Fix template engine to access real template cache by changing virtualizeSettings to false

Co-authored-by: jongalloway <[email protected]>

Author: Copilot

DotNetMcp.Tests/TemplateEngineHelperTests.cs

@@ -0,0 +1,86 @@
+using DotNetMcp;
+using FluentAssertions;
+using Xunit;
+
+namespace DotNetMcp.Tests;
+
+public class TemplateEngineHelperTests
+{
+    [Fact]
+    public async Task GetInstalledTemplatesAsync_ReturnsTemplates()
+    {
+        // Act
+        var result = await TemplateEngineHelper.GetInstalledTemplatesAsync();
+
+        // Assert
+        result.Should().NotBeNull();
+        result.Should().NotContain("No templates found");
+        result.Should().Contain("Installed .NET Templates:");
+        result.Should().Contain("Total templates:");
+        
+        // Verify that at least common templates are present
+        // These are part of the default .NET SDK installation
+        result.Should().Contain("console");
+        result.Should().Contain("classlib");
+    }
+
+    [Fact]
+    public async Task SearchTemplatesAsync_FindsConsoleTemplate()
+    {
+        // Act
+        var result = await TemplateEngineHelper.SearchTemplatesAsync("console");
+
+        // Assert
+        result.Should().NotBeNull();
+        result.Should().NotContain("No templates found");
+        result.Should().Contain("console");
+    }
+
+    [Fact]
+    public async Task GetTemplateDetailsAsync_ReturnsDetailsForConsoleTemplate()
+    {
+        // Act
+        var result = await TemplateEngineHelper.GetTemplateDetailsAsync("console");
+
+        // Assert
+        result.Should().NotBeNull();
+        result.Should().NotContain("not found");
+        result.Should().Contain("console");
+        result.Should().Contain("Short Name");
+    }
+
+    [Fact]
+    public async Task ValidateTemplateExistsAsync_ReturnsTrueForConsoleTemplate()
+    {
+        // Act
+        var result = await TemplateEngineHelper.ValidateTemplateExistsAsync("console");
+
+        // Assert
+        result.Should().BeTrue();
+    }
+
+    [Fact]
+    public async Task ValidateTemplateExistsAsync_ReturnsFalseForNonExistentTemplate()
+    {
+        // Act
+        var result = await TemplateEngineHelper.ValidateTemplateExistsAsync("non-existent-template-xyz123");
+
+        // Assert
+        result.Should().BeFalse();
+    }
+
+    [Fact]
+    public async Task ClearCacheAsync_ClearsTheCache()
+    {
+        // Arrange - Load templates into cache
+        await TemplateEngineHelper.GetInstalledTemplatesAsync();
+
+        // Act - Clear the cache
+        await TemplateEngineHelper.ClearCacheAsync();
+
+        // Assert - Should still be able to reload templates after clearing
+        var result = await TemplateEngineHelper.GetInstalledTemplatesAsync();
+        result.Should().NotContain("No templates found");
+        result.Should().Contain("Total templates:");
+    }
+}

DotNetMcp/TemplateEngineHelper.cs

@@ -43,7 +43,7 @@ private static async Task<IEnumerable<ITemplateInfo>> GetTemplatesCachedAsync(IL
                 logger?.LogDebug("Template cache miss - loading templates from template engine");
                 var engineEnvironmentSettings = new EngineEnvironmentSettings(
                     new DefaultTemplateEngineHost("dotnet-mcp", "1.0.0"),
-                    virtualizeSettings: true);
+                    virtualizeSettings: false);
 
                 var templatePackageManager = new TemplatePackageManager(engineEnvironmentSettings);
                 _templatesCache = await templatePackageManager.GetTemplatesAsync(default);