65 lines
2.8 KiB
C#
65 lines
2.8 KiB
C#
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using VoiceCat.Server.Transport;
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using Voicecat.V1;
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namespace VoiceCat.Tests;
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public class PacketLossTrackerTests
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{
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[Fact]
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public void FastModeReportsWindowedLossAndCapsExtremeValues()
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{
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var clock = new ManualClock();
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var tracker = new PacketLossTracker(clock);
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Assert.Null(tracker.Observe(0, 1, PacketLossMode.PacketLossAutoFast));
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for (ulong sequence = 1; sequence <= 100; sequence++)
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if (sequence % 10 != 0) Assert.Null(tracker.Observe(sequence, 1, PacketLossMode.PacketLossAutoFast));
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clock.Advance(TimeSpan.FromSeconds(3));
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PacketLossSample sample = Assert.IsType<PacketLossSample>(tracker.Observe(101, 1, PacketLossMode.PacketLossAutoFast));
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Assert.Equal(10U, sample.MeasuredPercent);
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Assert.Equal(10U, sample.AppliedPercent);
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tracker = new(clock);
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Assert.Null(tracker.Observe(0, 1, PacketLossMode.PacketLossAutoFast));
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clock.Advance(TimeSpan.FromSeconds(3));
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sample = Assert.IsType<PacketLossSample>(tracker.Observe(100, 1, PacketLossMode.PacketLossAutoFast));
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Assert.Equal(99U, sample.MeasuredPercent);
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Assert.Equal(30U, sample.AppliedPercent);
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}
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[Fact]
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public void ReorderingDoesNotCountAsLossAndStableModeWaitsForItsWindow()
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{
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var clock = new ManualClock();
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var tracker = new PacketLossTracker(clock);
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tracker.Observe(0, 1, PacketLossMode.PacketLossAutoStable);
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tracker.Observe(2, 1, PacketLossMode.PacketLossAutoStable);
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tracker.Observe(1, 1, PacketLossMode.PacketLossAutoStable);
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for (ulong sequence = 3; sequence <= 30; sequence++) tracker.Observe(sequence, 1, PacketLossMode.PacketLossAutoStable);
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clock.Advance(TimeSpan.FromSeconds(29));
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Assert.Null(tracker.Observe(31, 1, PacketLossMode.PacketLossAutoStable));
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clock.Advance(TimeSpan.FromSeconds(1));
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PacketLossSample sample = Assert.IsType<PacketLossSample>(tracker.Observe(32, 1, PacketLossMode.PacketLossAutoStable));
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Assert.Equal(0U, sample.MeasuredPercent);
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}
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[Fact]
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public void ManualModeAndChannelChangesResetMeasurement()
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{
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var clock = new ManualClock();
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var tracker = new PacketLossTracker(clock);
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tracker.Observe(0, 1, PacketLossMode.PacketLossAutoFast);
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clock.Advance(TimeSpan.FromSeconds(3));
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Assert.Null(tracker.Observe(100, 2, PacketLossMode.PacketLossAutoFast));
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Assert.Null(tracker.Observe(101, 2, PacketLossMode.PacketLossManual));
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}
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private sealed class ManualClock : TimeProvider
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{
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private long timestamp;
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public override long TimestampFrequency => 1_000;
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public override long GetTimestamp() => timestamp;
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internal void Advance(TimeSpan duration) => timestamp += (long)duration.TotalMilliseconds;
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}
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}
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