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Add tests for csp_crc32_verify #1

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Mar 26, 2024
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1 change: 1 addition & 0 deletions CMakeLists.txt
Original file line number Diff line number Diff line change
Expand Up @@ -8,4 +8,5 @@ project(speq)
target_sources(app PRIVATE
src/main.c
src/buffer.c
src/crc32.c
)
95 changes: 95 additions & 0 deletions src/crc32.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,95 @@
/*
* Copyright (c) 2024 Space Cubics, LLC.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/ztest.h>
#include <csp/csp.h>
#include <csp/csp_crc32.h>
#include <csp/csp_id.h>
#include <endian.h>

struct crc_fixture {
csp_packet_t *buf;
};

static struct crc_fixture crc_fixture;

static void *setup(void)
{
csp_init();

return &crc_fixture;
}

static void before(void *data)
{
struct crc_fixture *fixture = data;

fixture->buf = csp_buffer_get(0);
zassert_true(fixture->buf != NULL, NULL);
}

static void after(void *data)
{
struct crc_fixture *fixture = data;

csp_buffer_free(fixture->buf);
}

ZTEST_F(crc, test_crc_verify_without_crc)
{
csp_packet_t *packet = fixture->buf;
int ret;

/* Check size error */
packet->length = 0;
ret = csp_crc32_verify(packet);
zassert_equal(ret, CSP_ERR_CRC32, "Expected error on size in csp_crc32_verify");

/* Check without crc */
memcpy(packet->data, "Hello", 5);
packet->length = 5;
ret = csp_crc32_verify(packet);
zassert_equal(ret, CSP_ERR_CRC32, "Expected error on crc in csp_crc32_verify");
}

ZTEST_F(crc, test_crc_without_header)
{
csp_packet_t *packet = fixture->buf;
int ret;

memcpy(packet->data, "Hello", 5);
packet->length = 5;

/* Check without header */
csp_crc32_append(packet);
ret = csp_crc32_verify(packet);
zassert_equal(CSP_ERR_NONE, ret, "Error on csp_crc32_verify");
}

ZTEST_F(crc, test_crc_with_header)
{
csp_packet_t *packet = fixture->buf;
uint32_t crc;
int ret;

memcpy(packet->data, "Hello", 5);
packet->length = 5;

/* Check with header.
* This simulate CSP_21 define on csp_crc32_append().
*/
csp_id_prepend(packet);
crc = csp_crc32_memory(packet->frame_begin, packet->frame_length);
/* Convert to network byte order */
crc = htobe32(crc);
/* Copy checksum to packet */
memcpy(&packet->data[packet->length], &crc, sizeof(crc));
packet->length += sizeof(crc);

ret = csp_crc32_verify(packet);
zassert_equal(CSP_ERR_NONE, ret, "Error on csp_crc32_verify");
}

ZTEST_SUITE(crc, NULL, setup, before, after, NULL);