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/*
* ngtcp2
*
* Copyright (c) 2024 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ngtcp2_window_filter_test.h"
#include <stdio.h>
#include <assert.h>
#include "ngtcp2_window_filter.h"
#include "ngtcp2_test_helper.h"
static const MunitTest tests[] = {
munit_void_test(test_ngtcp2_window_filter_update),
munit_test_end(),
};
const MunitSuite window_filter_suite = {
.prefix = "/window_filter",
.tests = tests,
};
void test_ngtcp2_window_filter_update(void) {
ngtcp2_window_filter wf;
ngtcp2_window_filter_init(&wf, 8);
ngtcp2_window_filter_update(&wf, 100, 0);
assert_uint64(100, ==, wf.estimates[0].sample);
assert_uint64(0, ==, wf.estimates[0].time);
assert_uint64(100, ==, wf.estimates[1].sample);
assert_uint64(0, ==, wf.estimates[1].time);
assert_uint64(100, ==, wf.estimates[2].sample);
assert_uint64(0, ==, wf.estimates[2].time);
assert_uint64(100, ==, ngtcp2_window_filter_get_best(&wf));
/* A quarter of window has not passed. New sample which is not the
best is discarded. */
ngtcp2_window_filter_update(&wf, 90, 1);
assert_uint64(100, ==, wf.estimates[0].sample);
assert_uint64(0, ==, wf.estimates[0].time);
assert_uint64(100, ==, wf.estimates[1].sample);
assert_uint64(0, ==, wf.estimates[1].time);
assert_uint64(100, ==, wf.estimates[2].sample);
assert_uint64(0, ==, wf.estimates[2].time);
assert_uint64(100, ==, ngtcp2_window_filter_get_best(&wf));
/* A quarter of the window has passed without a better sample. */
ngtcp2_window_filter_update(&wf, 90, 3);
assert_uint64(100, ==, wf.estimates[0].sample);
assert_uint64(0, ==, wf.estimates[0].time);
assert_uint64(90, ==, wf.estimates[1].sample);
assert_uint64(3, ==, wf.estimates[1].time);
assert_uint64(90, ==, wf.estimates[2].sample);
assert_uint64(3, ==, wf.estimates[2].time);
assert_uint64(100, ==, ngtcp2_window_filter_get_best(&wf));
/* A half of the window has passed without a better sample. */
ngtcp2_window_filter_update(&wf, 80, 8);
assert_uint64(100, ==, wf.estimates[0].sample);
assert_uint64(0, ==, wf.estimates[0].time);
assert_uint64(90, ==, wf.estimates[1].sample);
assert_uint64(3, ==, wf.estimates[1].time);
assert_uint64(80, ==, wf.estimates[2].sample);
assert_uint64(8, ==, wf.estimates[2].time);
assert_uint64(100, ==, ngtcp2_window_filter_get_best(&wf));
/* The best sample has expired. */
ngtcp2_window_filter_update(&wf, 70, 9);
assert_uint64(90, ==, wf.estimates[0].sample);
assert_uint64(3, ==, wf.estimates[0].time);
assert_uint64(80, ==, wf.estimates[1].sample);
assert_uint64(8, ==, wf.estimates[1].time);
assert_uint64(70, ==, wf.estimates[2].sample);
assert_uint64(9, ==, wf.estimates[2].time);
assert_uint64(90, ==, ngtcp2_window_filter_get_best(&wf));
/* Update third estimate. */
ngtcp2_window_filter_update(&wf, 75, 9);
assert_uint64(90, ==, wf.estimates[0].sample);
assert_uint64(3, ==, wf.estimates[0].time);
assert_uint64(80, ==, wf.estimates[1].sample);
assert_uint64(8, ==, wf.estimates[1].time);
assert_uint64(75, ==, wf.estimates[2].sample);
assert_uint64(9, ==, wf.estimates[2].time);
assert_uint64(90, ==, ngtcp2_window_filter_get_best(&wf));
/* Update second and third estimates. */
ngtcp2_window_filter_update(&wf, 85, 9);
assert_uint64(90, ==, wf.estimates[0].sample);
assert_uint64(3, ==, wf.estimates[0].time);
assert_uint64(85, ==, wf.estimates[1].sample);
assert_uint64(9, ==, wf.estimates[1].time);
assert_uint64(85, ==, wf.estimates[2].sample);
assert_uint64(9, ==, wf.estimates[2].time);
assert_uint64(90, ==, ngtcp2_window_filter_get_best(&wf));
/* Update all estimates because new sample is the best estimate. */
ngtcp2_window_filter_update(&wf, 100, 10);
assert_uint64(100, ==, wf.estimates[0].sample);
assert_uint64(10, ==, wf.estimates[0].time);
assert_uint64(100, ==, wf.estimates[1].sample);
assert_uint64(10, ==, wf.estimates[1].time);
assert_uint64(100, ==, wf.estimates[2].sample);
assert_uint64(10, ==, wf.estimates[2].time);
assert_uint64(100, ==, ngtcp2_window_filter_get_best(&wf));
}
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