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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. You may not use this file except in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Copyright (C) 2022 ScyllaDB
*/
#include <seastar/core/thread.hh>
#include <seastar/core/manual_clock.hh>
#include <seastar/testing/test_case.hh>
#include <seastar/util/shared_token_bucket.hh>
using namespace seastar;
using namespace std::chrono_literals;
SEASTAR_TEST_CASE(test_basic_non_capped_loop) {
internal::shared_token_bucket<uint64_t, std::ratio<1>, internal::capped_release::no, manual_clock> tb(1, 1, 0, false);
// Grab one token and make sure it's only available in 1s
auto th = tb.grab(1);
BOOST_REQUIRE(tb.deficiency(th) > 0);
manual_clock::advance(1s);
tb.replenish(manual_clock::now());
BOOST_REQUIRE(tb.deficiency(th) == 0);
// Grab one more token and check the same
th = tb.grab(1);
BOOST_REQUIRE(tb.deficiency(th) > 0);
manual_clock::advance(1s);
tb.replenish(manual_clock::now());
BOOST_REQUIRE(tb.deficiency(th) == 0);
return make_ready_future<>();
}
SEASTAR_TEST_CASE(test_basic_capped_loop) {
internal::shared_token_bucket<uint64_t, std::ratio<1>, internal::capped_release::yes, manual_clock> tb(1, 1, 0, false);
// Grab on token and make sure it's only available in 1s
auto th = tb.grab(1);
BOOST_REQUIRE(tb.deficiency(th) > 0);
manual_clock::advance(1s);
tb.replenish(manual_clock::now());
BOOST_REQUIRE(tb.deficiency(th) == 0);
// The 2nd time this trick only works after the 1st token is explicitly released
th = tb.grab(1);
BOOST_REQUIRE(tb.deficiency(th) > 0);
manual_clock::advance(1s);
tb.replenish(manual_clock::now());
BOOST_REQUIRE(tb.deficiency(th) > 0);
manual_clock::advance(1s);
tb.release(1);
tb.replenish(manual_clock::now());
BOOST_REQUIRE(tb.deficiency(th) == 0);
return make_ready_future<>();
}
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