update

tests/TraceCad.Tests/ValidationTests.cs

@@ -0,0 +1,58 @@
+using TraceCad.Core.Geometry;
+using TraceCad.Core.Model;
+using TraceCad.Core.Validation;
+using Xunit;
+
+namespace TraceCad.Tests;
+
+public sealed class ValidationTests
+{
+    [Fact]
+    public void ValidatorReportsZeroLengthLineAsError()
+    {
+        var document = SketchDocument.CreateDefault();
+        document.AddEntity(new LineEntity(
+            Guid.NewGuid(),
+            Layer.Cut.Name,
+            new Point2(10, 10),
+            new Point2(10, 10)));
+
+        var issues = DrawingValidator.Validate(document);
+
+        Assert.Contains(issues, issue =>
+            issue.Severity == DrawingIssueSeverity.Error &&
+            issue.Code == "line.zero_length");
+    }
+
+    [Fact]
+    public void ValidatorReportsTinyLineAsWarning()
+    {
+        var document = SketchDocument.CreateDefault();
+        document.AddEntity(new LineEntity(
+            Guid.NewGuid(),
+            Layer.Cut.Name,
+            new Point2(0, 0),
+            new Point2(0.01, 0)));
+
+        var issues = DrawingValidator.Validate(document);
+
+        Assert.Contains(issues, issue =>
+            issue.Severity == DrawingIssueSeverity.Warning &&
+            issue.Code == "line.tiny");
+    }
+
+    [Fact]
+    public void ValidatorIgnoresOpenEndpointsOnNonExportableLayers()
+    {
+        var document = SketchDocument.CreateDefault();
+        document.AddEntity(new LineEntity(
+            Guid.NewGuid(),
+            Layer.Construction.Name,
+            new Point2(0, 0),
+            new Point2(100, 0)));
+
+        var issues = DrawingValidator.Validate(document);
+
+        Assert.DoesNotContain(issues, issue => issue.Code == "contour.open_endpoint");
+    }
+}