59 lines
2.0 KiB
C#
59 lines
2.0 KiB
C#
// Copyright 2021-2025 The NATS Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using Shouldly;
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using ZB.MOM.NatsNet.Server.Internal;
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namespace ZB.MOM.NatsNet.Server.Tests.Internal;
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/// <summary>
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/// Tests for <see cref="RateCounter"/>.
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/// Mirrors server/rate_counter_test.go: TestRateCounter (ID 2720).
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/// </summary>
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public sealed class RateCounterTests
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{
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[Fact]
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public void NewRateCounter_ShouldCreateWithDefaultInterval()
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{
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var counter = RateCounter.NewRateCounter(2);
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counter.Interval.ShouldBe(TimeSpan.FromSeconds(1));
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counter.Allow().ShouldBeTrue();
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counter.Allow().ShouldBeTrue();
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counter.Allow().ShouldBeFalse();
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}
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[Fact]
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public async Task RateCounter_ShouldAllowUpToLimitThenBlockAndReset()
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{
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// Mirror: TestRateCounter
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var counter = new RateCounter(10) { Interval = TimeSpan.FromMilliseconds(100) };
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// First 10 calls should be allowed (counts 0–9 < limit 10).
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for (var i = 0; i < 10; i++)
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counter.Allow().ShouldBeTrue($"should allow on iteration {i}");
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// Next 5 should be blocked.
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for (var i = 0; i < 5; i++)
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counter.Allow().ShouldBeFalse($"should not allow on iteration {i}");
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// countBlocked returns and resets the blocked count.
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counter.CountBlocked().ShouldBe(5UL);
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counter.CountBlocked().ShouldBe(0UL);
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// After the window expires, should allow again.
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await Task.Delay(150);
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counter.Allow().ShouldBeTrue("should allow after window expired");
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}
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}
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