test(frontend): share the in-process console runner

Three front-end test classes ran NestConsole.Run through their own
reflection helper. They now import ConsoleHost.RunConsole.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

OpenNest.FrontEnd.Tests/ConsoleHost.cs

@@ -0,0 +1,15 @@
+using System.Reflection;
+
+namespace OpenNest.FrontEnd.Tests;
+
+/// <summary>Runs the console front end in-process. Import with <c>using static</c>.</summary>
+internal static class ConsoleHost
+{
+    /// <summary>Calls <c>NestConsole.Run</c> and returns its exit code.</summary>
+    public static int RunConsole(params string[] args)
+    {
+        var method = Assembly.Load("OpenNest.Console").GetType("NestConsole")!
+            .GetMethod("Run", BindingFlags.Static | BindingFlags.Public)!;
+        return (int)method.Invoke(null, new object[] { args })!;
+    }
+}

OpenNest.FrontEnd.Tests/CuttingPlanFrontEndTests.cs

@@ -5,6 +5,7 @@ using OpenNest.Geometry;
 using OpenNest.IO;
 using OpenNest.Mcp;
 using OpenNest.Mcp.Tools;
+using static OpenNest.FrontEnd.Tests.ConsoleHost;
 
 namespace OpenNest.FrontEnd.Tests;
 
@@ -171,13 +172,6 @@ public class CuttingPlanFrontEndTests : IDisposable
         Assert.False(part.HasManualLeadIns);
     }
 
-    private static int RunConsole(params string[] args)
-    {
-        var method = Assembly.Load("OpenNest.Console").GetType("NestConsole")!
-            .GetMethod("Run", BindingFlags.Static | BindingFlags.Public)!;
-        return (int)method.Invoke(null, new object[] { args })!;
-    }
-
     private static Nest Fixture(Program program, params Vector[] locations)
     {
         var nest = new Nest("fixture");

OpenNest.FrontEnd.Tests/NestingPipelineTests.cs

@@ -6,6 +6,7 @@ using OpenNest.Geometry;
 using OpenNest.IO;
 using OpenNest.Mcp;
 using OpenNest.Mcp.Tools;
+using static OpenNest.FrontEnd.Tests.ConsoleHost;
 
 namespace OpenNest.FrontEnd.Tests;
 
@@ -75,13 +76,6 @@ public class NestingPipelineTests : IDisposable
             new[] { new StockUsage(job.Plates[0].Id, 999, 0) });
     }
 
-    private static int RunConsole(params string[] args)
-    {
-        var method = Assembly.Load("OpenNest.Console").GetType("NestConsole")!
-            .GetMethod("Run", BindingFlags.Static | BindingFlags.Public)!;
-        return (int)method.Invoke(null, new object[] { args })!;
-    }
-
     [Theory]
     [InlineData("overlap", false, 2)]
     [InlineData("overlap", true, 0)]

OpenNest.FrontEnd.Tests/RegexImportFailureTests.cs

@@ -11,6 +11,7 @@ using OpenNest.Geometry;
 using OpenNest.IO.Bending;
 using OpenNest.Mcp;
 using OpenNest.Mcp.Tools;
+using static OpenNest.FrontEnd.Tests.ConsoleHost;
 using CadLayer = ACadSharp.Tables.Layer;
 using CadLine = ACadSharp.Entities.Line;
 
@@ -136,13 +137,6 @@ public class RegexImportFailureTests : IDisposable
         Assert.Equal(hash, Hash(bad));
     }
 
-    private static int RunConsole(params string[] args)
-    {
-        var method = Assembly.Load("OpenNest.Console").GetType("NestConsole")!
-            .GetMethod("Run", BindingFlags.Static | BindingFlags.Public)!;
-        return (int)method.Invoke(null, new object[] { args })!;
-    }
-
     private string WriteDxf(string name, bool marker)
     {
         var document = new CadDocument();