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Add unit tests for inet_csum_slice()

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Ken Bannister 2015-11-27 23:50:09 -05:00
parent 835a2d8a27
commit 0cd5bf9b8f
1 changed files with 46 additions and 0 deletions
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46
tests/unittests/tests-inet_csum/tests-inet_csum.c
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@ -121,6 +121,50 @@ static void test_inet_csum__odd_len(void)
TEST_ASSERT_EQUAL_INT(0xffff, inet_csum(17 + 39, data, sizeof(data)));
}
static void test_inet_csum__two_app_snips(void)
{
/* CoAP header with Uri-Path and Content-Format options; odd length */
uint8_t data_hdr[] = {
0x50, 0x02, 0x00, 0x01, 0xb4, 0x74, 0x65, 0x73,
0x74, 0x10, 0xff,
};
/* Single character payload, 'a' */
uint8_t data_pyld[] = {
0x61,
};
uint16_t hdr_sum, pyld_sum, hdr_expected = 0xdcfc;
/* result unnormalized:
* initial sum (0) is arbitrary, and incoming length (0) must be even;
* we expect last byte is shifted left for this odd-sized header */
hdr_sum = inet_csum_slice(0, data_hdr, sizeof(data_hdr), 0);
TEST_ASSERT_EQUAL_INT(hdr_expected, hdr_sum);
/* Since header was odd length, we expect the single byte in the payload
* snip is not shifted left */
pyld_sum = inet_csum_slice(hdr_expected, data_pyld, sizeof(data_pyld), sizeof(data_hdr));
TEST_ASSERT_EQUAL_INT(hdr_expected + 0x61, pyld_sum);
}
static void test_inet_csum__empty_app_buffer(void)
{
/* CoAP header with Uri-Path and Content-Format options; odd length */
uint8_t data_hdr[] = {
0x50, 0x02, 0x00, 0x01, 0xb4, 0x74, 0x65, 0x73,
0x74, 0x10, 0xff,
};
uint16_t hdr_sum, pyld_sum, hdr_expected = 0xdcfc;
/* result unnormalized:
* explictly using an odd-sized header for the first slice, to setup corner case */
hdr_sum = inet_csum_slice(0, data_hdr, sizeof(data_hdr), 0);
TEST_ASSERT_EQUAL_INT(hdr_expected, hdr_sum);
/* expect an empty buffer simply to reflect the incoming checksum */
pyld_sum = inet_csum_slice(hdr_expected, NULL, 0, sizeof(data_hdr));
TEST_ASSERT_EQUAL_INT(hdr_expected, pyld_sum);
}
Test *tests_inet_csum_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
@ -130,6 +174,8 @@ Test *tests_inet_csum_tests(void)
new_TestFixture(test_inet_csum__wraps_more_than_once),
new_TestFixture(test_inet_csum__calculate_csum),
new_TestFixture(test_inet_csum__odd_len),
new_TestFixture(test_inet_csum__two_app_snips),
new_TestFixture(test_inet_csum__empty_app_buffer),
};
EMB_UNIT_TESTCALLER(inet_csum_tests, NULL, NULL, fixtures);