feat(engine): add FixedStrategyNestingEngine adapting IPlateNester strategies to INestingEngine

Implements a sealed adapter class that forces a fixed IPlateNester strategy onto any NestJob, overriding the job's own PlacementStrategy while preserving MaxPlates. Delegates all multi-plate allocation and stock selection to NestJobRunner. This allows single-plate nesting strategies to compete as full whole-job INestingEngine solvers in benchmarks, enabling comparative performance testing of placement algorithms across various job configurations. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-09-19 08:12:10 -04:00
parent f0fe79f0f1
commit ecca71e185
2 changed files with 73 additions and 0 deletions
@@ -0,0 +1,44 @@
+using OpenNest.CNC;
+using OpenNest.Geometry;
+using Xunit;
+
+namespace OpenNest.Engine.Tests.Jobs;
+
+public class FixedStrategyNestingEngineTests
+{
+    [Fact]
+    public void ForcesConfiguredStrategyRegardlessOfJobOptions()
+    {
+        var engine = new FixedStrategyNestingEngine("Strip");
+        // The job itself declares an unknown strategy; if FixedStrategyNestingEngine
+        // didn't override it, PlateNesterFactory would reject it with NotSupportedException.
+        var job = FiniteStockJobTests.Job(1, new NestJobOptions("Not A Real Strategy"));
+
+        var result = engine.Solve(job);
+
+        Assert.Equal(NestJobStatus.Complete, result.Status);
+    }
+
+    [Fact]
+    public void PreservesJobMaxPlates()
+    {
+        var engine = new FixedStrategyNestingEngine("Default");
+        var part = new NestJobPart("part", PartGeometrySnapshot.FromProgram(TestDrawingFactory.Rectangle(100, 100)), 6);
+        var stock = new NestPlateStock("sheet", new Size(220, 220), quantity: null, partSpacing: 2.0,
+            edgeSpacing: new Spacing(5.0, 5.0, 5.0, 5.0), quadrant: 1);
+        var job = new NestJob(new[] { part }, new[] { stock }, new NestJobOptions("Default", maxPlates: 1));
+
+        var result = engine.Solve(job);
+
+        Assert.Equal(NestJobStatus.Incomplete, result.Status);
+        Assert.Equal(NestJobStopReason.PlateLimitReached, result.StopReason);
+        Assert.Single(result.Plates);
+    }
+
+    [Fact]
+    public void RejectsNullOrWhitespaceStrategyAtConstruction()
+    {
+        Assert.Throws<ArgumentException>(() => new FixedStrategyNestingEngine(null));
+        Assert.Throws<ArgumentException>(() => new FixedStrategyNestingEngine("  "));
+    }
+}