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Implement channel queue size estimate unit test

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This commit is contained in:
Andrea Shepard 2013-12-18 13:42:02 -08:00
parent 6d886787e3
commit 6e427c30af
1 changed files with 143 additions and 0 deletions
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143
src/test/test_channel.c
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@ -18,11 +18,13 @@
static int test_chan_accept_cells = 0;
static int test_cells_written = 0;
static int test_destroy_not_pending_calls = 0;
static double test_overhead_estimate = 1.0f;
static void channel_note_destroy_not_pending_mock(channel_t *ch,
circid_t circid);
static void chan_test_close(channel_t *ch);
static size_t chan_test_num_bytes_queued(channel_t *ch);
static int chan_test_num_cells_writeable(channel_t *ch);
static int chan_test_write_cell(channel_t *ch, cell_t *cell);
static int chan_test_write_packed_cell(channel_t *ch,
packed_cell_t *packed_cell);
@ -31,6 +33,7 @@ static void make_fake_cell(cell_t *c);
static void make_fake_var_cell(var_cell_t *c);
static channel_t * new_fake_channel(void);
static void scheduler_release_channel_mock(channel_t *ch);
static void test_channel_queue_size(void *arg);
static void test_channel_write(void *arg);
static void
@ -52,6 +55,15 @@ chan_test_close(channel_t *ch)
return;
}
static double
chan_test_get_overhead_estimate(channel_t *ch)
{
test_assert(ch);
done:
return test_overhead_estimate;
}
static size_t
chan_test_num_bytes_queued(channel_t *ch)
{
@ -61,6 +73,15 @@ chan_test_num_bytes_queued(channel_t *ch)
return 0;
}
static int
chan_test_num_cells_writeable(channel_t *ch)
{
test_assert(ch);
done:
return 32;
}
static int
chan_test_write_cell(channel_t *ch, cell_t *cell)
{
@ -156,7 +177,9 @@ new_fake_channel(void)
channel_init(chan);
chan->close = chan_test_close;
chan->get_overhead_estimate = chan_test_get_overhead_estimate;
chan->num_bytes_queued = chan_test_num_bytes_queued;
chan->num_cells_writeable = chan_test_num_cells_writeable;
chan->write_cell = chan_test_write_cell;
chan->write_packed_cell = chan_test_write_packed_cell;
chan->write_var_cell = chan_test_write_var_cell;
@ -176,6 +199,125 @@ scheduler_release_channel_mock(channel_t *ch)
return;
}
static void
test_channel_queue_size(void *arg)
{
channel_t *ch = NULL;
cell_t *cell = NULL;
int n, old_count;
uint64_t global_queue_estimate;
(void)arg;
ch = new_fake_channel();
test_assert(ch);
/* Initial queue size update */
channel_update_xmit_queue_size(ch);
test_eq(ch->bytes_queued_for_xmit, 0);
global_queue_estimate = channel_get_global_queue_estimate();
test_eq(global_queue_estimate, 0);
/* Test the call-through to our fake lower layer */
n = channel_num_cells_writeable(ch);
/* chan_test_num_cells_writeable() always returns 32 */
test_eq(n, 32);
/*
* Now we queue some cells and check that channel_num_cells_writeable()
* adjusts properly
*/
/* tell it not to accept cells */
test_chan_accept_cells = 0;
/* ...and keep it from trying to flush the queue */
ch->state = CHANNEL_STATE_MAINT;
/* Get a fresh cell */
cell = tor_malloc_zero(sizeof(cell_t));
make_fake_cell(cell);
old_count = test_cells_written;
channel_write_cell(ch, cell);
/* Assert that it got queued, not written through, correctly */
test_eq(test_cells_written, old_count);
/* Now check chan_test_num_cells_writeable() again */
n = channel_num_cells_writeable(ch);
test_eq(n, 0); /* Should return 0 since we're in CHANNEL_STATE_MAINT */
/* Update queue size estimates */
channel_update_xmit_queue_size(ch);
/* One cell, times an overhead factor of 1.0 */
test_eq(ch->bytes_queued_for_xmit, 512);
/* Try a different overhead factor */
test_overhead_estimate = 0.5f;
/* This one should be ignored since it's below 1.0 */
channel_update_xmit_queue_size(ch);
test_eq(ch->bytes_queued_for_xmit, 512);
/* Now try a larger one */
test_overhead_estimate = 2.0f;
channel_update_xmit_queue_size(ch);
test_eq(ch->bytes_queued_for_xmit, 1024);
/* Go back to 1.0 */
test_overhead_estimate = 1.0f;
channel_update_xmit_queue_size(ch);
test_eq(ch->bytes_queued_for_xmit, 512);
/* Check the global estimate too */
global_queue_estimate = channel_get_global_queue_estimate();
test_eq(global_queue_estimate, 512);
/* Go to open */
old_count = test_cells_written;
channel_change_state(ch, CHANNEL_STATE_OPEN);
/*
* It should try to write, but we aren't accepting cells right now, so
* it'll requeue
*/
test_eq(test_cells_written, old_count);
/* Check the queue size again */
channel_update_xmit_queue_size(ch);
test_eq(ch->bytes_queued_for_xmit, 512);
global_queue_estimate = channel_get_global_queue_estimate();
test_eq(global_queue_estimate, 512);
/*
* Now the cell is in the queue, and we're open, so we should get 31
* writeable cells.
*/
n = channel_num_cells_writeable(ch);
test_eq(n, 31);
/* Accept cells again */
test_chan_accept_cells = 1;
/* ...and re-process the queue */
old_count = test_cells_written;
channel_flush_cells(ch);
test_eq(test_cells_written, old_count + 1);
/* Should have 32 writeable now */
n = channel_num_cells_writeable(ch);
test_eq(n, 32);
/* Should have queue size estimate of zero */
channel_update_xmit_queue_size(ch);
test_eq(ch->bytes_queued_for_xmit, 0);
global_queue_estimate = channel_get_global_queue_estimate();
test_eq(global_queue_estimate, 0);
/* Okay, now we're done with this one */
MOCK(scheduler_release_channel, scheduler_release_channel_mock);
channel_mark_for_close(ch);
UNMOCK(scheduler_release_channel);
done:
tor_free(ch);
return;
}
static void
test_channel_write(void *arg)
{
@ -289,6 +431,7 @@ test_channel_write(void *arg)
}
struct testcase_t channel_tests[] = {
{ "queue_size", test_channel_queue_size, TT_FORK, NULL, NULL },
{ "write", test_channel_write, TT_FORK, NULL, NULL },
END_OF_TESTCASES
};