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/*
* ngtcp2
*
* Copyright (c) 2025 ngtcp2 contributors
* Copyright (c) 2023 nghttp2 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_ratelim_test.h"
#include <stdio.h>
#include "munit.h"
#include "ngtcp2_ratelim.h"
#include "ngtcp2_test_helper.h"
static const MunitTest tests[] = {
munit_void_test(test_ngtcp2_ratelim_drain),
munit_test_end(),
};
const MunitSuite ratelim_suite = {
"/ratelim", tests, NULL, 1, MUNIT_SUITE_OPTION_NONE,
};
void test_ngtcp2_ratelim_drain(void) {
ngtcp2_ratelim rlim;
ngtcp2_tstamp ts = 0;
int rv;
ngtcp2_ratelim_init(&rlim, 1000, 33, ts);
assert_uint64(1000, ==, rlim.tokens);
assert_uint64(1000, ==, rlim.burst);
assert_uint64(33, ==, rlim.rate);
assert_uint64(0, ==, rlim.ts);
rv = ngtcp2_ratelim_drain(&rlim, 100, ts);
assert_int(0, ==, rv);
assert_uint64(900, ==, rlim.tokens);
ts += NGTCP2_SECONDS;
rv = ngtcp2_ratelim_drain(&rlim, 10, ts);
assert_int(0, ==, rv);
assert_uint64(923, ==, rlim.tokens);
ts += 100 * NGTCP2_MILLISECONDS;
rv = ngtcp2_ratelim_drain(&rlim, 5, ts);
assert_int(0, ==, rv);
assert_uint64(921, ==, rlim.tokens);
assert_uint64(300000000, ==, rlim.carry);
ts += 500 * NGTCP2_MILLISECONDS;
rv = ngtcp2_ratelim_drain(&rlim, 5, ts);
assert_int(0, ==, rv);
assert_uint64(932, ==, rlim.tokens);
assert_uint64(800000000, ==, rlim.carry);
ts += 400 * NGTCP2_MILLISECONDS;
rv = ngtcp2_ratelim_drain(&rlim, 1, ts);
assert_int(0, ==, rv);
assert_uint64(945, ==, rlim.tokens);
assert_uint64(0, ==, rlim.carry);
rv = ngtcp2_ratelim_drain(&rlim, 946, ts);
assert_int(-1, ==, rv);
rv = ngtcp2_ratelim_drain(&rlim, 945, ts);
assert_int(0, ==, rv);
assert_uint64(0, ==, rlim.tokens);
assert_uint64(0, ==, rlim.carry);
ts += 30400 * NGTCP2_MILLISECONDS;
rv = ngtcp2_ratelim_drain(&rlim, 0, ts);
assert_int(0, ==, rv);
assert_uint64(1000, ==, rlim.tokens);
assert_uint64(0, ==, rlim.carry);
/* Overflow */
ngtcp2_ratelim_init(&rlim, UINT64_MAX - 1, UINT64_MAX, ts);
assert_uint64(UINT64_MAX - 1, ==, rlim.tokens);
assert_uint64(UINT64_MAX - 1, ==, rlim.burst);
assert_uint64(UINT64_MAX, ==, rlim.rate);
assert_uint64(ts, ==, rlim.ts);
ts += 2;
rv = ngtcp2_ratelim_drain(&rlim, 1, ts);
assert_int(0, ==, rv);
assert_uint64(UINT64_MAX - 2, ==, rlim.tokens);
}
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