feat(core): add RingShape

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-17 08:00:11 -04:00
parent 5d0de4a1b1
commit 641734ba70
2 changed files with 59 additions and 0 deletions
@@ -0,0 +1,37 @@
+using OpenNest.Shapes;
+
+namespace OpenNest.Tests.Shapes;
+
+public class RingShapeTests
+{
+    [Fact]
+    public void GetDrawing_BoundingBoxMatchesOuterDiameter()
+    {
+        var shape = new RingShape { OuterDiameter = 20, InnerDiameter = 10 };
+        var drawing = shape.GetDrawing();
+
+        var bbox = drawing.Program.BoundingBox();
+        Assert.Equal(20, bbox.Width, 0.01);
+        Assert.Equal(20, bbox.Length, 0.01);
+    }
+
+    [Fact]
+    public void GetDrawing_AreaExcludesInnerHole()
+    {
+        var shape = new RingShape { OuterDiameter = 20, InnerDiameter = 10 };
+        var drawing = shape.GetDrawing();
+
+        // Area = pi * (10^2 - 5^2) = pi * 75
+        var expectedArea = System.Math.PI * 75;
+        Assert.Equal(expectedArea, drawing.Area, 0.5);
+    }
+
+    [Fact]
+    public void GetDrawing_DefaultName_IsRing()
+    {
+        var shape = new RingShape { OuterDiameter = 20, InnerDiameter = 10 };
+        var drawing = shape.GetDrawing();
+
+        Assert.Equal("Ring", drawing.Name);
+    }
+}