fb6b61e8ef
Adds TierResidence enum (None/Far/Near), _tierResidence dictionary seeded by MarkResidentFromBootstrap, and the canonical two-tier RecenterTo overload returning TwoTierDiff. Pass 1 walks the new far window and emits ToLoadFar / ToLoadNear / ToPromote; Pass 2 walks prior residents and emits ToDemote / ToUnload using Chebyshev hysteresis thresholds (NearRadius+2 / FarRadius+2). EncodeLandblockIdForTest exposes the encoding rule to test assemblies. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
56 lines
2.1 KiB
C#
56 lines
2.1 KiB
C#
using AcDream.App.Streaming;
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using Xunit;
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namespace AcDream.Core.Tests.Streaming;
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public class StreamingRegionTwoTierTests
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{
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[Fact]
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public void Constructor_TwoRadii_ExposesNearAndFarRadii()
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{
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var region = new StreamingRegion(centerX: 100, centerY: 100, nearRadius: 4, farRadius: 12);
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Assert.Equal(4, region.NearRadius);
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Assert.Equal(12, region.FarRadius);
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Assert.Equal(100, region.CenterX);
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Assert.Equal(100, region.CenterY);
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// Radius (used by existing single-radius hysteresis math) must alias to
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// FarRadius — the outer ring drives "everything currently loaded" bookkeeping.
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// If a future change mistakenly aliases Radius to NearRadius, hysteresis
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// becomes (NearRadius+2) for the far-tier unload, which is wrong.
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Assert.Equal(region.FarRadius, region.Radius);
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}
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[Fact]
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public void RecenterTo_FirstTick_SplitsLoadIntoNearAndFar()
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{
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// near=1, far=3 → near window is 3×3=9, far window is 7×7-3×3=40 LBs.
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var region = new StreamingRegion(centerX: 100, centerY: 100, nearRadius: 1, farRadius: 3);
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var diff = region.ComputeFirstTickDiff();
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Assert.Equal(9, diff.ToLoadNear.Count);
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Assert.Equal(40, diff.ToLoadFar.Count);
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Assert.Empty(diff.ToPromote);
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Assert.Empty(diff.ToDemote);
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Assert.Empty(diff.ToUnload);
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}
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[Fact]
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public void RecenterTo_PlayerWalks_NullToFar_AppearsInToLoadFar()
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{
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var region = new StreamingRegion(centerX: 100, centerY: 100, nearRadius: 1, farRadius: 3);
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_ = region.ComputeFirstTickDiff();
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region.MarkResidentFromBootstrap();
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// Walk one LB east — center (100,100) → (101,100). LB column at lbX=104
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// (relative dx=+3 from new center) enters the far window from null.
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var diff = region.RecenterTo(newCx: 101, newCy: 100);
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foreach (var y in new[] { 97, 98, 99, 100, 101, 102, 103 })
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{
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var id = StreamingRegion.EncodeLandblockIdForTest(104, y);
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Assert.Contains(id, diff.ToLoadFar);
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}
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Assert.Empty(diff.ToLoadNear);
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}
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}
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