, expect));
}
{
/* 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));
}
{
/* 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));
}
}
Test *tests_checksum_fletcher16_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_checksum_fletcher16),
};
EMB_UNIT_TESTCALLER(checksum_fletcher16_tests, NULL, NULL, fixtures);
return (Test *)&checksum_fletcher16_tests;
}

74
tests/unittests/tests-checksum/tests-checksum-fletcher32.c Normal file
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@ -0,0 +1,74 @@
/*
* Copyright 2016 Ludwig Knüpfer <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"
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(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));
}
{
/* 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));
}
{
/* 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));
}
}
Test *tests_checksum_fletcher32_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_checksum_fletcher32),
};
EMB_UNIT_TESTCALLER(checksum_fletcher32_tests, NULL, NULL, fixtures);
return (Test *)&checksum_fletcher32_tests;
}

2
tests/unittests/tests-checksum/tests-checksum.c
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@ -11,4 +11,6 @@
void tests_checksum(void)
{
TESTS_RUN(tests_checksum_crc16_ccitt_tests());
TESTS_RUN(tests_checksum_fletcher16_tests());
TESTS_RUN(tests_checksum_fletcher32_tests());
}

14
tests/unittests/tests-checksum/tests-checksum.h
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@ -36,6 +36,20 @@ void tests_checksum(void);
*/
Test *tests_checksum_crc16_ccitt_tests(void);
/**
* @brief Generates tests for checksum/fletcher16.h
*
* @return embUnit tests if successful, NULL if not.
*/
Test *tests_checksum_fletcher16_tests(void);
/**
* @brief Generates tests for checksum/fletcher32.h
*
* @return embUnit tests if successful, NULL if not.
*/
Test *tests_checksum_fletcher32_tests(void);
#ifdef __cplusplus
}
#endif