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Add some glass-box tests for the last_with_data code.

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Nick Mathewson 2010-03-11 15:39:44 -05:00
parent 1e7b986827
commit 17da042db6
1 changed files with 77 additions and 0 deletions
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77
test/regress_buffer.c
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@ -328,6 +328,80 @@ end:
evbuffer_free(buf);
}
static void
test_evbuffer_reserve_many(void *ptr)
{
/* This is a glass-box test to handle expanding a buffer with more
* chunks and reallocating chunks as needed */
struct evbuffer *buf = evbuffer_new();
struct evbuffer_iovec v[8];
int n;
size_t sz;
int add_data = ptr && !strcmp(ptr, "add");
int fill_first = ptr && !strcmp(ptr, "fill");
char *cp1, *cp2;
/* When reserving the the first chunk, we just allocate it */
n = evbuffer_reserve_space(buf, 128, v, 2);
evbuffer_validate(buf);
tt_int_op(n, ==, 1);
tt_assert(v[0].iov_len >= 128);
sz = v[0].iov_len;
cp1 = v[0].iov_base;
if (add_data) {
*(char*)v[0].iov_base = 'X';
v[0].iov_len = 1;
n = evbuffer_commit_space(buf, v, 1);
tt_int_op(n, ==, 0);
} else if (fill_first) {
memset(v[0].iov_base, 'X', v[0].iov_len);
n = evbuffer_commit_space(buf, v, 1);
tt_int_op(n, ==, 0);
n = evbuffer_reserve_space(buf, 128, v, 2);
tt_int_op(n, ==, 1);
sz = v[0].iov_len;
tt_assert(v[0].iov_base != cp1);
cp1 = v[0].iov_base;
}
/* Make another chunk get added. */
n = evbuffer_reserve_space(buf, sz+128, v, 2);
evbuffer_validate(buf);
tt_int_op(n, ==, 2);
sz = v[0].iov_len + v[1].iov_len;
tt_int_op(sz, >=, v[0].iov_len+128);
if (add_data) {
tt_assert(v[0].iov_base == cp1 + 1);
} else {
tt_assert(v[0].iov_base == cp1);
}
cp1 = v[0].iov_base;
cp2 = v[1].iov_base;
/* And a third chunk. */
n = evbuffer_reserve_space(buf, sz+128, v, 3);
evbuffer_validate(buf);
tt_int_op(n, ==, 3);
tt_assert(cp1 == v[0].iov_base);
tt_assert(cp2 == v[1].iov_base);
sz = v[0].iov_len + v[1].iov_len + v[2].iov_len;
/* Now force a reallocation by asking for more space in only 2
* buffers. */
n = evbuffer_reserve_space(buf, sz+128, v, 2);
evbuffer_validate(buf);
if (add_data) {
tt_int_op(n, ==, 2);
tt_assert(cp1 == v[0].iov_base);
} else {
tt_int_op(n, ==, 1);
}
end:
evbuffer_free(buf);
}
static int reference_cb_called;
static void
reference_cb(const void *data, size_t len, void *extra)
@ -1277,6 +1351,9 @@ static const struct testcase_setup_t nil_setup = {
struct testcase_t evbuffer_testcases[] = {
{ "evbuffer", test_evbuffer, 0, NULL, NULL },
{ "reserve2", test_evbuffer_reserve2, 0, NULL, NULL },
{ "reserve_many", test_evbuffer_reserve_many, 0, NULL, NULL },
{ "reserve_many2", test_evbuffer_reserve_many, 0, &nil_setup, (void*)"add" },
{ "reserve_many3", test_evbuffer_reserve_many, 0, &nil_setup, (void*)"fill" },
{ "reference", test_evbuffer_reference, 0, NULL, NULL },
{ "iterative", test_evbuffer_iterative, 0, NULL, NULL },
{ "readln", test_evbuffer_readln, TT_NO_LOGS, &basic_setup, NULL },