From 29d58cc8af376b3aa8944ee6e402b73fc21f923d Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Mon, 16 Mar 2026 22:39:51 -0400
Subject: [PATCH] test(engine): add integration smoke tests for engine refactor

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 OpenNest.Tests/EngineRefactorSmokeTests.cs | 99 ++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 OpenNest.Tests/EngineRefactorSmokeTests.cs

diff --git a/OpenNest.Tests/EngineRefactorSmokeTests.cs b/OpenNest.Tests/EngineRefactorSmokeTests.cs
new file mode 100644
index 0000000..3e4e8b3
--- /dev/null
+++ b/OpenNest.Tests/EngineRefactorSmokeTests.cs
@@ -0,0 +1,99 @@
+using OpenNest.Geometry;
+
+namespace OpenNest.Tests;
+
+public class EngineRefactorSmokeTests
+{
+    private static Drawing MakeRectDrawing(double w, double h, string name = "rect")
+    {
+        var pgm = new OpenNest.CNC.Program();
+        pgm.Codes.Add(new OpenNest.CNC.RapidMove(new Vector(0, 0)));
+        pgm.Codes.Add(new OpenNest.CNC.LinearMove(new Vector(w, 0)));
+        pgm.Codes.Add(new OpenNest.CNC.LinearMove(new Vector(w, h)));
+        pgm.Codes.Add(new OpenNest.CNC.LinearMove(new Vector(0, h)));
+        pgm.Codes.Add(new OpenNest.CNC.LinearMove(new Vector(0, 0)));
+        return new Drawing(name, pgm);
+    }
+
+    [Fact]
+    public void DefaultEngine_FillNestItem_ProducesResults()
+    {
+        var plate = new Plate(120, 60);
+        var engine = new DefaultNestEngine(plate);
+        var item = new NestItem { Drawing = MakeRectDrawing(20, 10) };
+
+        var parts = engine.Fill(item, plate.WorkArea(), null, System.Threading.CancellationToken.None);
+
+        Assert.True(parts.Count > 0, "DefaultNestEngine should fill parts");
+    }
+
+    [Fact]
+    public void DefaultEngine_FillGroupParts_ProducesResults()
+    {
+        var plate = new Plate(120, 60);
+        var engine = new DefaultNestEngine(plate);
+        var drawing = MakeRectDrawing(20, 10);
+        var groupParts = new List<Part> { new Part(drawing) };
+
+        var parts = engine.Fill(groupParts, plate.WorkArea(), null, System.Threading.CancellationToken.None);
+
+        Assert.True(parts.Count > 0, "DefaultNestEngine group fill should produce parts");
+    }
+
+    [Fact]
+    public void DefaultEngine_ForceFullAngleSweep_StillWorks()
+    {
+        var plate = new Plate(120, 60);
+        var engine = new DefaultNestEngine(plate);
+        engine.ForceFullAngleSweep = true;
+        var item = new NestItem { Drawing = MakeRectDrawing(20, 10) };
+
+        var parts = engine.Fill(item, plate.WorkArea(), null, System.Threading.CancellationToken.None);
+
+        Assert.True(parts.Count > 0, "ForceFullAngleSweep should still produce results");
+    }
+
+    [Fact]
+    public void StripEngine_Nest_ProducesResults()
+    {
+        var plate = new Plate(120, 60);
+        var engine = new StripNestEngine(plate);
+        var items = new List<NestItem>
+        {
+            new NestItem { Drawing = MakeRectDrawing(20, 10, "large"), Quantity = 10 },
+            new NestItem { Drawing = MakeRectDrawing(8, 5, "small"), Quantity = 5 },
+        };
+
+        var parts = engine.Nest(items, null, System.Threading.CancellationToken.None);
+
+        Assert.True(parts.Count > 0, "StripNestEngine should nest parts");
+    }
+
+    [Fact]
+    public void DefaultEngine_Nest_ProducesResults()
+    {
+        var plate = new Plate(120, 60);
+        var engine = new DefaultNestEngine(plate);
+        var items = new List<NestItem>
+        {
+            new NestItem { Drawing = MakeRectDrawing(20, 10, "a"), Quantity = 5 },
+            new NestItem { Drawing = MakeRectDrawing(15, 8, "b"), Quantity = 3 },
+        };
+
+        var parts = engine.Nest(items, null, System.Threading.CancellationToken.None);
+
+        Assert.True(parts.Count > 0, "Base Nest method should place parts");
+    }
+
+    [Fact]
+    public void BruteForceRunner_StillWorks()
+    {
+        var plate = new Plate(120, 60);
+        var drawing = MakeRectDrawing(20, 10);
+
+        var result = OpenNest.Engine.ML.BruteForceRunner.Run(drawing, plate, forceFullAngleSweep: true);
+
+        Assert.NotNull(result);
+        Assert.True(result.PartCount > 0);
+    }
+}