alexei.dolgolyov
68f3229c35
- Add SuspensionFreezeDetector via the IAnomalyDetector seam: a suspension gap with the favourite unchanged and a negligible (< threshold) price move — the mirror of the flip. Score = how completely the line froze. Reuses MatchWinEvidence so UI + evaluator handle it unchanged. 6 tests. - Add AnomalyKind.SuspensionFreeze + localized card/detail label, SuspensionFreezeThreshold option, and fan it into DetectAnomaliesUseCase.
105 lines
3.4 KiB
C#
105 lines
3.4 KiB
C#
using FluentAssertions;
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using Marathon.Domain.AnomalyDetection;
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using Marathon.Domain.Entities;
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using Marathon.Domain.Enums;
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using Marathon.Domain.ValueObjects;
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namespace Marathon.Domain.Tests.AnomalyDetection;
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public sealed class SuspensionFreezeDetectorTests
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{
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private static readonly TimeSpan MoscowOffset = TimeSpan.FromHours(3);
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private static readonly DateTimeOffset BaseTime = new(2026, 5, 10, 18, 0, 0, MoscowOffset);
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private static readonly EventId Event = new("26000002");
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// suspension gap 60s, freeze threshold 0.05, min 3 snapshots.
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private static SuspensionFreezeDetector CreateSut() => new(60, 0.05m, 3);
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private static OddsSnapshot Live(int seconds, decimal r1, decimal r2) =>
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new(Event, BaseTime.AddSeconds(seconds), OddsSource.Live,
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new List<Bet>
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{
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new(MatchScope.Instance, BetType.Win, Side.Side1, null, new OddsRate(r1)),
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new(MatchScope.Instance, BetType.Win, Side.Side2, null, new OddsRate(r2)),
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});
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[Fact]
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public void Should_FlagFreeze_When_SuspensionResumesUnchanged()
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{
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// 90s gap between the 2nd and 3rd snapshot; line resumes identical.
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var snapshots = new[]
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{
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Live(0, 1.5m, 3.0m),
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Live(30, 1.5m, 3.0m),
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Live(120, 1.5m, 3.0m), // 90s gap, unchanged
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Live(150, 1.5m, 3.0m),
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};
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var result = CreateSut().Detect(Event, snapshots);
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result.Should().ContainSingle();
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result[0].Kind.Should().Be(AnomalyKind.SuspensionFreeze);
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result[0].Score.Should().Be(1.0m, "an unchanged line is a complete freeze");
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}
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[Fact]
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public void Should_NotFlag_When_FlipAcrossSuspension()
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{
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// Favourite changes across the gap — that is the SuspensionFlip detector's job.
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var snapshots = new[]
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{
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Live(0, 1.3m, 4.0m),
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Live(30, 1.3m, 4.0m),
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Live(120, 4.0m, 1.3m), // 90s gap, flipped
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Live(150, 4.0m, 1.3m),
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};
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CreateSut().Detect(Event, snapshots).Should().BeEmpty();
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}
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[Fact]
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public void Should_NotFlag_When_NoSuspensionGap()
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{
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// Continuous 30s steps — no gap exceeds the 60s suspension threshold.
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var snapshots = new[]
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{
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Live(0, 1.5m, 3.0m),
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Live(30, 1.5m, 3.0m),
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Live(60, 1.5m, 3.0m),
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};
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CreateSut().Detect(Event, snapshots).Should().BeEmpty();
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}
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[Fact]
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public void Should_ReturnEmpty_When_FewerThanMinSnapshots()
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{
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var snapshots = new[] { Live(0, 1.5m, 3.0m), Live(120, 1.5m, 3.0m) };
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CreateSut().Detect(Event, snapshots).Should().BeEmpty();
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}
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[Fact]
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public void Should_EmitParseableEvidence_For_DetectedFreeze()
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{
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var snapshots = new[]
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{
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Live(0, 1.5m, 3.0m),
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Live(30, 1.5m, 3.0m),
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Live(120, 1.5m, 3.0m),
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};
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var anomaly = CreateSut().Detect(Event, snapshots).First();
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AnomalyEvidenceParser.TryParse(anomaly.EvidenceJson, out var data).Should().BeTrue();
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data.PreSuspension.Favourite.Should().Be(data.PostSuspension.Favourite, "the favourite is unchanged in a freeze");
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}
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[Fact]
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public void Should_Throw_When_FreezeThresholdOutOfRange()
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{
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var act = () => new SuspensionFreezeDetector(60, 0m, 3);
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act.Should().Throw<ArgumentOutOfRangeException>();
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}
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}
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