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test-iov: add iov_discard_front/back() testcases

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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2012-11-21 19:18:26 +01:00
parent d02776350d
commit 8962e44fe4
1 changed files with 150 additions and 0 deletions
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150
tests/test-iov.c
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@ -250,11 +250,161 @@ static void test_io(void)
#endif
}
static void test_discard_front(void)
{
struct iovec *iov;
struct iovec *iov_tmp;
unsigned int iov_cnt;
unsigned int iov_cnt_tmp;
void *old_base;
size_t size;
size_t ret;
/* Discard zero bytes */
iov_random(&iov, &iov_cnt);
iov_tmp = iov;
iov_cnt_tmp = iov_cnt;
ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, 0);
g_assert(ret == 0);
g_assert(iov_tmp == iov);
g_assert(iov_cnt_tmp == iov_cnt);
iov_free(iov, iov_cnt);
/* Discard more bytes than vector size */
iov_random(&iov, &iov_cnt);
iov_tmp = iov;
iov_cnt_tmp = iov_cnt;
size = iov_size(iov, iov_cnt);
ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size + 1);
g_assert(ret == size);
g_assert(iov_cnt_tmp == 0);
iov_free(iov, iov_cnt);
/* Discard entire vector */
iov_random(&iov, &iov_cnt);
iov_tmp = iov;
iov_cnt_tmp = iov_cnt;
size = iov_size(iov, iov_cnt);
ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size);
g_assert(ret == size);
g_assert(iov_cnt_tmp == 0);
iov_free(iov, iov_cnt);
/* Discard within first element */
iov_random(&iov, &iov_cnt);
iov_tmp = iov;
iov_cnt_tmp = iov_cnt;
old_base = iov->iov_base;
size = g_test_rand_int_range(1, iov->iov_len);
ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size);
g_assert(ret == size);
g_assert(iov_tmp == iov);
g_assert(iov_cnt_tmp == iov_cnt);
g_assert(iov_tmp->iov_base == old_base + size);
iov_tmp->iov_base = old_base; /* undo before g_free() */
iov_free(iov, iov_cnt);
/* Discard entire first element */
iov_random(&iov, &iov_cnt);
iov_tmp = iov;
iov_cnt_tmp = iov_cnt;
ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, iov->iov_len);
g_assert(ret == iov->iov_len);
g_assert(iov_tmp == iov + 1);
g_assert(iov_cnt_tmp == iov_cnt - 1);
iov_free(iov, iov_cnt);
/* Discard within second element */
iov_random(&iov, &iov_cnt);
iov_tmp = iov;
iov_cnt_tmp = iov_cnt;
old_base = iov[1].iov_base;
size = iov->iov_len + g_test_rand_int_range(1, iov[1].iov_len);
ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size);
g_assert(ret == size);
g_assert(iov_tmp == iov + 1);
g_assert(iov_cnt_tmp == iov_cnt - 1);
g_assert(iov_tmp->iov_base == old_base + (size - iov->iov_len));
iov_tmp->iov_base = old_base; /* undo before g_free() */
iov_free(iov, iov_cnt);
}
static void test_discard_back(void)
{
struct iovec *iov;
unsigned int iov_cnt;
unsigned int iov_cnt_tmp;
void *old_base;
size_t size;
size_t ret;
/* Discard zero bytes */
iov_random(&iov, &iov_cnt);
iov_cnt_tmp = iov_cnt;
ret = iov_discard_back(iov, &iov_cnt_tmp, 0);
g_assert(ret == 0);
g_assert(iov_cnt_tmp == iov_cnt);
iov_free(iov, iov_cnt);
/* Discard more bytes than vector size */
iov_random(&iov, &iov_cnt);
iov_cnt_tmp = iov_cnt;
size = iov_size(iov, iov_cnt);
ret = iov_discard_back(iov, &iov_cnt_tmp, size + 1);
g_assert(ret == size);
g_assert(iov_cnt_tmp == 0);
iov_free(iov, iov_cnt);
/* Discard entire vector */
iov_random(&iov, &iov_cnt);
iov_cnt_tmp = iov_cnt;
size = iov_size(iov, iov_cnt);
ret = iov_discard_back(iov, &iov_cnt_tmp, size);
g_assert(ret == size);
g_assert(iov_cnt_tmp == 0);
iov_free(iov, iov_cnt);
/* Discard within last element */
iov_random(&iov, &iov_cnt);
iov_cnt_tmp = iov_cnt;
old_base = iov[iov_cnt - 1].iov_base;
size = g_test_rand_int_range(1, iov[iov_cnt - 1].iov_len);
ret = iov_discard_back(iov, &iov_cnt_tmp, size);
g_assert(ret == size);
g_assert(iov_cnt_tmp == iov_cnt);
g_assert(iov[iov_cnt - 1].iov_base == old_base);
iov_free(iov, iov_cnt);
/* Discard entire last element */
iov_random(&iov, &iov_cnt);
iov_cnt_tmp = iov_cnt;
old_base = iov[iov_cnt - 1].iov_base;
size = iov[iov_cnt - 1].iov_len;
ret = iov_discard_back(iov, &iov_cnt_tmp, size);
g_assert(ret == size);
g_assert(iov_cnt_tmp == iov_cnt - 1);
iov_free(iov, iov_cnt);
/* Discard within second-to-last element */
iov_random(&iov, &iov_cnt);
iov_cnt_tmp = iov_cnt;
old_base = iov[iov_cnt - 2].iov_base;
size = iov[iov_cnt - 1].iov_len +
g_test_rand_int_range(1, iov[iov_cnt - 2].iov_len);
ret = iov_discard_back(iov, &iov_cnt_tmp, size);
g_assert(ret == size);
g_assert(iov_cnt_tmp == iov_cnt - 1);
g_assert(iov[iov_cnt - 2].iov_base == old_base);
iov_free(iov, iov_cnt);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
g_test_rand_int();
g_test_add_func("/basic/iov/from-to-buf", test_to_from_buf);
g_test_add_func("/basic/iov/io", test_io);
g_test_add_func("/basic/iov/discard-front", test_discard_front);
g_test_add_func("/basic/iov/discard-back", test_discard_back);
return g_test_run();
}